LazStats: initial commit.

git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@7345 8e941d3f-bd1b-0410-a28a-d453659cc2b4

applications/lazstats/Options.txt

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+0
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+D:\Prog_Lazarus\wp-git\LazStats

applications/lazstats/README.txt

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+--------------------------------------------------------------------------------
+LazStats
+--------------------------------------------------------------------------------
+Clone of the LazStats statistics application by William Miller 
+(https://openstat.info/LazStatsMain.htm)
+
+What is different?
+------------------
+- Updated form layout.
+- Units into subfolders for each major menu command in order to avoid the 
+  extremely long file list in the project manager.
+- Include data and html folder of the original site. Add data file from the
+  OpenStat application mentioned in the pdf help files.
+- Create chm help from the original pdf help files, tool used: HelpNDoc.

applications/lazstats/source/LazStats.ini

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+[LANGUAGE]
+DEFAULT=ENGLISH
+[ENGLISH]
+101=Directions: For entry of data on this form, enter the number of rows, columns and slices in the boxes provided.  Press enter after each entry.  Then enter the frequencies observed for each cell in the grid. If entering data from a file in the main grid, select the row, column, slice and frequency variables by selecting from the list of variables and clicking the right-arrow for the corresponding variable.  Click the compute button to obtain the results.
+102=The AxBxR ANOVA involves two between treatment factors and repeated measures factors. Two grid column variables contain the A and B treatment values (codes 1, 2, etc.) and 2 to K grid column variables for the repeated measure observations.  All ABC groups are assumed to be of the same size.  There is a maximum of 20 repeated measures.
+103=This procedure analyzes fixed effects with up to three levels of interaction and one or more covariates.  Multiple regression methods are used (See "Multiple Regression in Behavioral Research" by  Elazar J. Pedhazur, Harcourt, Brace, College Publishers, 1997, Chapter 16, pages 675-713.)  A test is performed for the assumption of homogeneous regression slopes in addition to the ANCOVA.  Both adjusted and unadjusted means are reported. Comparisons are made among the adjusted means.
+104=Directions:  Select a variable to analyze.  You may analyxe series from either a column (default) or a "Case" row.  You may elect to analyze all values in a column (or row) as desiredClick the buttons for any desired smoothing options.  The program will automatically "split" the list of row values (or column values) for that variable into two sub-sets of X and Y scores with each Y score being the value which "lags" behind the X score in the list by k lag values.  All possible lags which yield a sample as large as 3 or more are computed and plotted in a "correlogram".  You may optionally print the lag,
+correlation, means, standard deviations and confidence interval for each correlation. The differences between original and smoothed values (residuals) may be plotted.  The smoothed points replace the original values in the analysis if smoothing is elected.
+105=The main grid should contain a symetric matrix of similarity or dissimilarity values representing distances among the objects to be clustered.  Check the type box io indicate if the measures are similarities (e.g. correlations) or dissimilarities.
+106=Directions:  It is assumed you have one grid column variable representing the group codes for the (A) between treatment groups effect and 2 to k column variables representing the repeated measures.  Group codes should be sequential values of 1, 2, etc.  You may elect to plot the means.
+107=Directions:  You may elect to complete a 1, 2 or 3 way ANOVA by selecting a dependent variable and 1, 2 or 3 factor variables. If you elect post-hoc tests, comparisons are made between factor levels.  NOTE: some post-hoc comparisons are made only with equal N's.
+108=Directions:  First click on the variable name that represents the group codes.  Next, click on the variable that reresents the measurement to be plotted.  Click the Compute button to obtain the results.  You can obtain a single boxplot for all cases if you use a "dummy" group variable containing only the group code 1 for all cases.
+109=Directions: First, select the categorical variables of your study.  Select them in the order of the desired breakdown. Next, slect the continuous variable for which you want statistics for each cell obtained by by breaking down the categorical variables into their respective categories.
+110=Directions: 1.   Select the variable containing the bubble identification mumber - an integer in the range of 1 to N objects.  2.   Select the variable representing the X axis integer value for the object.  This is the repeated measures variable.  3.   Select the variable representing the Y axis.  This should be a floating point value.  4.   Select the variable representing the size of the bubble for each object to be plotted at the X and Y location. NOTE: Each data line reresents one replication (X value) of the object plotted.  See the example data in the file labeled BubblePlot.LAZ
+111=NOTE:  No. of left hand variables must be less than or equal to the number of right hand variables.
+112=Directions:  Click on the variable that represents the measurement.  Click on the Sigma button to change the default value.  Click the Compute button to obtain the results.
+113=Directions:  Two to k variables representing dichotomous (0,1) values are analyzed for N cases.  The values of the variables reflect repeated observations on the same subjects or on matched subjects.  Click the variables on the left to analyze and enter them by clicking the right arrow button.
+114=Directions:  Forst select the test scores from the available variables.  You will see a default reliability and weight ssigned to each score selected in list boxes to the right.  If you click on either a reliability or a weight, an input box will appear in which you can enter a new reliability or weight.  Note - you can use the KR#21 reliability program to estimate reliability if you know the maximum score.
+115=Directions:  A Judge's ratings or observations are recorded as variables (columns) 1 through k.  Each line conrresponds to a different judge (person making the rating.)  Select the variables from the left list to analyze and click on the right arrow button to enter them. To remove a variable from the list of selected ones, click on the variable name in the selected list and click the left arrow button. Click the Compute button to obtain the results.
+116=Directions:  Select each categorical variable from the available variables in the leftmost box in the order that you wish to have the breakdown proceed.  Click the OK button to start the analysis.
+117=Directions:  First, click on the variable name that represents the sample lot number.  Next, click on the variable that represents the measurement.  Click on the Delta size and enter the desired value.  Click on the alpha and/or beta probability boxes and enter values to change from the default values.  You may also enter target specifications if you first click the check box to use a target specification.
+118=Description: Double Declining Value determines accelerated depreciation values for an asset given the initial cost, life expectancy, and value, and depreciation period.  EXAMPLE: What is the depreciation value for a computer with a life expectancy of three years if it initially cost $2,000.00 with no expected value at the end of the three years?  Initial Cost = 2000.00 Life Expectancy = 3 End Value = 0.0 Depreciation Period = 3 ANSWER: $148.15
+119=This procedure provides means, variances, standard deviations, skewness, kurtosis and range values for each variable selected. Select the variables in the left list and enter them for analysiis by clicking the right arrow. If you select the z score option, a new variable will be added to your grid for each variable you select.  The new variable will contain the transformation of the original variable into a z score.
+120=Each row of the grid below corresponds to one column of the data grid.  Complete the information requested in each cell of the row.  To add another variable (row in the dictionary), press the down-arrow on your keyboard.
+121=Directions:  Specify the lag value for the differences desired, e.g. 1 to obtain the difference between point 1 and 2, 2, and 3, etc.  Also, indicate the order, i.e. the number of times to repeat the differencing operation.  Click OK when ready.
+122=This procedure is an adaptation of the program written by Niels G. Waller, Dept. of Psychology, University of California-Davis, Jan. 1998.  It's purpose is to identify test items that differ in the response pattern for two groups: a reference group and a focal group.  The file of data to be analyzed should consist of a variable containing a code designating the two groups and variables containing subject's item responses coded 0 for incorrect and 1 for correct.  No missing data may be included.  The results provide the Mantel-Haenszel statistics for identifying those items which are different for the two groups.
+123=Directions:  The number of intervals may not exceed the number of cses.  To change the interval size, click on the current size and replace it with a new size.  Press the enter button after entering a new value.
+124=Directions:  The two way ANOVA on ranks is similar to a mixed design ANOVA with repeated measures (1 to k conditions) on ssubjects in 1 to M groups.  The program expects one variable to represent the group code, and 1 to k score variables for each case.  The scores for the cases in each group are used to obtain rankings among the k scores within each group.  The test is whether or not the rank totals for the conditions are equal within the expected sampling variability.
+125=This procedure calculates the Kappa coefficient for objects or subjects classified into two or more categories by a group of judges or procedures.  Each object is coded with a sequential integer ranging from 1 to the number of objects.  Each judge is also coded with an integer from 1 to the number of judges.  Categories are numbered with integers from 1 to the number of categories.  These are column variables.  It is expected that the total number of cases will be the number of judges times the number of objects.
+126=Directions:  he GLM procedure permits the user to specify multiple dependent variables and multiple independent variables.  Variables for both dependent and independent may be either continuous or categorical variables. The independent variables are classified as fixed effects, random effects, repeated measures or covariates.  Interactions among the independent variables may be specified for the model used.  To define an interaction in your model, click the start definition button and then click on each independent variable to be included in the interaction.  Click the end definition button to end the definition.  A maximum of 5 terms is allowed in an interaction.
+127=You may obtasin results for a single group or for experimental and control groups. If there is only one group, leave the group variable blank. Data entered on each line of the data grid represent one case within a group.  You will typically have two or three columns of data with variable labels like "TIME", "GROUP" and "EVENT".  Each variable should be defined as an integer in your variable definitions.  Note that the code for experimental and control groups are 1 and 2. The coding for the event or censored is 1 for the event (death) and 2 for the censored (lost, can't observe.)  An example file with the name "KaplanMeierTest.LAZ is available for use.
+128=This procedure provides both the weighted and unweighted Kappa Coefficients for assessing the consistency of judgements for two raters.  It also provides other measures of the independence of the ratings.  If nominal categories are used in the ratings, the unweighted statistic is appropriate.  If the categories represent ordinal data, the weighted Kappa statistics may be appropriate.  The number of rows must equal the number of columns to calculate the Kappa statistics.
+129=The main grid should contain data values representing variables meansured on the objects to be clustered (rows.)  Enter the desired number of clusters, select the variables to use in clustering and select the options desired.
+130=See B. J. Winer's "Statistical Principles in Experimental Design", McGraw-Hill Book Company, New York, 1962, pages 514-577 for the analyses plans provided in this procedure. Note:  Factor codes should be formatted as integers, data values as floating point values. All cell sizes should be equal and no missing values are allowed.
+131=Complete the specifications for your log-linear analysis of cross-classivation data as indicated below.  Complete step 1, step 2 and step 3.  Select any options desired.  Click the Compute button to obtain the results.  Should you need to start over, click the Reset button.  When your analysis or analyses are commpleted, click the Return button.
+132=Directions:  Enter the order of the moving averae. The order is the number of values on each side of a point  to be included in the average.  When you enter a value, a list of corresponding thetas will appear in the list.  Click on each theta of the list for entry of the desired weight (default 1.0). Enter a weight in the theta value box and press the enter key.  Repeat for each theta in the list. Click the Apply button when ready.  The theta values will be re-proportioned to sum to 1.0 accross all values.  Click the OK button to continue.
+133=Directions:  You may generate sample multivariate data from a population with known intercorrelation among the variables and with known population means and standard deviations. Enter the number of variables and size of the sample to generate. Then enter the correlations among the variables row-wise the program will fill in the lower triangular values.)  Next, enter the population means and standard deviations.  When ready to generate the data, click the ComputeBtn.  The data will be placed in the data grid.  You can save this data to a file.
+134=Directions:  1.   Select the X Variable  2.   Select the Y variable  3.   Select the group variable (integer)  4.   Enter a label for the plot  5.  Select an option if desired.  6.   Click the Compute button
+135=If you use a language that uses the comma (,) separator to separate the whole part from the fractional part of a number (e.g. 123,45) then select the EUROPEAN option.  The default is the English convention (a period, e.g. 123.45). You can enter a default directory to locate your data files. Click a button for values that represent a missing value and click a button that indicates how you want to display values in a grid cell (justification.)
+136=For partial and semi-partial correlations, select the dependent variable then select the predictor variable(s), and finally the variable(s) to be partialled.  Note that simple, higher order and multiple simple and higher order partialling may be completed as a function of the number of predictors and partialled variables included in the analysis.
+137=Directions:  The p Chart for nonconforming parts assumes you have a variable (column of data) which represents the number of nonconforming parts in a sample lot of size N.  You are expected to enter the sample size N in which each of the observations was made.  You will also need to enter P, the expected or target proportion of defects in a sample of N parts.  To select the measurement variable, click on the name of the variable in the list of variables available.  Enter the N and P values in the boxes provided.  If you desire a sigma value other than the default, click the desired button.  Click the Compute button to obtain the results.
+138=Directions:  To use the program you should have the following values coded for each subject: (1)  a variable (1/2) for the reference or focus group. (2) one or more items which contain an item score (integers representing response categories, e.g. a value from 1 to 5.  Follow these steps to complete the analysis: (1)  Enter the items in the available variables list into the selected items list. (2)  Enter the group variable from the available variables list to the group box. (3)  Enter the Lowest Item Score in the corresponding box. (4)  Enter the highest Item Score  in the corresponding box. (5)  Enter the Reference Group Code in its box. (6)  Enter the Focal Group Code in its box. (7)  Enter the number of levels of total scores to analyze in the corresponding box. (8)  For each level, enter the minimum and maximum scores.  Click the scroll bar to go to the next level.  You may need to click the down end of the scroll bar to correct errors or change minimum and maximum values for a level.
+139=Directions:  In polynomial regression smoothing, the value of a point y at a given time t is estimated by the sum of regression weights times t raised to a power of 1, 2, etc. up to the order specified.  Enter the order and click the OK button.
+140=Directions: Cases should consist of k dichotomous item scores (0 and 1 scores.)  You can use the Classical Test program to score your test and save the item scores to the grid if necessary.
+141=Directions:  First, click on the variable name that represents the sample lot number.  Next, click on the variable that represents the measurement. Click on the sigma button to change the default and click on any of the optional check boxes and enter specifications desired.  Click the Compute button to obtain the results.  Up to 200 groups may be analyzed. Note!  Equal group sizes of 2 to 25 required for ranges analysis.  Control limits are plus and minus 3 sigma.
+142=R = 1 - (s2 / S2) x (1 - r) where R is the estimated reliability of a test obtained on a new group with variance S2 when a reliability of r was obtained for the same test on a group with variance s2. It is assumed the difference in variance is due soley to the difference in true score variance of the two groups.  See Theory of Mental Tests by H. Guliksen, 1950.
+143=Directions:  Your data grid should consist of a table of N rows and M+1 column variables.  Each row should have a string type label variable and M columns of integer frequency data. 1. Enter the variable for the row labels (strings) 2.  Enter the variables representing the columns of frequency integers 3.  Select the Options desired 4.  If only one variable is to be considered the reference variable, click the button labeled "Use Only the reference variable selected and click on one of the column variables just selected to represent the reference distribution. 5. If each column variable is to be considered as a reference variable, click on the other button labeled "Let each variable be a reference variable" 6. Change the alpha level for significance if desired. 7. Check the Bonferroni contrasts if desired. 8. Click the Compute button to obtain the results.
+144=This procedure calculates the Pearson Product-Moment correlation coefficients for two or more variables.  If one or more of the variables selected have been filtered out or contain a missing value, the case containing that variable will not be included in the analysis (list-wise deletion.) You may elect to obtain not only the correlations but also the raw cross-products, the variance-covariance matrix and the means, variances and standard deviations of the variables. Click on the variable in the list to the left and enter it for analysis by clicking the right arrow box.  Repeat this for each variable to be included or click the ALL button to include all variables.
+145=Directions:  First click on the variable name that represents the sample lot number.  Next, click on the variable that represents the measurement. Click the Compute Button to obtain the results. NOTE!  Equal group (lot) sizes of 2 to 25 required for Sigma analysis. Control limits are plus and minus 3 sigma.  Up to 200 lots may be analyzed.
+146=Description: Straight Line Depreciation calculates the depreciation allowance for an asset over one period in it's life.  The function divides the cost minus the salvage value by the number of years of useful life of the asset.  Cost is the inital amount paid for the asset.  Salvage is the value left at the end of the asset's life. EXAMPLE: What is the depreciation value on might expect for a computer purchased for $2,000.00 and expected to have a useful life of three years with no residual value? ANSWER: Approximately $666.67
+147=R = Kr / (1 + (K - 1) r where R is the estimated reliability of a test when increased by a factor of K.  K is the number of items in the lengthened test divided by the number of items in the original test.  r is the reliability of the original test.
+148=Directions:  Click on the variables from the left list of available variables.  Click the right-pointing arrow to enter your selection(s).  You can remove a selected variable by clicking on it and click the left-pointing arrow button.  Click the Compute button to do the analysis. NOTE:  Some leaves may represent fragments smaller than the leaf depth.
+149=Description: Sum of Years Digits Depreciation calculates depreciation amounts for an asset using an accelerated depreciation method.  This allows for higher depreciation in the early years of an asset's life. Cost is the initial cost of the asset.  Salvage is the value of the asset at the end of it's life expectancy.  Life is the length of the asset's life expectancy.  Period is the period that you wish to calculate the depreciation. EXAMPLE: What is the depreciation for period 1, 2 or 3 that one can claim for a computer purchased at a price of $2,000.00 and expected to have a useful life of 3 years with no salvage value? ANSWER: $1,000.00 the first year, $666.67 the second period and  $333.33 the last year.
+150=New variables may be created that are transformations of an existing variable or a combination of two variables or a variable and a constant.  For example, you may want to create a new variable that is the natural log of an existing variable.  As another example, you may want to create a variable that is the product of two other variables. To create the new variable, enter a name for the new variable in the edit box provided for the new variable name.  Next, select the transformation in the list of functions available.  The selected transformation will be shown in a box below the list of functions.  Next, click on the name of the variable for the first arguement of the function to be performed and use the corresponding right arrow button to enter it.  If a second variable is required (V2) click on the name of the variable and enter it with the corresponding arrow for V2.  If a constant is required, click on the constant edit box and enter the value.  Click on the Compute button.
+151=Directions:  For Dependent samples, click on the three variables representing X, Y and Z (in that order.)  The test will compare the r(x,y) with the r(x,z). For Independent samples, click on the X and Y variables to be correlated and then the variable representing the group coding variable.  The correlations obtained in each of two groups will be compared.
+152=Directions:  For independent groups you should have a variable indicating group membership using 1 and 2 for the group codes and a variable with 0 or 1 values which represent observed or not observed in the group.  For dependent proportions you should have two variables code with 0 or 1 in each case.
+153=Select the Dependent Variable and enter it in its box. Select the predictors (including the ones dependent on the instrumental variables) and enter them in the explanatory list. Copy the predictors dependent on the instrumental variables to the Instrumental Variables list.  Add the instrumental variables to the same list. Select options desired and click the Compute button. NOTE: The number of variables in the Instrumental list should be equal to or greater than the Explanatory list.
+154=Directions:  Data may be entered on this form or from a file loaded in the grid. First, enter the number of rows and columns pressing the return key after each entry.  If entering Grid data, click on the variables corresponding to row, column and frequency data.  If entering on this form, enter the frequencies in the cells corresponding to the row and column of your data.
+155=Directions:  Click on the variable that represents the count of defects. Enter the number inspected in each subgroup (lot.)  Note - all groups are of equal size.  Click on a Sigma button to change to a different value.  You may enter a specific value if you choose the X sigma option.  Click the Compute button to see the results.
+156=Directions:  First click on one of the variables representing matched pairs of observations from the list of available variables.  Click the right-pointing button to enter your choice for variable 1.  Repeat for the second variable.  Click the Compute button to obtain the results.
+157=Directions:  The repeated measures ANOVA requires you to select two or more variables (columns) which represent repeated observations on the same subjects (rows.)  Homogeneity of variance and covariance are assumed and may be tested as an option.  In addition, the ANOVA provides the basis for estimates of reliability as developed by Hoyt (Intraclass reliability) with the adjusted estimate equivalent to the Cronbach Alpha estimate.  Finally, you may elect to plot the means obtained for the repeated measures.
+158=Weighted Least Squares Regression lets you save the residuals and squared residuals for an OLS weighted analysis.  You may also complete a regression of these residuals on the independent variables and save the residuals and squared residuals from those analyses.  The square root of the reciprocal of the absolute squared residuals from this last analysis may be used as weights to reduce the heteroscedasticity in your data. If this option is chosen, an OLS regression of the weighted variables is conducted.  This may be done through the origin.
+159=Directions:  Firs, click in the variable name that represents the sample lot numbers.  Next, click on the variable that represents the measurement. Click on the sigma button to change the default and click on any of the optional check boxes and enter specifications desired.  Click the Compute button to obtain the results.
+160=Correspondence analysis is a method for examining the relationship between two sets of categorical variables much as in a Chi-Squared analysis of a two-way contingency table. In fact, a typical chi-squared analysis is completed as part of this procedure. In addition, visualization of the relationships among the columns or rows of the analysis is performed in a manner similar to factor analysis. The data analyzed in the visualization is the table of relative proportions, that is, the original frequency values divided by the sum of all frequencies. The relative proportions of the row sums and the column sums are termed the �masses� of the rows or columns.  The method used to analyze the relative proportions involves what is now called the �Generalized Singular Value Decomposition� or more simply the generalized SVD. This method obtains roots and vectors of a rectangular matrix by decomposing that matrix into three portions: a matrix of left singular column vectors (A) that has n rows and q columns (n � q), a square diagonal matrix with q rows and columns of singular values (D), and a transposed matrix (B�) that is m x q in size of right generalized singular vectors (m = q-1). Completing this analysis involves several steps. The first is to obtain the (regular) SVD analysis of a matrix Q defined as Dr-1/2PDc -1/2 where Dr and Dc are diagonal matrices of row and column relative proportions and P is the matrix of relative proportions. The SVD of Q gives Q = U D V� where D is the desired diagonal matrix of eigenvalues and U�U = V�V = I. It should be noted that the first of the q roots is trivial and to be ignored. At this point we obtain A = Dr1/2U and B = Dc 1/2 V.  The results of this SVD analysis is available on the output. Now P = ADB�. The row coordinates F and column coordinates G are then computed according to the table: Analysis Choice Button Selected Row Coordinates Column Coordinates Row Profile Row F = Dr-1AD G = Dc-1B Column Profile Column F = Dr-1A G = Dc-1BD Both Profiles Both F = Dr-1AD G = Dc-1BD If Row profiles are computed, the row coordinates are weighted centroids of the column coordinates and the inertias D2 refer only to the row points. If the column profiles are computed, the column coordinates are weighted eentroids of the row coordinates and the inertias D2 refer only to the column points. If both profiles are selected, neither row or column coordinates are weighted centroids of the other but the inertias D2 refer to both sets of points. The q-1 inertias are plotted in a manner similar to a scree plot of roots in a factor analysis. The total inertia is, in fact, the chi-squared statistic divided by the total of all cell frequencies.  You may elect to plot the coordinates for any two pairs of coordinates. This will provide a graphical representation of the separation of the row or column categories similar to a plot of variables in a discriminant function analysis or factors in a factor analysis. A way of looking at correspondence analysis is to consider it as a method for decomposing the overall inertia by identifying a small number of dimensions in which the deviations from the expected values can be represented. This is similar to factor analysis where the total variance is decomposed so as to arrive at a lower dimensional representation of variables.

applications/lazstats/source/LazStats.lpr

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+program LazStats;
+
+{$mode objfpc}{$H+}
+
+uses
+  {$IFDEF UNIX}{$IFDEF UseCThreads}
+  cthreads,
+  {$ENDIF}{$ENDIF}
+  Interfaces, // this includes the LCL widgetset
+  Forms,
+  Globals, LicenseUnit, OptionsUnit, MainDM, MainUnit;
+
+{$R LazStats.res}
+
+begin
+  RequireDerivedFormResource := True;
+  Application.Title:='';
+  Application.Scaled:=True;
+  Application.Initialize;
+
+  LoadOptions;
+  if not LoggedOn then
+  begin
+    if AcceptLicenseForm then
+      LoggedOn := true
+    else
+      Application.Terminate;
+  end;
+
+  Application.CreateForm(TMainDataModule, MainDataModule);
+  Application.CreateForm(TOS3MainFrm, OS3MainFrm);
+  Application.Run;
+end.
+

applications/lazstats/source/forms/analysis/comparisons/abcnestedunit.lfm

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+object ABCNestedForm: TABCNestedForm
+  Left = 529
+  Height = 640
+  Top = 153
+  Width = 479
+  AutoSize = True
+  Caption = 'ABCNestedForm'
+  ClientHeight = 640
+  ClientWidth = 479
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = ResetBtnClick
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 266
+    Height = 25
+    Top = 607
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 2
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 328
+    Height = 25
+    Top = 607
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 3
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 412
+    Height = 25
+    Top = 607
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 4
+  end
+  object OptionsBox: TRadioGroup
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 72
+    Top = 519
+    Width = 463
+    Anchors = [akLeft, akRight, akBottom]
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    Caption = 'OptionsBox'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.HorizontalSpacing = 16
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 2
+    ClientHeight = 52
+    ClientWidth = 459
+    Columns = 2
+    Items.Strings = (
+      'Plot means using 2D Horizontal Bars'
+      'Plot means using 3D Horizontal Bars'
+      'Plot means using 2D Vertical Bars'
+      'Plot means using 3D Vertical Bars'
+    )
+    TabOrder = 1
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 591
+    Width = 479
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Memo1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 8
+    Height = 180
+    Top = 8
+    Width = 463
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'Directions:  This analysis assumes that levels of Factor B are Nested within levels of Factor A. It is assumed that all factors are fixed level factors.'#13#10#13#10'The variables for the group coding should be defined as integers.  The dependent variable should be defined as a floating point variable. The number of cases for each ABC group should be equal and the number of B treatments in in each A level should be equal.  The number of C treatment levels should be the same for each AB combination.'#13#10#13#10'Click the variable for each factor variable and the corresponding arrow to enter it in the edit box for that variable.  Select the type of plot desired for the means (if any.)  Click the Compute button to continue.'
+    ParentColor = False
+    WordWrap = True
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Memo1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = OptionsBox
+    Left = 8
+    Height = 307
+    Top = 204
+    Width = 463
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 16
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    BevelOuter = bvNone
+    ClientHeight = 307
+    ClientWidth = 463
+    TabOrder = 0
+    object Label2: TLabel
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = FactorAEdit
+      Left = 253
+      Height = 15
+      Top = 25
+      Width = 88
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Factor A Variable'
+      ParentColor = False
+    end
+    object Label3: TLabel
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = FactorBEdit
+      Left = 253
+      Height = 15
+      Top = 101
+      Width = 115
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Factor B (Nested in A)'
+      ParentColor = False
+    end
+    object Label4: TLabel
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = DepEdit
+      Left = 253
+      Height = 15
+      Top = 253
+      Width = 102
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Dependent Variable'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Label1
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = AInBtn
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 290
+      Top = 17
+      Width = 209
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 0
+    end
+    object AInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = VarList
+      Left = 217
+      Height = 28
+      Top = 17
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = AInBtnClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object AOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = AInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 217
+      Height = 28
+      Top = 49
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = AOutBtnClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object BInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = AOutBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 217
+      Height = 28
+      Top = 93
+      Width = 28
+      BorderSpacing.Top = 16
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = BInBtnClick
+      Spacing = 0
+      TabOrder = 4
+    end
+    object BOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = BInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 217
+      Height = 28
+      Top = 125
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = BOutBtnClick
+      Spacing = 0
+      TabOrder = 5
+    end
+    object DepInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = COutBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 217
+      Height = 28
+      Top = 245
+      Width = 28
+      BorderSpacing.Top = 16
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = DepInBtnClick
+      Spacing = 0
+      TabOrder = 10
+    end
+    object DepOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = DepInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 217
+      Height = 28
+      Top = 277
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = DepOutBtnClick
+      Spacing = 0
+      TabOrder = 11
+    end
+    object FactorAEdit: TEdit
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = AOutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 253
+      Height = 23
+      Top = 42
+      Width = 210
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 3
+      Text = 'FactorAEdit'
+    end
+    object FactorBEdit: TEdit
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = BOutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 253
+      Height = 23
+      Top = 118
+      Width = 210
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 6
+      Text = 'FactorBEdit'
+    end
+    object DepEdit: TEdit
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = DepOutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 253
+      Height = 23
+      Top = 270
+      Width = 210
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 12
+      Text = 'DepEdit'
+    end
+    object CInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = BOutBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 217
+      Height = 28
+      Top = 169
+      Width = 28
+      BorderSpacing.Top = 16
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = CInBtnClick
+      Spacing = 0
+      TabOrder = 7
+    end
+    object COutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = CInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 217
+      Height = 28
+      Top = 201
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = COutBtnClick
+      Spacing = 0
+      TabOrder = 8
+    end
+    object FactorCEdit: TEdit
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = COutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 253
+      Height = 23
+      Top = 194
+      Width = 210
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 9
+      Text = 'FactorCEdit'
+    end
+    object Label5: TLabel
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = FactorCEdit
+      Left = 253
+      Height = 15
+      Top = 177
+      Width = 88
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Factor C Variable'
+      ParentColor = False
+    end
+    object Label1: TLabel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Panel1
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 100
+      Caption = 'Available Variables:'
+      ParentColor = False
+    end
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/abranovaunit.lfm

@@ -0,0 +1,380 @@
+object ABRAnovaFrm: TABRAnovaFrm
+  Left = 577
+  Height = 405
+  Top = 337
+  Width = 481
+  AutoSize = True
+  Caption = 'AxBxR ANOVA (two between and repeated measures)'
+  ClientHeight = 405
+  ClientWidth = 481
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 51
+    Top = 305
+    Width = 324
+    Anchors = [akLeft, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    Caption = 'Options:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.HorizontalSpacing = 24
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 2
+    ClientHeight = 31
+    ClientWidth = 320
+    TabOrder = 1
+    object PlotChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 79
+      Caption = 'Plot Means'
+      TabOrder = 0
+    end
+    object TestChk: TCheckBox
+      Left = 115
+      Height = 19
+      Top = 6
+      Width = 193
+      Caption = 'Test Homogeneity of Covariance'
+      TabOrder = 1
+    end
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 268
+    Height = 25
+    Top = 372
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 3
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 330
+    Height = 25
+    Top = 372
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 4
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 414
+    Height = 25
+    Top = 372
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 5
+  end
+  object HelpBtn: TButton
+    Tag = 102
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 209
+    Height = 25
+    Top = 372
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 2
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 356
+    Width = 481
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = GroupBox1
+    Left = 8
+    Height = 289
+    Top = 8
+    Width = 465
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    BevelOuter = bvNone
+    ClientHeight = 289
+    ClientWidth = 465
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Panel1
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 100
+      Caption = 'Available Variables:'
+      ParentColor = False
+    end
+    object Label2: TLabel
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = ACodes
+      Left = 254
+      Height = 15
+      Top = 25
+      Width = 88
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Factor A Variable'
+      ParentColor = False
+    end
+    object Label3: TLabel
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = BCodes
+      Left = 254
+      Height = 15
+      Top = 109
+      Width = 87
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Factor B Variable'
+      ParentColor = False
+    end
+    object Label4: TLabel
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = CInBtn
+      Left = 254
+      Height = 15
+      Top = 185
+      Width = 102
+      BorderSpacing.Left = 8
+      Caption = 'Repeated Measures'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Label1
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = AInBtn
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 272
+      Top = 17
+      Width = 210
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = CListSelectionChange
+      TabOrder = 0
+    end
+    object AInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = VarList
+      Left = 218
+      Height = 28
+      Top = 17
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = AInBtnClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object AOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = AInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 218
+      Height = 28
+      Top = 49
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = AOutBtnClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object BInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = AOutBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 218
+      Height = 28
+      Top = 101
+      Width = 28
+      BorderSpacing.Top = 24
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = BInBtnClick
+      Spacing = 0
+      TabOrder = 4
+    end
+    object BOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = BInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 218
+      Height = 28
+      Top = 133
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = BOutBtnClick
+      Spacing = 0
+      TabOrder = 5
+    end
+    object CInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = BOutBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 218
+      Height = 28
+      Top = 185
+      Width = 28
+      BorderSpacing.Top = 24
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = CInBtnClick
+      Spacing = 0
+      TabOrder = 7
+    end
+    object COutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = CInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 218
+      Height = 28
+      Top = 217
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = COutBtnClick
+      Spacing = 0
+      TabOrder = 8
+    end
+    object ACodes: TEdit
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = AOutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 254
+      Height = 23
+      Top = 42
+      Width = 211
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      OnChange = ACodesChange
+      ReadOnly = True
+      TabOrder = 3
+      Text = 'ACodes'
+    end
+    object BCodes: TEdit
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = BOutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 254
+      Height = 23
+      Top = 126
+      Width = 211
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      OnChange = ACodesChange
+      ReadOnly = True
+      TabOrder = 6
+      Text = 'BCodes'
+    end
+    object CList: TListBox
+      AnchorSideLeft.Control = AInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = Label4
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 254
+      Height = 85
+      Top = 202
+      Width = 211
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 2
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = CListSelectionChange
+      TabOrder = 9
+    end
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/ancovaunit.lfm

@@ -0,0 +1,633 @@
+object ANCOVAfrm: TANCOVAfrm
+  Left = 505
+  Height = 525
+  Top = 250
+  Width = 486
+  Caption = 'Analysis of Covariance Using Multiple Regression Methods'
+  ClientHeight = 525
+  ClientWidth = 486
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel3
+    Left = 8
+    Height = 72
+    Top = 404
+    Width = 470
+    Anchors = [akLeft, akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 12
+    BorderSpacing.Right = 8
+    Caption = 'Output Options:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.HorizontalSpacing = 16
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 3
+    ClientHeight = 52
+    ClientWidth = 466
+    TabOrder = 1
+    object DescriptiveStats: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 127
+      Caption = 'Descriptive Statistics'
+      TabOrder = 0
+    end
+    object CorrelationMats: TCheckBox
+      AnchorSideTop.Side = asrBottom
+      Left = 155
+      Height = 19
+      Top = 6
+      Width = 169
+      Caption = 'Correlation Matrices'
+      TabOrder = 1
+    end
+    object PrintInverseMat: TCheckBox
+      AnchorSideTop.Side = asrBottom
+      Left = 340
+      Height = 19
+      Top = 6
+      Width = 119
+      Caption = 'Inverse of Matrices'
+      TabOrder = 2
+    end
+    object PlotMeans: TCheckBox
+      AnchorSideTop.Side = asrBottom
+      Left = 12
+      Height = 19
+      Top = 27
+      Width = 127
+      Caption = 'Plot Factor Means'
+      TabOrder = 3
+    end
+    object MultCompChk: TCheckBox
+      AnchorSideTop.Side = asrBottom
+      Left = 155
+      Height = 19
+      Top = 27
+      Width = 169
+      Caption = 'Show Multiple Comparisons'
+      TabOrder = 4
+    end
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
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+      Top = 270
+      Width = 182
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 2
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 9
+    end
+    object FixedList: TListBox
+      AnchorSideLeft.Control = FixedIn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = Label3
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 288
+      Height = 111
+      Top = 118
+      Width = 182
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 2
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 6
+    end
+    object Bevel2: TBevel
+      AnchorSideLeft.Control = VarList
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = FixedList
+      AnchorSideTop.Side = asrCenter
+      Left = 252
+      Height = 4
+      Top = 171
+      Width = 24
+      Shape = bsSpacer
+    end
+    object Bevel1: TBevel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      Left = 218
+      Height = 18
+      Top = 2
+      Width = 34
+      Shape = bsSpacer
+    end
+  end
+  object Panel2: TPanel
+    Left = 8
+    Height = 25
+    Top = 492
+    Width = 470
+    Align = alBottom
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    BevelOuter = bvNone
+    ClientHeight = 25
+    ClientWidth = 470
+    TabOrder = 2
+    object ResetBtn: TButton
+      AnchorSideTop.Control = Panel2
+      AnchorSideRight.Control = ComputeBtn
+      Left = 269
+      Height = 25
+      Top = 0
+      Width = 54
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Right = 8
+      Caption = 'Reset'
+      OnClick = ResetBtnClick
+      TabOrder = 1
+    end
+    object ComputeBtn: TButton
+      AnchorSideTop.Control = Panel2
+      AnchorSideRight.Control = CloseBtn
+      Left = 331
+      Height = 25
+      Top = 0
+      Width = 76
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Right = 8
+      Caption = 'Compute'
+      OnClick = ComputeBtnClick
+      TabOrder = 2
+    end
+    object CloseBtn: TButton
+      AnchorSideTop.Control = Panel2
+      AnchorSideRight.Control = Panel2
+      AnchorSideRight.Side = asrBottom
+      Left = 415
+      Height = 25
+      Top = 0
+      Width = 55
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      Caption = 'Close'
+      ModalResult = 11
+      TabOrder = 3
+    end
+    object HelpBtn: TButton
+      Tag = 103
+      AnchorSideTop.Control = Panel2
+      AnchorSideRight.Control = ResetBtn
+      Left = 210
+      Height = 25
+      Top = 0
+      Width = 51
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Left = 12
+      BorderSpacing.Right = 8
+      Caption = 'Help'
+      OnClick = HelpBtnClick
+      TabOrder = 0
+    end
+  end
+  object Bevel3: TBevel
+    Left = 0
+    Height = 8
+    Top = 476
+    Width = 486
+    Align = alBottom
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/axsanovaunit.lfm

@@ -0,0 +1,313 @@
+object AxSAnovaFrm: TAxSAnovaFrm
+  Left = 629
+  Height = 360
+  Top = 278
+  Width = 471
+  AutoSize = True
+  Caption = 'Treatments by Subjects ANOVA (AxS)'
+  ClientHeight = 360
+  ClientWidth = 471
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 51
+    Top = 260
+    Width = 282
+    Anchors = [akLeft, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 12
+    Caption = 'Option'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.HorizontalSpacing = 16
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 2
+    ClientHeight = 31
+    ClientWidth = 278
+    TabOrder = 1
+    object PlotChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 102
+      Caption = 'Plot Cell Means'
+      TabOrder = 0
+    end
+    object PosthocChk: TCheckBox
+      Left = 130
+      Height = 19
+      Top = 6
+      Width = 136
+      BorderSpacing.Left = 8
+      Caption = 'Posthoc Comparisons'
+      TabOrder = 1
+    end
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 258
+    Height = 25
+    Top = 327
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 3
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 320
+    Height = 25
+    Top = 327
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 4
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 404
+    Height = 25
+    Top = 327
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 5
+  end
+  object HelpBtn: TButton
+    Tag = 106
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 199
+    Height = 25
+    Top = 327
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 2
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 311
+    Width = 471
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = GroupBox1
+    Left = 8
+    Height = 240
+    Top = 8
+    Width = 455
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BevelOuter = bvNone
+    ClientHeight = 240
+    ClientWidth = 455
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Panel1
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 100
+      Caption = 'Available Variables:'
+      ParentColor = False
+    end
+    object Label2: TLabel
+      AnchorSideLeft.Control = DepInBtn
+      AnchorSideLeft.Side = asrBottom
+      Left = 249
+      Height = 15
+      Top = 25
+      Width = 77
+      BorderSpacing.Left = 8
+      Caption = 'Group Variable'
+      ParentColor = False
+    end
+    object Label3: TLabel
+      AnchorSideLeft.Control = DepInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = RepInBtn
+      Left = 249
+      Height = 15
+      Top = 106
+      Width = 102
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 5
+      Caption = 'Repeated Measures'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Label1
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = DepInBtn
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 223
+      Top = 17
+      Width = 205
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      Constraints.MinHeight = 220
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 0
+    end
+    object DepInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = VarList
+      Left = 213
+      Height = 28
+      Top = 17
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = DepInBtnClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object DepOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = DepInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 213
+      Height = 28
+      Top = 49
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = DepOutBtnClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object RepInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = DepOutBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 213
+      Height = 28
+      Top = 101
+      Width = 28
+      BorderSpacing.Top = 24
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = RepInBtnClick
+      Spacing = 0
+      TabOrder = 4
+    end
+    object RepOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = RepInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 213
+      Height = 28
+      Top = 133
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = RepOutBtnClick
+      Spacing = 0
+      TabOrder = 5
+    end
+    object GrpVar: TEdit
+      AnchorSideLeft.Control = DepInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 249
+      Height = 23
+      Top = 40
+      Width = 206
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Left = 8
+      OnChange = GrpVarChange
+      ReadOnly = True
+      TabOrder = 3
+      Text = 'GrpVar'
+    end
+    object RepList: TListBox
+      AnchorSideLeft.Control = DepInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = Label3
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 249
+      Height = 117
+      Top = 123
+      Width = 206
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 2
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 6
+    end
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/blkanovaunit.lfm

@@ -0,0 +1,750 @@
+object BlksAnovaFrm: TBlksAnovaFrm
+  Left = 853
+  Height = 454
+  Top = 256
+  Width = 742
+  AutoSize = True
+  Caption = 'One, Two or Three Way Analysis of Variance'
+  ClientHeight = 454
+  ClientWidth = 742
+  Constraints.MinHeight = 450
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 15
+    Top = 8
+    Width = 49
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Variables:'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = Fact1Grp
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideBottom.Control = Fact1Grp
+    Left = 441
+    Height = 15
+    Top = 76
+    Width = 68
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 8
+    Caption = 'Variable Type'
+    ParentColor = False
+  end
+  object Label3: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = OverallAlpha
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 386
+    Width = 147
+    BorderSpacing.Left = 8
+    Caption = 'Alpha Level for Overall Tests'
+    ParentColor = False
+  end
+  object Label4: TLabel
+    AnchorSideLeft.Control = OverallAlpha
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = PostAlpha
+    AnchorSideTop.Side = asrCenter
+    Left = 232
+    Height = 15
+    Top = 386
+    Width = 163
+    BorderSpacing.Left = 24
+    Caption = 'Alpha Level for Post-Hoc Tests:'
+    ParentColor = False
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Panel4
+    AnchorSideBottom.Control = OverallAlpha
+    Left = 8
+    Height = 349
+    Top = 25
+    Width = 201
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    ItemHeight = 0
+    OnSelectionChange = VarListSelectionChange
+    TabOrder = 0
+  end
+  object Fact1Grp: TRadioGroup
+    AnchorSideRight.Control = GroupBox1
+    AnchorSideBottom.Control = Panel2
+    AnchorSideBottom.Side = asrBottom
+    Left = 411
+    Height = 70
+    Top = 99
+    Width = 128
+    Anchors = [akRight, akBottom]
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Right = 8
+    Caption = 'Factor 1'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 50
+    ClientWidth = 124
+    Items.Strings = (
+      'Fixed Levels'
+      'Random Levels'
+    )
+    TabOrder = 3
+  end
+  object Fact2Grp: TRadioGroup
+    AnchorSideLeft.Control = Fact1Grp
+    AnchorSideRight.Control = Fact1Grp
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Panel3
+    AnchorSideBottom.Side = asrBottom
+    Left = 411
+    Height = 70
+    Top = 183
+    Width = 128
+    Anchors = [akLeft, akRight, akBottom]
+    AutoFill = True
+    AutoSize = True
+    Caption = 'Factor 2'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 50
+    ClientWidth = 124
+    Items.Strings = (
+      'Fixed Levels'
+      'Random Levels'
+    )
+    TabOrder = 5
+  end
+  object Fact3Grp: TRadioGroup
+    AnchorSideLeft.Control = Fact1Grp
+    AnchorSideRight.Control = Fact1Grp
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Panel4
+    AnchorSideBottom.Side = asrBottom
+    Left = 411
+    Height = 70
+    Top = 267
+    Width = 128
+    Anchors = [akLeft, akRight, akBottom]
+    AutoFill = True
+    AutoSize = True
+    Caption = 'Factor 3'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 50
+    ClientWidth = 124
+    Items.Strings = (
+      'Fixed Levels'
+      'Random Levels'
+    )
+    TabOrder = 7
+  end
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = GroupBox2
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 547
+    Height = 177
+    Top = 21
+    Width = 187
+    Anchors = [akTop, akLeft, akRight]
+    AutoSize = True
+    BorderSpacing.Right = 8
+    Caption = 'Post-Hoc Comparisons:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ClientHeight = 157
+    ClientWidth = 183
+    TabOrder = 8
+    object Scheffe: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 138
+      Caption = 'Scheffe'
+      TabOrder = 0
+    end
+    object TukeyHSD: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 27
+      Width = 138
+      Caption = 'Tukey HSD (= n''s)'
+      TabOrder = 1
+    end
+    object TukeyB: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 48
+      Width = 138
+      Caption = 'Tukey B (= n''s)'
+      TabOrder = 2
+    end
+    object TukeyKramer: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 69
+      Width = 138
+      Caption = 'Tukey-Kramer'
+      TabOrder = 3
+    end
+    object NewmanKeuls: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 90
+      Width = 138
+      Caption = 'Newman-Keuls (= n''s)'
+      TabOrder = 4
+    end
+    object Bonferoni: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 111
+      Width = 138
+      Caption = 'Bonferroni'
+      TabOrder = 5
+    end
+    object OrthoContrasts: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 132
+      Width = 138
+      Caption = 'Orthogonal Contrasts'
+      TabOrder = 6
+    end
+  end
+  object GroupBox2: TGroupBox
+    AnchorSideTop.Control = GroupBox1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 547
+    Height = 152
+    Top = 214
+    Width = 187
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 16
+    BorderSpacing.Right = 8
+    Caption = 'Options'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ClientHeight = 132
+    ClientWidth = 183
+    TabOrder = 9
+    object PlotMeans: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 159
+      Caption = 'Plot Means Using 3D bars'
+      TabOrder = 0
+    end
+    object Plot2DLines: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 27
+      Width = 159
+      Caption = 'Plot Means Using 2D Lines'
+      TabOrder = 1
+    end
+    object Plot3DLines: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 48
+      Width = 159
+      Caption = 'Plot Means Using 3D Lines'
+      TabOrder = 2
+    end
+    object Label5: TLabel
+      Left = 12
+      Height = 15
+      Top = 69
+      Width = 159
+      Caption = 'Corrections for unequal Var.'
+      ParentColor = False
+    end
+    object BrownForsythe: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 86
+      Width = 159
+      Caption = 'Brown-Forsythe for 1-way'
+      TabOrder = 3
+    end
+    object Welch: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 107
+      Width = 159
+      Caption = 'Welch for 1-way'
+      TabOrder = 4
+    end
+  end
+  object OverallAlpha: TEdit
+    AnchorSideLeft.Control = Label3
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideBottom.Control = Bevel1
+    Left = 163
+    Height = 23
+    Top = 382
+    Width = 45
+    Alignment = taRightJustify
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    TabOrder = 10
+    Text = 'OverallAlpha'
+  end
+  object PostAlpha: TEdit
+    AnchorSideLeft.Control = Label4
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = OverallAlpha
+    AnchorSideTop.Side = asrCenter
+    Left = 403
+    Height = 23
+    Top = 382
+    Width = 51
+    Alignment = taRightJustify
+    BorderSpacing.Left = 8
+    TabOrder = 11
+    Text = 'PostAlpha'
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 521
+    Height = 25
+    Top = 421
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 13
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 587
+    Height = 25
+    Top = 421
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 14
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 675
+    Height = 25
+    Top = 421
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 15
+  end
+  object HelpBtn: TButton
+    Tag = 107
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 458
+    Height = 25
+    Top = 421
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 12
+  end
+  object Panel1: TPanel
+    AnchorSideTop.Control = VarList
+    AnchorSideRight.Control = Panel3
+    AnchorSideRight.Side = asrBottom
+    Left = 217
+    Height = 60
+    Top = 25
+    Width = 186
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BevelOuter = bvNone
+    ClientHeight = 60
+    ClientWidth = 186
+    TabOrder = 1
+    object DepIn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Panel1
+      Left = 0
+      Height = 28
+      Top = 0
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = DepInClick
+      Spacing = 0
+      TabOrder = 0
+    end
+    object DepOut: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = DepIn
+      AnchorSideTop.Side = asrBottom
+      Left = 0
+      Height = 28
+      Top = 32
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = DepOutClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object StaticText1: TStaticText
+      AnchorSideLeft.Control = DepOut
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = DepVar
+      Left = 36
+      Height = 16
+      Top = 7
+      Width = 103
+      Anchors = [akLeft, akBottom]
+      AutoSize = True
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Dependent Variable'
+      TabOrder = 2
+    end
+    object DepVar: TEdit
+      AnchorSideLeft.Control = DepOut
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = DepOut
+      AnchorSideBottom.Side = asrBottom
+      Left = 36
+      Height = 23
+      Top = 25
+      Width = 150
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      Constraints.MinWidth = 150
+      OnChange = VarChange
+      ReadOnly = True
+      TabOrder = 3
+      Text = 'DepVar'
+    end
+  end
+  object Panel2: TPanel
+    AnchorSideTop.Control = Panel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Fact1Grp
+    Left = 217
+    Height = 60
+    Top = 109
+    Width = 186
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 24
+    BorderSpacing.Right = 8
+    BevelOuter = bvNone
+    ClientHeight = 60
+    ClientWidth = 186
+    TabOrder = 2
+    object Fact1In: TBitBtn
+      AnchorSideLeft.Control = Panel2
+      AnchorSideTop.Control = Panel2
+      Left = 0
+      Height = 28
+      Top = 0
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = Fact1InClick
+      Spacing = 0
+      TabOrder = 0
+    end
+    object Fact1Out: TBitBtn
+      AnchorSideLeft.Control = Panel2
+      AnchorSideTop.Control = Fact1In
+      AnchorSideTop.Side = asrBottom
+      Left = 0
+      Height = 28
+      Top = 32
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = Fact1OutClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object StaticText2: TStaticText
+      AnchorSideLeft.Control = Factor1
+      AnchorSideBottom.Control = Factor1
+      Left = 36
+      Height = 16
+      Top = 7
+      Width = 87
+      Anchors = [akLeft, akBottom]
+      AutoSize = True
+      BorderSpacing.Bottom = 2
+      Caption = 'Factor 1 Variable'
+      TabOrder = 2
+    end
+    object Factor1: TEdit
+      AnchorSideLeft.Control = Fact1Out
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel2
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Fact1Out
+      AnchorSideBottom.Side = asrBottom
+      Left = 36
+      Height = 23
+      Top = 25
+      Width = 150
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      Constraints.MinWidth = 150
+      OnChange = VarChange
+      ReadOnly = True
+      TabOrder = 3
+      Text = 'Edit1'
+    end
+  end
+  object Panel3: TPanel
+    AnchorSideTop.Control = Panel2
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Fact2Grp
+    Left = 217
+    Height = 60
+    Top = 193
+    Width = 186
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 24
+    BorderSpacing.Right = 8
+    BevelOuter = bvNone
+    ClientHeight = 60
+    ClientWidth = 186
+    TabOrder = 4
+    object Fact2In: TBitBtn
+      AnchorSideLeft.Control = Panel3
+      AnchorSideTop.Control = Panel3
+      Left = 0
+      Height = 28
+      Top = 0
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = Fact2InClick
+      Spacing = 0
+      TabOrder = 0
+    end
+    object Fact2Out: TBitBtn
+      AnchorSideLeft.Control = Panel3
+      AnchorSideTop.Control = Fact2In
+      AnchorSideTop.Side = asrBottom
+      Left = 0
+      Height = 28
+      Top = 32
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = Fact2OutClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object StaticText3: TStaticText
+      AnchorSideLeft.Control = Fact2In
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = Factor2
+      Left = 36
+      Height = 16
+      Top = 7
+      Width = 87
+      Anchors = [akLeft, akBottom]
+      AutoSize = True
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Factor 2 Variable'
+      TabOrder = 2
+    end
+    object Factor2: TEdit
+      AnchorSideLeft.Control = Fact2In
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel3
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Fact2Out
+      AnchorSideBottom.Side = asrBottom
+      Left = 36
+      Height = 23
+      Top = 25
+      Width = 150
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      Constraints.MinWidth = 150
+      OnChange = VarChange
+      ReadOnly = True
+      TabOrder = 3
+      Text = 'Edit1'
+    end
+  end
+  object Panel4: TPanel
+    AnchorSideLeft.Control = Panel1
+    AnchorSideTop.Control = Panel3
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Fact3Grp
+    Left = 217
+    Height = 60
+    Top = 277
+    Width = 186
+    Anchors = [akTop, akLeft, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 24
+    BorderSpacing.Right = 8
+    BevelOuter = bvNone
+    ClientHeight = 60
+    ClientWidth = 186
+    TabOrder = 6
+    object Fact3In: TBitBtn
+      AnchorSideLeft.Control = Panel4
+      AnchorSideTop.Control = Panel4
+      Left = 0
+      Height = 28
+      Top = 0
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = Fact3InClick
+      Spacing = 0
+      TabOrder = 0
+    end
+    object Fact3Out: TBitBtn
+      AnchorSideLeft.Control = Panel4
+      AnchorSideTop.Control = Fact3In
+      AnchorSideTop.Side = asrBottom
+      Left = 0
+      Height = 28
+      Top = 32
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = Fact3OutClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object StaticText4: TStaticText
+      AnchorSideLeft.Control = Fact3In
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = Factor3
+      Left = 36
+      Height = 16
+      Top = 7
+      Width = 72
+      Anchors = [akLeft, akBottom]
+      AutoSize = True
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Factor 3 Clark'
+      TabOrder = 2
+    end
+    object Factor3: TEdit
+      AnchorSideLeft.Control = Fact3In
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel4
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Fact3Out
+      AnchorSideBottom.Side = asrBottom
+      Left = 36
+      Height = 23
+      Top = 25
+      Width = 150
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      OnChange = VarChange
+      ReadOnly = True
+      TabOrder = 3
+      Text = 'Edit1'
+    end
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 405
+    Width = 742
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/bnestaunit.lfm

@@ -0,0 +1,370 @@
+object BNestedAForm: TBNestedAForm
+  Left = 768
+  Height = 498
+  Top = 238
+  Width = 488
+  AutoSize = True
+  Caption = 'Factor B Nested in Factor A Analysis of Variance'
+  ClientHeight = 498
+  ClientWidth = 488
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = ResetBtnClick
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Memo1
+    AnchorSideTop.Side = asrBottom
+    Left = 8
+    Height = 15
+    Top = 114
+    Width = 100
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 16
+    Caption = 'Available Variables:'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = AInBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideBottom.Control = ACodes
+    Left = 266
+    Height = 15
+    Top = 138
+    Width = 88
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Bottom = 2
+    Caption = 'Factor A Variable'
+    ParentColor = False
+  end
+  object Label3: TLabel
+    AnchorSideLeft.Control = BInBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideBottom.Control = BCodes
+    Left = 266
+    Height = 15
+    Top = 222
+    Width = 115
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Bottom = 2
+    Caption = 'Factor B (Nested in A)'
+    ParentColor = False
+  end
+  object Label4: TLabel
+    AnchorSideLeft.Control = DepInBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideBottom.Control = DepEdit
+    Left = 266
+    Height = 15
+    Top = 317
+    Width = 102
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Bottom = 2
+    Caption = 'Dependent Variable'
+    ParentColor = False
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = AInBtn
+    AnchorSideBottom.Control = OptionsBox
+    Left = 9
+    Height = 239
+    Top = 130
+    Width = 213
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 9
+    BorderSpacing.Top = 1
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    ItemHeight = 0
+    MultiSelect = True
+    OnSelectionChange = VarListSelectionChange
+    TabOrder = 0
+  end
+  object AInBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = VarList
+    Left = 230
+    Height = 28
+    Top = 130
+    Width = 28
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = AInBtnClick
+    Spacing = 0
+    TabOrder = 1
+  end
+  object AOutBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = AInBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 230
+    Height = 28
+    Top = 162
+    Width = 28
+    BorderSpacing.Top = 4
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = AOutBtnClick
+    Spacing = 0
+    TabOrder = 2
+  end
+  object BInBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = AOutBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 230
+    Height = 28
+    Top = 214
+    Width = 28
+    BorderSpacing.Top = 24
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = BInBtnClick
+    Spacing = 0
+    TabOrder = 4
+  end
+  object BOutBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = BInBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 230
+    Height = 28
+    Top = 246
+    Width = 28
+    BorderSpacing.Top = 4
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = BOutBtnClick
+    Spacing = 0
+    TabOrder = 5
+  end
+  object DepInBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = RandomBChk
+    AnchorSideTop.Side = asrBottom
+    Left = 230
+    Height = 28
+    Top = 309
+    Width = 28
+    BorderSpacing.Top = 8
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = DepInBtnClick
+    Spacing = 0
+    TabOrder = 8
+  end
+  object DepOutBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = DepInBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 230
+    Height = 28
+    Top = 341
+    Width = 28
+    BorderSpacing.Top = 4
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = DepOutBtnClick
+    Spacing = 0
+    TabOrder = 9
+  end
+  object ACodes: TEdit
+    AnchorSideLeft.Control = AInBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = AOutBtn
+    AnchorSideBottom.Side = asrBottom
+    Left = 266
+    Height = 23
+    Top = 155
+    Width = 214
+    Anchors = [akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 12
+    ReadOnly = True
+    TabOrder = 3
+    Text = 'ACodes'
+  end
+  object BCodes: TEdit
+    AnchorSideLeft.Control = BInBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = BOutBtn
+    AnchorSideBottom.Side = asrBottom
+    Left = 266
+    Height = 23
+    Top = 239
+    Width = 214
+    Anchors = [akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 12
+    ReadOnly = True
+    TabOrder = 6
+    Text = 'BCodes'
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 275
+    Height = 25
+    Top = 465
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 12
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 337
+    Height = 25
+    Top = 465
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 13
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 421
+    Height = 25
+    Top = 465
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 14
+  end
+  object DepEdit: TEdit
+    AnchorSideLeft.Control = DepInBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = DepOutBtn
+    AnchorSideBottom.Side = asrBottom
+    Left = 266
+    Height = 23
+    Top = 334
+    Width = 214
+    Anchors = [akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 12
+    ReadOnly = True
+    TabOrder = 10
+    Text = 'DepEdit'
+  end
+  object OptionsBox: TRadioGroup
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 72
+    Top = 377
+    Width = 466
+    Anchors = [akLeft, akBottom]
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Left = 8
+    Caption = 'OptionsBox'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.HorizontalSpacing = 16
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 2
+    ClientHeight = 52
+    ClientWidth = 462
+    Columns = 2
+    Items.Strings = (
+      'Plot means using 2D Horizontal Bars'
+      'Plot means using 3D Horizontal Bars'
+      'Plot means using 2D Vertical Bars'
+      'Plot means using 3D Vertical Bars'
+    )
+    TabOrder = 11
+  end
+  object RandomBChk: TCheckBox
+    AnchorSideLeft.Control = BCodes
+    AnchorSideTop.Control = BOutBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 266
+    Height = 19
+    Top = 282
+    Width = 136
+    BorderSpacing.Top = 8
+    Caption = 'B is random, not fixed'
+    TabOrder = 7
+  end
+  object Memo1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 8
+    Height = 90
+    Top = 8
+    Width = 472
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'Directions:  This analysis assumes that levels of Factor B are Nested within levels of Factor A. Unless otherwise specified, it is assumed that Factors A and B are fixed level factors.  If Factor B is a random variable, check the provided box to indicate this.'#13#10#13#10'The number of cases for each B group should be equal and the number of B treatements in each A level should be equal.'
+    ParentColor = False
+    WordWrap = True
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 449
+    Width = 488
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/bnestaunit.pas

@@ -0,0 +1,601 @@
+unit BNestAUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Buttons, ExtCtrls,
+  MainUnit, OutputUnit, FunctionsLib, GraphLib, Globals;
+
+type
+
+  { TBNestedAForm }
+
+  TBNestedAForm = class(TForm)
+    ACodes: TEdit;
+    AInBtn: TBitBtn;
+    AOutBtn: TBitBtn;
+    BCodes: TEdit;
+    Bevel1: TBevel;
+    BInBtn: TBitBtn;
+    BOutBtn: TBitBtn;
+    Memo1: TLabel;
+    RandomBChk: TCheckBox;
+    DepInBtn: TBitBtn;
+    ComputeBtn: TButton;
+    DepOutBtn: TBitBtn;
+    DepEdit: TEdit;
+    Label1: TLabel;
+    Label2: TLabel;
+    Label3: TLabel;
+    Label4: TLabel;
+    OptionsBox: TRadioGroup;
+    ResetBtn: TButton;
+    CloseBtn: TButton;
+    VarList: TListBox;
+    procedure AInBtnClick(Sender: TObject);
+    procedure AOutBtnClick(Sender: TObject);
+    procedure BInBtnClick(Sender: TObject);
+    procedure BOutBtnClick(Sender: TObject);
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure DepInBtnClick(Sender: TObject);
+    procedure DepOutBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    SS, SumSqr, CellMeans, CellSDs : DblDyneMat;
+    CellCount : IntDyneMat;
+    ASS, BSS, ASumSqr, BSumSqr, AMeans, BMeans, ASDs : DblDyneVec;
+    ACount, BCount : IntDyneVec;
+    MinA, MinB, MaxA, MaxB, NoALevels, NoBLevels, ACol, BCol, YCol : integer;
+    DepVar, FactorA, FactorB : string;
+    SSTot, SumSqrTot, TotMean, MSTot, SSA, MSA, SSB, MSB, SSW, MSW : double;
+    TotN, dfA, dfBwA, dfwcell, dftotal : integer;
+
+    function GetVars: Boolean;
+    procedure GetMemory;
+    procedure GetSums;
+    procedure ShowMeans(AReport: TStrings);
+    procedure GetResults;
+    procedure ShowResults(AReport: TStrings);
+    procedure ReleaseMemory;
+    procedure TwoWayPlot;
+
+    procedure UpdateBtnStates;
+  public
+    { public declarations }
+  end; 
+
+var
+  BNestedAForm: TBNestedAForm;
+
+implementation
+
+uses
+  Math;
+
+{ TBNestedAForm }
+
+procedure TBNestedAForm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  VarList.Items.Clear;
+  ACodes.Text := '';
+  BCodes.Text := '';
+  DepEdit.Text := '';
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+end;
+
+procedure TBNestedAForm.AInBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if (index > -1) and (ACodes.Text = '') then
+  begin
+    ACodes.Text := VarList.Items[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TBNestedAForm.AOutBtnClick(Sender: TObject);
+begin
+  if ACodes.Text <> '' then
+  begin
+    VarList.Items.Add(ACodes.Text);
+    ACodes.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TBNestedAForm.BInBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if (index > -1) and (BCodes.Text = '') then
+  begin
+    BCodes.Text := VarList.Items[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TBNestedAForm.BOutBtnClick(Sender: TObject);
+begin
+  if BCodes.Text <> '' then
+  begin
+    VarList.Items.Add(BCodes.Text);
+    BCodes.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TBNestedAForm.ComputeBtnClick(Sender: TObject);
+var
+  lReport: TStrings;
+begin
+  lReport := TStringList.Create;
+  try
+    if GetVars then
+    begin
+      GetMemory;
+      GetSums;
+      ShowMeans(lReport);
+      GetResults;
+      ShowResults(lReport);
+      DisplayReport(lReport);
+      TwoWayPlot;
+      ReleaseMemory;
+    end;
+  finally
+    lReport.Free;
+  end;
+end;
+
+procedure TBNestedAForm.DepInBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if (index > -1) and (DepEdit.Text = '') then
+  begin
+    DepEdit.Text := VarList.Items[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TBNestedAForm.DepOutBtnClick(Sender: TObject);
+begin
+  if DepEdit.Text <>  '' then
+  begin
+    VarList.Items.Add(DepEdit.Text);
+    DepEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TBNestedAForm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  VarList.Constraints.MinHeight := DepOutBtn.Top + DepOutBtn.Height - VarList.Top;
+  Constraints.MinHeight := Height;
+  Constraints.MinWidth := Width;
+
+  FAutoSized := true;
+end;
+
+procedure TBNestedAForm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if GraphFrm = nil then
+    Application.CreateForm(TGraphFrm, GraphFrm);
+end;
+
+function TBNestedAForm.GetVars: Boolean;
+var
+  i, group : integer;
+  strvalue, cellstring : string;
+begin
+  Result := false;
+  DepVar := DepEdit.Text;
+  FactorA := ACodes.Text;
+  FactorB := BCodes.Text;
+  ACol := 0;
+  BCol := 0;
+  YCol := 0;
+  MinA := 1000;
+  MaxA := -1000;
+  MinB := 1000;
+  MaxB := -1000;
+  for i := 1 to NoVariables do
+      begin
+        strvalue := Trim(OS3MainFrm.DataGrid.Cells[i,0]);
+        if FactorA = strvalue then ACol := i;
+        if FactorB = strvalue then BCol := i;
+        if DepVar = strvalue then YCol := i;
+      end;
+  if (ACol = 0) or (BCol = 0) or (YCol = 0) then
+     begin
+          MessageDlg('Select a variable for each entry box.', mtError, [mbOK], 0);
+          exit;
+     end;
+  // get number of levels for Factors
+  for i := 1 to NoCases do
+      begin
+        cellstring := Trim(OS3MainFrm.DataGrid.Cells[ACol,i]);
+        group := round(StrToFloat(cellstring));
+        if (group > MaxA) then MaxA := group;
+        if (group < MinA) then MinA := group;
+        cellstring := Trim(OS3MainFrm.DataGrid.Cells[BCol,i]);
+        group := round(StrToFLoat(cellstring));
+        if (group > MaxB) then MaxB := group;
+        if (group < MinB) then MinB := group;
+      end;
+  NoALevels := MaxA - MinA + 1;
+  NoBLevels := MaxB - MinB + 1;
+
+  Result := true;
+end;
+
+procedure TBNestedAForm.GetMemory;
+begin
+  SetLength(SS,NoBLevels,NoALevels);
+  SetLength(SumSqr,NoBLevels,NoALevels);
+  SetLength(CellCount,NoBLevels,NoALevels);
+  SetLength(CellMeans,NoBLevels,NoALevels);
+  SetLength(CellSDs,NoBLevels,NoALevels);
+  SetLength(ASS,NoALevels);
+  SetLength(BSS,NoBLevels);
+  SetLength(ASumSqr,NoALevels);
+  SetLength(BSumSqr,NoBLevels);
+  SetLength(AMeans,NoALevels);
+  SetLength(BMeans,NoBLevels);
+  SetLength(ACount,NoALevels);
+  SetLength(BCount,NoBLevels);
+  SetLength(ASDs,NoALevels);
+end;
+
+procedure TBNestedAForm.GetSums;
+VAR
+  Aindex, Bindex, i, j : integer;
+  YValue : double;
+  strvalue : string;
+begin
+  // initialize memory
+  for i := 0 to NoBLevels-1 do
+      begin
+           for j := 0 to NoALevels-1 do
+               begin
+                  SS[i,j] := 0.0;
+                  SumSqr[i,j] := 0.0;
+                  CellCount[i,j] := 0;
+               end;
+      end;
+  for i := 0 to NoALevels-1 do
+      begin
+         ACount[i] := 0;
+         AMeans[i] := 0.0;
+         ASS[i] := 0.0;
+         ASumSqr[i] := 0.0;
+      end;
+  for j := 0 to NoBLevels-1 do
+      begin
+         BCount[i] := 0;
+         BMeans[i] := 0.0;
+         BSS[i] := 0.0;
+         BSumSqr[i] := 0.0;
+      end;
+  // Accumulate sums and sums of squared values
+  for i := 1 to NoCases do
+      begin
+         strvalue := Trim(OS3MainFrm.DataGrid.Cells[ACol,i]);
+         Aindex := round(StrToFloat(strvalue));
+         strvalue := Trim(OS3MainFrm.DataGrid.Cells[BCol,i]);
+         Bindex := round(StrToFloat(strvalue));
+         strvalue := Trim(OS3MainFrm.DataGrid.Cells[YCol,i]);
+         YValue := StrToFloat(strvalue);
+         Aindex := Aindex - MinA;
+         Bindex := Bindex - MinB;
+         SS[Bindex,Aindex] := SS[Bindex,Aindex] + YValue * YValue;
+         SumSqr[Bindex,Aindex] := SumSqr[Bindex,Aindex] + YValue;
+         CellCount[Bindex,Aindex] := CellCount[Bindex,Aindex] + 1;
+         ACount[Aindex] := ACount[Aindex] + 1;
+         BCount[Bindex] := BCount[Bindex] + 1;
+         ASS[Aindex] := ASS[Aindex] + YValue * YValue;
+         BSS[Bindex] := BSS[Bindex] + YValue * YValue;
+         ASumSqr[Aindex] := ASumSqr[Aindex] + YValue;
+         BSumSqr[Bindex] := BSumSqr[Bindex] + YValue;
+         SSTot := SSTot + YValue * YValue;
+         SumSqrTot := SumSqrTot + YValue;
+         TotN := TotN + 1;
+      end;
+  //get cell means and marginal means, SDs plus square of sums
+  for i := 0 to NoBlevels-1 do
+      begin
+         for j := 0 to NoALevels-1 do
+             begin
+                if CellCount[i,j] > 0 then
+                   begin
+                     CellMeans[i,j] := SumSqr[i,j] / CellCount[i,j];
+                     SumSqr[i,j] := SumSqr[i,j] * SumSqr[i,j];
+                     CellSDs[i,j] := SS[i,j] - (SumSqr[i,j] / CellCount[i,j]);
+                     CellSDs[i,j] := CellSDs[i,j] / (CellCount[i,j] - 1);
+                     CellSDs[i,j] := Sqrt(CellSDs[i,j]);
+                   end;
+             end;
+      end;
+  for i := 0 to NoBLevels-1 do
+      begin
+         BMeans[i] := BSumSqr[i] / BCount[i];
+         BSumSqr[i] := BSumSqr[i] * BSumSqr[i];
+      end;
+  for i := 0 to NoALevels-1 do
+      begin
+         AMeans[i] := ASumSqr[i] / ACount[i];
+         ASumSqr[i] := ASumSqr[i] * ASumSqr[i];
+         ASDs[i] := ASS[i] - (ASumSqr[i] / ACount[i]);
+         ASDs[i] := ASDs[i] / (ACount[i] - 1);
+         ASDs[i] := Sqrt(ASDs[i]);
+      end;
+  TotMean := SumSqrTot / TotN;
+  SumSqrTot := SumSqrTot * SumSqrTot;
+end;
+
+procedure TBNestedAForm.ShowMeans(AReport: TStrings);
+var
+  i, j: integer;
+begin
+  AReport.Add('NESTED ANOVA by Bill Miller');
+  AReport.Add('');
+  AReport.Add('File Analyzed: %s', [OS3MainFrm.FileNameEdit.Text]);
+  AReport.Add('');
+  AReport.Add('CELL MEANS');
+  AReport.Add('A LEVEL     BLEVEL         MEAN       STD.DEV.');
+  for i := 0 to NoALevels-1 do
+    for j := 0 to NoBLevels-1 do
+      if CellCount[j,i] > 0 then
+        AReport.Add('%5d     %5d        %10.3f     %10.3f', [i+MinA, j+MinB, CellMeans[j,i], CellSDs[j,i]]);
+  AReport.Add('');
+  AReport.Add('A MARGIN MEANS');
+  AReport.Add('A LEVEL       MEAN       STD.DEV.');
+  for i := 0 to NoALevels-1 do
+    AReport.Add('%5d     %10.3f       %10.3f', [i+MinA, AMeans[i], ASDs[i]]);
+  AReport.Add('');
+  AReport.Add('GRAND MEAN: %0.3f', [TotMean]);
+  AReport.Add('');
+  AReport.Add('');
+end;
+
+procedure TBNestedAForm.GetResults;
+VAR
+  temp, constant : double;
+  NoBLevelsInA, BLevCount, i, j, celln : integer;
+begin
+  celln := 0;
+  for i := 0 to NoALevels-1 do
+      begin
+         for j := 0 to NoBLevels-1 do
+             begin
+                if CellCount[j,i] > celln then celln := CellCount[j,i];
+             end;
+      end;
+  // assume all cells have same n size
+  // get no. of levels in A
+  BLevCount := 0;
+  for i := 0 to NoALevels-1 do
+      begin
+         NoBLevelsInA := 0;
+         for j := 0 to NoBLevels-1 do
+             begin
+                if CellCount[j,i] > 0 then NoBLevelsInA := NoBLevelsInA + 1;
+             end;
+         if NoBLevelsInA > BLevCount then BLevCount := NoBLevelsInA;
+      end;
+  dfA := NoALevels - 1;
+  dfBwA := NoALevels * (BLevCount - 1);
+  dfwcell := NoALevels * BLevCount * (celln - 1);
+  dftotal := TotN - 1;
+  constant := SumSqrTot / TotN;
+  SSTot := SSTot - constant;
+  MSTot := SSTot / dftotal;
+  SSA := 0.0;
+  for i := 0 to NoALevels-1 do SSA := SSA + (ASumSqr[i] / ACount[i]);
+  temp := SSA;
+  SSA := SSA - constant;
+  MSA := SSA / dfA;
+  SSB := 0.0;
+  for i := 0 to NoALevels - 1 do
+      begin
+         for j := 0 to NoBLevels-1 do
+             begin
+                if CellCount[j,i] > 0 then SSB := SSB + (SumSqr[j,i] / CellCount[j,i]);
+             end;
+      end;
+  SSB := SSB - temp;
+  MSB := SSB / dfBwA;
+  SSW := SSTot - SSA - SSB;
+  MSW := SSW / dfwcell;
+ (*
+  OutputFrm.RichEdit.Clear;
+  strvalue := format('SSA = %10.3f  MSA = %10.3f  SSB = %10.3f  MSB = %10.3f',
+     [SSA,MSA,SSB,MSB]);
+  OutputFrm.RichEdit.Lines.Add(strvalue);
+  strvalue := format('SSW = %10.3f  MSW = %10.3f',[SSW,MSW]);
+  OutputFrm.RichEdit.Lines.Add(strvalue);
+  OutputFrm.ShowModal;
+*)
+end;
+
+procedure TBNestedAForm.ShowResults(AReport: TStrings);
+var
+  F, PF: double;
+begin
+  AReport.Add('ANOVA TABLE');
+  AReport.Add('SOURCE     D.F.        SS        MS        F         PROB.');
+
+  if RandomBChk.Checked then
+  begin
+    F := MSA / MSB;
+    PF := probf(F, dfA, dfBwA);
+  end else
+  begin
+    F := MSA / MSW;
+    PF := probf(F, dfA, dfwcell);
+  end;
+  AReport.Add('A         %4d  %10.3f%10.3f%10.3f%10.3f', [dfA, SSA, MSA, F, PF]);
+
+  F := MSB / MSW;
+  PF := probf(F,dfBwA,dfwcell);
+  AReport.Add('B(W)      %4d  %10.3f%10.3f%10.3f%10.3f', [dfBwA, SSB, MSB, F, PF]);
+
+  AReport.Add('w.cells   %4d  %10.3f%10.3f', [dfwcell, SSW, MSW]);
+  AReport.Add('Total     %4d  %10.3f', [dftotal, SSTot]);
+end;
+
+procedure TBNestedAForm.ReleaseMemory;
+begin
+  ASDs := nil;
+  BCount := nil;
+  ACount := nil;
+  BMeans := nil;
+  AMeans := nil;
+  BSumSqr := nil;
+  ASumSqr := nil;
+  BSS := nil;
+  ASS := nil;
+  CellSDs := nil;
+  CellMeans := nil;
+  CellCount := nil;
+  SumSqr := nil;
+  SS := nil;
+end;
+
+procedure TBNestedAForm.TwoWayPlot;
+VAR
+  plottype, i: integer;
+  maxmean: double;
+  title: string;
+  XValue : DblDyneVec;
+begin
+  case OptionsBox.ItemIndex of
+    0: plotType := 9;
+    1: plotType := 10;
+    2: plotType := 1;
+    3: plotType := 2;
+    else raise Exception.Create('Plot type not supported.');
+  end;
+
+  GraphFrm.SetLabels[1] := 'FACTOR A';
+
+  maxmean := -1000.0;
+  SetLength(XValue,NoALevels+NoBLevels);
+  SetLength(GraphFrm.Xpoints,1,NoALevels);
+  SetLength(GraphFrm.Ypoints,1,NoALevels);
+  for i := 1 to NoALevels do
+      begin
+        GraphFrm.Ypoints[0,i-1] := AMeans[i-1];
+        if AMeans[i-1] > maxmean then maxmean := AMeans[i-1];
+        XValue[i-1] := MinA + i -1;
+        GraphFrm.Xpoints[0,i-1] := XValue[i-1];
+      end;
+  GraphFrm.nosets := 1;
+  GraphFrm.nbars := NoALevels;
+  GraphFrm.Heading := FactorA;
+  GraphFrm.XTitle := FactorA + ' Group Codes';
+  GraphFrm.YTitle := 'Mean';
+  GraphFrm.barwideprop := 0.5;
+  GraphFrm.AutoScaled := false;
+  GraphFrm.miny := 0.0;
+  GraphFrm.maxy := maxmean;
+  GraphFrm.GraphType := plottype;
+  GraphFrm.BackColor := clCream;
+  GraphFrm.WallColor := clDkGray;
+  GraphFrm.FloorColor := clLtGray;
+  GraphFrm.ShowBackWall := true;
+  GraphFrm.ShowModal;
+  GraphFrm.Xpoints := nil;
+  GraphFrm.Ypoints := nil;
+
+  // Factor B next
+  maxmean := 0.0;
+  GraphFrm.SetLabels[1] := 'FACTOR B';
+  SetLength(GraphFrm.Xpoints,1,NoBLevels);
+  SetLength(GraphFrm.Ypoints,1,NoBLevels);
+  for i := 1 to NoBLevels do
+      begin
+        GraphFrm.Ypoints[0,i-1] := BMeans[i-1];
+        if BMeans[i-1] > maxmean then maxmean := BMeans[i-1];
+        XValue[i-1] := MinB + i - 1;
+        GraphFrm.Xpoints[0,i-1] := XValue[i-1];
+      end;
+  GraphFrm.nosets := 1;
+  GraphFrm.nbars := NoBLevels;
+  GraphFrm.Heading := 'FACTOR B';
+  GraphFrm.XTitle := FactorB + ' Group Codes';
+  GraphFrm.YTitle := 'Mean';
+  GraphFrm.barwideprop := 0.5;
+  GraphFrm.AutoScaled := false;
+  GraphFrm.miny := 0.0;
+  GraphFrm.maxy := maxmean;
+  GraphFrm.GraphType := plottype;
+  GraphFrm.BackColor := clCream;
+  GraphFrm.WallColor := clDkGray;
+  GraphFrm.FloorColor := clLtGray;
+  GraphFrm.ShowBackWall := true;
+  GraphFrm.ShowModal;
+  GraphFrm.Xpoints := nil;
+  GraphFrm.Ypoints := nil;
+  XValue := nil;
+end;
+
+procedure TBNestedAForm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+procedure TBNestedAForm.UpdateBtnStates;
+var
+  i: Integer;
+  lSelected: Boolean;
+begin
+  lSelected := false;
+  for i := 0 to VarList.Items.Count-1 do
+    if VarList.Selected[i] then
+    begin
+      lSelected := true;
+      break;
+    end;
+
+  AInBtn.Enabled := lSelected and (ACodes.Text = '');
+  BInBtn.Enabled := lSelected and (BCodes.Text = '');
+  DepInBtn.Enabled := lSelected and (DepEdit.Text = '');
+  AOutBtn.Enabled := (ACodes.Text <> '');
+  BOutBtn.Enabled := (BCodes.Text <> '');
+  DepOutBtn.Enabled := (DepEdit.Text <> '');
+end;
+
+initialization
+  {$I bnestaunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/comparisons/latinspecsunit.lfm

@@ -0,0 +1,574 @@
+object LatinSpecsFrm: TLatinSpecsFrm
+  Left = 887
+  Height = 519
+  Top = 260
+  Width = 420
+  AutoSize = True
+  Caption = 'Latin Squares Analysis Specification Form'
+  ClientHeight = 519
+  ClientWidth = 420
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 15
+    Top = 8
+    Width = 67
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'File Variables'
+    ParentColor = False
+  end
+  object Label8: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = nPerCellEdit
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 491
+    Width = 66
+    BorderSpacing.Left = 8
+    Caption = 'No. per cell: '
+    ParentColor = False
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Panel7
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 445
+    Top = 25
+    Width = 232
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    Constraints.MinWidth = 150
+    ItemHeight = 0
+    TabOrder = 0
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = CancelBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 226
+    Height = 25
+    Top = 486
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 3
+  end
+  object CancelBtn: TButton
+    AnchorSideRight.Control = OKBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 292
+    Height = 25
+    Top = 486
+    Width = 62
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Cancel'
+    ModalResult = 2
+    TabOrder = 4
+  end
+  object OKBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 366
+    Height = 25
+    Top = 486
+    Width = 42
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'OK'
+    ModalResult = 1
+    OnClick = OKBtnClick
+    TabOrder = 5
+  end
+  object nPerCellEdit: TEdit
+    AnchorSideLeft.Control = Label8
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = OKBtn
+    AnchorSideTop.Side = asrCenter
+    AnchorSideRight.Side = asrBottom
+    Left = 82
+    Height = 23
+    Top = 487
+    Width = 48
+    Alignment = taRightJustify
+    BorderSpacing.Left = 8
+    TabOrder = 2
+    Text = 'nPerCellEdit'
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = OKBtn
+    Left = 0
+    Height = 8
+    Top = 470
+    Width = 420
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Panel7: TPanel
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = VarList
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel1
+    Left = 248
+    Height = 440
+    Top = 25
+    Width = 164
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Right = 8
+    BevelOuter = bvNone
+    ChildSizing.VerticalSpacing = 16
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsHomogenousChildResize
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 440
+    ClientWidth = 164
+    TabOrder = 1
+    object PanelA: TPanel
+      AnchorSideRight.Side = asrBottom
+      Left = 0
+      Height = 60
+      Top = 0
+      Width = 164
+      AutoSize = True
+      BevelOuter = bvNone
+      ClientHeight = 60
+      ClientWidth = 164
+      TabOrder = 0
+      object ACodeLabel: TLabel
+        AnchorSideLeft.Control = ACodeEdit
+        AnchorSideBottom.Control = ACodeEdit
+        Left = 37
+        Height = 15
+        Top = 8
+        Width = 119
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Factor A Code Variable'
+        ParentColor = False
+      end
+      object AInBtn: TBitBtn
+        AnchorSideLeft.Control = PanelA
+        AnchorSideTop.Control = PanelA
+        Left = 0
+        Height = 28
+        Top = 0
+        Width = 29
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = AInBtnClick
+        Spacing = 0
+        TabOrder = 0
+      end
+      object AOutBtn: TBitBtn
+        AnchorSideLeft.Control = PanelA
+        AnchorSideTop.Control = AInBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 0
+        Height = 28
+        Top = 32
+        Width = 29
+        BorderSpacing.Top = 4
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = AOutBtnClick
+        Spacing = 0
+        TabOrder = 1
+      end
+      object ACodeEdit: TEdit
+        AnchorSideLeft.Control = AInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = PanelA
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = AOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 37
+        Height = 23
+        Top = 25
+        Width = 127
+        Anchors = [akLeft, akRight, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        TabOrder = 2
+        Text = 'ACodeEdit'
+      end
+    end
+    object PanelB: TPanel
+      Left = 0
+      Height = 60
+      Top = 76
+      Width = 164
+      AutoSize = True
+      BevelOuter = bvNone
+      ClientHeight = 60
+      ClientWidth = 164
+      TabOrder = 1
+      object BCodeLabel: TLabel
+        AnchorSideLeft.Control = BCodeEdit
+        AnchorSideTop.Side = asrBottom
+        AnchorSideBottom.Control = BCodeEdit
+        Left = 37
+        Height = 15
+        Top = 8
+        Width = 118
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Factor B Code Variable'
+        ParentColor = False
+      end
+      object BInBtn: TBitBtn
+        AnchorSideLeft.Control = PanelB
+        AnchorSideTop.Control = PanelB
+        Left = 0
+        Height = 28
+        Top = 0
+        Width = 29
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = BInBtnClick
+        Spacing = 0
+        TabOrder = 0
+      end
+      object BOutBtn: TBitBtn
+        AnchorSideLeft.Control = PanelB
+        AnchorSideTop.Control = BInBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 0
+        Height = 28
+        Top = 32
+        Width = 29
+        BorderSpacing.Top = 4
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = BOutBtnClick
+        Spacing = 0
+        TabOrder = 1
+      end
+      object BCodeEdit: TEdit
+        AnchorSideLeft.Control = BInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = PanelB
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = BOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 37
+        Height = 23
+        Top = 25
+        Width = 127
+        Anchors = [akLeft, akRight, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        TabOrder = 2
+        Text = 'Edit1'
+      end
+    end
+    object PanelC: TPanel
+      Left = 0
+      Height = 60
+      Top = 152
+      Width = 164
+      AutoSize = True
+      BevelOuter = bvNone
+      ClientHeight = 60
+      ClientWidth = 164
+      TabOrder = 2
+      object CCodeLabel: TLabel
+        AnchorSideLeft.Control = CCodeEdit
+        AnchorSideBottom.Control = CCodeEdit
+        Left = 37
+        Height = 15
+        Top = 8
+        Width = 119
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Factor C Code Variable'
+        ParentColor = False
+      end
+      object CInBtn: TBitBtn
+        AnchorSideLeft.Control = PanelC
+        AnchorSideTop.Control = PanelC
+        Left = 0
+        Height = 28
+        Top = 0
+        Width = 29
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = CInBtnClick
+        Spacing = 0
+        TabOrder = 0
+      end
+      object COutBtn: TBitBtn
+        AnchorSideLeft.Control = PanelC
+        AnchorSideTop.Control = CInBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 0
+        Height = 28
+        Top = 32
+        Width = 29
+        BorderSpacing.Top = 4
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = COutBtnClick
+        Spacing = 0
+        TabOrder = 1
+      end
+      object CCodeEdit: TEdit
+        AnchorSideLeft.Control = CInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = PanelC
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = COutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 37
+        Height = 23
+        Top = 25
+        Width = 127
+        Anchors = [akLeft, akRight, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        TabOrder = 2
+        Text = 'Edit1'
+      end
+    end
+    object PanelD: TPanel
+      Left = 0
+      Height = 60
+      Top = 228
+      Width = 164
+      AutoSize = True
+      BevelOuter = bvNone
+      ClientHeight = 60
+      ClientWidth = 164
+      TabOrder = 3
+      object DCodeLabel: TLabel
+        AnchorSideLeft.Control = DCodeEdit
+        AnchorSideBottom.Control = DCodeEdit
+        Left = 45
+        Height = 15
+        Top = 8
+        Width = 119
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 2
+        Caption = 'Factor D Code Variable'
+        ParentColor = False
+      end
+      object DInBtn: TBitBtn
+        AnchorSideLeft.Control = PanelD
+        AnchorSideTop.Control = PanelD
+        Left = 0
+        Height = 28
+        Top = 0
+        Width = 29
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = DInBtnClick
+        Spacing = 0
+        TabOrder = 0
+      end
+      object DOutBtn: TBitBtn
+        AnchorSideLeft.Control = PanelD
+        AnchorSideTop.Control = DInBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 0
+        Height = 28
+        Top = 32
+        Width = 29
+        BorderSpacing.Top = 4
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = DOutBtnClick
+        Spacing = 0
+        TabOrder = 1
+      end
+      object DCodeEdit: TEdit
+        AnchorSideLeft.Control = DInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = PanelD
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = DOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 37
+        Height = 23
+        Top = 25
+        Width = 127
+        Anchors = [akLeft, akRight, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        TabOrder = 2
+        Text = 'Edit1'
+      end
+    end
+    object PanelGrp: TPanel
+      Left = 0
+      Height = 60
+      Top = 304
+      Width = 164
+      AutoSize = True
+      BevelOuter = bvNone
+      ClientHeight = 60
+      ClientWidth = 164
+      TabOrder = 4
+      object GrpCodeLabel: TLabel
+        AnchorSideLeft.Control = GrpCodeEdit
+        AnchorSideBottom.Control = GrpCodeEdit
+        Left = 37
+        Height = 15
+        Top = 8
+        Width = 108
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Group Code Variable'
+        ParentColor = False
+      end
+      object GrpInBtn: TBitBtn
+        AnchorSideLeft.Control = PanelGrp
+        AnchorSideTop.Control = PanelGrp
+        Left = 0
+        Height = 28
+        Top = 0
+        Width = 29
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = GrpInBtnClick
+        Spacing = 0
+        TabOrder = 0
+      end
+      object GrpOutBtn: TBitBtn
+        AnchorSideLeft.Control = PanelGrp
+        AnchorSideTop.Control = GrpInBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 0
+        Height = 28
+        Top = 32
+        Width = 29
+        BorderSpacing.Top = 4
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = GrpOutBtnClick
+        Spacing = 0
+        TabOrder = 1
+      end
+      object GrpCodeEdit: TEdit
+        AnchorSideLeft.Control = GrpInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = PanelGrp
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = GrpOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 37
+        Height = 23
+        Top = 25
+        Width = 127
+        Anchors = [akLeft, akRight, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        TabOrder = 2
+        Text = 'Edit1'
+      end
+    end
+    object PanelDep: TPanel
+      Left = 0
+      Height = 60
+      Top = 380
+      Width = 164
+      AutoSize = True
+      BevelOuter = bvNone
+      ClientHeight = 60
+      ClientWidth = 164
+      TabOrder = 5
+      object DepVarLabel: TLabel
+        AnchorSideLeft.Control = DepVarEdit
+        AnchorSideBottom.Control = DepVarEdit
+        Left = 37
+        Height = 15
+        Top = 8
+        Width = 102
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Dependent Variable'
+        ParentColor = False
+      end
+      object DataInBtn: TBitBtn
+        AnchorSideLeft.Control = PanelDep
+        AnchorSideTop.Control = PanelDep
+        Left = 0
+        Height = 28
+        Top = 0
+        Width = 29
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = DataInBtnClick
+        Spacing = 0
+        TabOrder = 0
+      end
+      object DataOutBtn: TBitBtn
+        AnchorSideLeft.Control = PanelDep
+        AnchorSideTop.Control = DataInBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 0
+        Height = 28
+        Top = 32
+        Width = 29
+        BorderSpacing.Top = 4
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = DataOutBtnClick
+        Spacing = 0
+        TabOrder = 1
+      end
+      object DepVarEdit: TEdit
+        AnchorSideLeft.Control = DataInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = PanelDep
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = DataOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 37
+        Height = 23
+        Top = 25
+        Width = 127
+        Anchors = [akLeft, akRight, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        TabOrder = 2
+        Text = 'Edit1'
+      end
+    end
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/latinspecsunit.pas

@@ -0,0 +1,273 @@
+unit LatinSpecsUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls, Buttons,
+  MainUnit, Globals;
+
+type
+
+  { TLatinSpecsFrm }
+
+  TLatinSpecsFrm = class(TForm)
+    AInBtn: TBitBtn;
+    nPerCellEdit: TEdit;
+    GrpOutBtn: TBitBtn;
+    DataInBtn: TBitBtn;
+    DataOutBtn: TBitBtn;
+    AOutBtn: TBitBtn;
+    BInBtn: TBitBtn;
+    BOutBtn: TBitBtn;
+    CInBtn: TBitBtn;
+    COutBtn: TBitBtn;
+    DInBtn: TBitBtn;
+    DOutBtn: TBitBtn;
+    GrpInBtn: TBitBtn;
+    Label8: TLabel;
+    PanelA: TPanel;
+    PanelB: TPanel;
+    PanelC: TPanel;
+    PanelD: TPanel;
+    PanelGrp: TPanel;
+    PanelDep: TPanel;
+    Panel7: TPanel;
+    ResetBtn: TButton;
+    CancelBtn: TButton;
+    OKBtn: TButton;
+    ACodeEdit: TEdit;
+    BCodeEdit: TEdit;
+    CCodeEdit: TEdit;
+    DCodeEdit: TEdit;
+    GrpCodeEdit: TEdit;
+    DepVarEdit: TEdit;
+    Label1: TLabel;
+    ACodeLabel: TLabel;
+    BCodeLabel: TLabel;
+    CCodeLabel: TLabel;
+    DCodeLabel: TLabel;
+    GrpCodeLabel: TLabel;
+    DepVarLabel: TLabel;
+    VarList: TListBox;
+    Bevel1: TBevel;
+    procedure AInBtnClick(Sender: TObject);
+    procedure AOutBtnClick(Sender: TObject);
+    procedure BInBtnClick(Sender: TObject);
+    procedure BOutBtnClick(Sender: TObject);
+    procedure CInBtnClick(Sender: TObject);
+    procedure COutBtnClick(Sender: TObject);
+    procedure DataInBtnClick(Sender: TObject);
+    procedure DataOutBtnClick(Sender: TObject);
+    procedure DInBtnClick(Sender: TObject);
+    procedure DOutBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure GrpInBtnClick(Sender: TObject);
+    procedure GrpOutBtnClick(Sender: TObject);
+    procedure OKBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    function Validate(out AMsg: String; out AControl: TWinControl): Boolean;
+  public
+    { public declarations }
+  end; 
+
+var
+  LatinSpecsFrm: TLatinSpecsFrm;
+
+implementation
+
+uses
+  Math,
+  LatinSqrsUnit;
+
+
+{ TLatinSpecsFrm }
+
+procedure TLatinSpecsFrm.ResetBtnClick(Sender: TObject);
+VAR i : integer;
+begin
+     VarList.Clear;
+     for i := 1 to NoVariables do
+         VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+end;
+
+procedure TLatinSpecsFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+  w := MaxValue([ResetBtn.Width, CancelBtn.Width, OKBtn.Width]);
+  ResetBtn.Constraints.MinWidth := w;
+  CancelBtn.Constraints.MinWidth := w;
+  OKBtn.Constraints.MinWidth := w;
+
+  VarList.Constraints.MinHeight := Panel7.Height;
+
+  Constraints.MinWidth := nPerCellEdit.Left + nPerCellEdit.Width + Width - ResetBtn.Left + ResetBtn.BorderSpacing.Left;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TLatinSpecsFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+end;
+
+procedure TLatinSpecsFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(Self);
+end;
+
+procedure TLatinSpecsFrm.GrpInBtnClick(Sender: TObject);
+VAR index : integer;
+begin
+     index := VarList.ItemIndex;
+     GrpCodeEdit.Text := VarList.Items.Strings[index];
+     VarList.Items.Delete(index);
+     GrpInBtn.Enabled := false;
+     GrpOutBtn.Enabled := true;
+end;
+
+procedure TLatinSpecsFrm.GrpOutBtnClick(Sender: TObject);
+begin
+     VarList.Items.Add(GrpCodeEdit.Text);
+     GrpCodeEdit.Text := '';
+     GrpInBtn.Enabled := true;
+     GrpOutBtn.Enabled := false;
+end;
+
+procedure TLatinSpecsFrm.AInBtnClick(Sender: TObject);
+VAR index : integer;
+begin
+     index := VarList.ItemIndex;
+     ACodeEdit.Text := VarList.Items.Strings[index];
+     VarList.Items.Delete(index);
+     AinBtn.Enabled := false;
+     AOutBtn.Enabled := true;
+end;
+
+procedure TLatinSpecsFrm.AOutBtnClick(Sender: TObject);
+begin
+     VarList.Items.Add(ACodeEdit.Text);
+     ACodeEdit.Text := '';
+     AinBtn.Enabled := true;
+     AOutBtn.Enabled := false;
+end;
+
+procedure TLatinSpecsFrm.BInBtnClick(Sender: TObject);
+VAR index : integer;
+begin
+     index := VarList.ItemIndex;
+     BCodeEdit.Text := VarList.Items.Strings[index];
+     VarList.Items.Delete(index);
+     BinBtn.Enabled := false;
+     BOutBtn.Enabled := true;
+end;
+
+procedure TLatinSpecsFrm.BOutBtnClick(Sender: TObject);
+begin
+     VarList.Items.Add(BCodeEdit.Text);
+     BCodeEdit.Text := '';
+     BinBtn.Enabled := true;
+     BOutBtn.Enabled := false;
+end;
+
+procedure TLatinSpecsFrm.CInBtnClick(Sender: TObject);
+VAR index : integer;
+begin
+     index := VarList.ItemIndex;
+     CCodeEdit.Text := VarList.Items.Strings[index];
+     VarList.Items.Delete(index);
+     CinBtn.Enabled := false;
+     COutBtn.Enabled := true;
+end;
+
+procedure TLatinSpecsFrm.COutBtnClick(Sender: TObject);
+begin
+     VarList.Items.Add(CCodeEdit.Text);
+     CCodeEdit.Text := '';
+     CinBtn.Enabled := true;
+     COutBtn.Enabled := false;
+end;
+
+procedure TLatinSpecsFrm.DataInBtnClick(Sender: TObject);
+VAR index : integer;
+begin
+     index := VarList.ItemIndex;
+     DepVarEdit.Text := VarList.Items.Strings[index];
+     VarList.Items.Delete(index);
+     DataInBtn.Enabled := false;
+     DataOutBtn.Enabled := true;
+end;
+
+procedure TLatinSpecsFrm.DataOutBtnClick(Sender: TObject);
+begin
+     VarList.Items.Add(DepVarEdit.Text);
+     DepVarEdit.Text := '';
+     DataInBtn.Enabled := true;
+     DataOutBtn.Enabled := false;
+end;
+
+procedure TLatinSpecsFrm.DInBtnClick(Sender: TObject);
+VAR index : integer;
+begin
+     index := VarList.ItemIndex;
+     DCodeEdit.Text := VarList.Items.Strings[index];
+     VarList.Items.Delete(index);
+     DinBtn.Enabled := false;
+     DOutBtn.Enabled := true;
+end;
+
+procedure TLatinSpecsFrm.DOutBtnClick(Sender: TObject);
+begin
+     VarList.Items.Add(DCodeEdit.Text);
+     DCodeEdit.Text := '';
+     DinBtn.Enabled := true;
+     DOutBtn.Enabled := false;
+end;
+
+procedure TLatinSpecsFrm.OKBtnClick(Sender: TObject);
+var
+  C: TWinControl;
+  msg: String;
+begin
+  if not Validate(msg, C) then begin
+    C.SetFocus;
+    MessageDlg(msg, mtError, [mbOK], 0);
+    ModalResult := mrNone;
+  end;
+end;
+
+function TLatinSpecsFrm.Validate(out AMsg: String; out AControl: TWinControl): Boolean;
+var
+  n: Integer;
+begin
+  Result := false;
+  if (nPerCellEdit.Text = '') then begin
+    AMsg := 'Please specify the number of cases per cell.';
+    AControl := nPercellEdit;
+    exit;
+  end;
+  if not TryStrToInt(nPercellEdit.Text, n) or (n <= 0) then begin
+    AMsg := 'Please specify a valid number for the cases per cell.';
+    AControl := nPercellEdit;
+    exit;
+  end;
+  Result := true;
+end;
+
+
+initialization
+  {$I latinspecsunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/comparisons/latinsqrsunit.lfm

@@ -0,0 +1,109 @@
+object LatinSqrsFrm: TLatinSqrsFrm
+  Left = 199
+  Height = 248
+  Top = 108
+  Width = 523
+  ActiveControl = Plan
+  AutoSize = True
+  BorderStyle = bsDialog
+  Caption = 'Latin and Greco-Latin Squares Analyses'
+  ClientHeight = 248
+  ClientWidth = 523
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object CancelBtn: TButton
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Plan
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = OKBtn
+    Left = 399
+    Height = 25
+    Top = 214
+    Width = 62
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Cancel'
+    ModalResult = 2
+    TabOrder = 2
+  end
+  object OKBtn: TButton
+    AnchorSideTop.Control = Plan
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 473
+    Height = 25
+    Top = 214
+    Width = 42
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'OK'
+    ModalResult = 1
+    OnClick = OKBtnClick
+    TabOrder = 3
+  end
+  object Plan: TRadioGroup
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 198
+    Top = 8
+    Width = 515
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'Winer''s Plans:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 178
+    ClientWidth = 511
+    Items.Strings = (
+      'Plan 1.   Three Factors (A,B,C) with no interactions.'
+      'Plan 2.   Four Factors (A,B,C,D) with partial interactions.'
+      'Plan 3.   Like Plan 2 but different assumptions (Partial confounding of interaction ABC.)'
+      'The Greco-Latin with no interactions assumed.'
+      'Plan 5.   Repeated measures Latin Square (random assignment of groups to rows.)'
+      'Plan 6.   Fractional replication of a three factor factorial experiment in incomplete blocks.'
+      'Plan 7.   Plan 5 with superimposing of an orthogonal Latin square.'
+      'Plan 9.   AxBxC (same square used for all levels of Factor C.)'
+    )
+    OnClick = PlanClick
+    TabOrder = 0
+  end
+  object HelpBtn: TButton
+    Tag = 130
+    AnchorSideTop.Control = Plan
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = CancelBtn
+    Left = 340
+    Height = 25
+    Top = 214
+    Width = 51
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 1
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/onecaseanovaunit.lfm

@@ -0,0 +1,583 @@
+object OneCaseAnovaForm: TOneCaseAnovaForm
+  Left = 694
+  Height = 458
+  Top = 246
+  Width = 567
+  AutoSize = True
+  Caption = 'OneCaseAnovaForm'
+  ClientHeight = 458
+  ClientWidth = 567
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = PlotOptionsBox
+    AnchorSideTop.Control = PlotOptionsBox
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = PlotOptionsBox
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = OverAllAlpha
+    Left = 364
+    Height = 135
+    Top = 146
+    Width = 195
+    Anchors = [akTop, akLeft, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 16
+    BorderSpacing.Bottom = 8
+    Caption = 'Post-Hoc Comparisons:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsHomogenousChildResize
+    ChildSizing.ShrinkVertical = crsHomogenousChildResize
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 115
+    ClientWidth = 191
+    TabOrder = 2
+    object ScheffeChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 167
+      Caption = 'ScheffeChk'
+      TabOrder = 0
+    end
+    object TukeyHSDChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 27
+      Width = 167
+      Caption = 'Tukey HSD (= n''s)'
+      TabOrder = 1
+    end
+    object TukeyBChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 48
+      Width = 167
+      Caption = 'Tukey B (= n''s)'
+      TabOrder = 2
+    end
+    object TukeyKramerChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 69
+      Width = 167
+      Caption = 'Tukey-Kramer'
+      TabOrder = 3
+    end
+    object NewmanKeulsChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 90
+      Width = 167
+      Caption = 'Newman-Keuls (= n''s)'
+      TabOrder = 4
+    end
+  end
+  object Label3: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = OverAllAlpha
+    AnchorSideTop.Side = asrCenter
+    AnchorSideRight.Control = OverAllAlpha
+    Left = 8
+    Height = 15
+    Top = 390
+    Width = 147
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    Caption = 'Alpha Level for Overall Tests'
+    ParentColor = False
+  end
+  object OverAllAlpha: TEdit
+    AnchorSideLeft.Control = Label3
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideRight.Control = PostAlpha
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel1
+    Left = 163
+    Height = 23
+    Top = 386
+    Width = 51
+    Alignment = taRightJustify
+    Anchors = [akLeft, akBottom]
+    TabOrder = 4
+    Text = 'OverAllAlpha'
+  end
+  object Label4: TLabel
+    AnchorSideLeft.Control = OverAllAlpha
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = PostAlpha
+    AnchorSideTop.Side = asrCenter
+    AnchorSideRight.Control = PostAlpha
+    Left = 238
+    Height = 15
+    Top = 390
+    Width = 163
+    BorderSpacing.Left = 24
+    BorderSpacing.Right = 8
+    Caption = 'Alpha Level for Post-Hoc Tests:'
+    ParentColor = False
+  end
+  object PostAlpha: TEdit
+    AnchorSideLeft.Control = Label4
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Side = asrCenter
+    AnchorSideBottom.Control = Bevel1
+    Left = 409
+    Height = 23
+    Top = 386
+    Width = 51
+    Alignment = taRightJustify
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    TabOrder = 5
+    Text = 'PostAlpha'
+  end
+  object HelpBtn: TButton
+    Tag = 107
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 295
+    Height = 25
+    Top = 425
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 6
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 354
+    Height = 25
+    Top = 425
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 7
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 416
+    Height = 25
+    Top = 425
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 8
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 500
+    Height = 25
+    Top = 425
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 9
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 409
+    Width = 567
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object InteractBtn: TCheckBox
+    AnchorSideLeft.Control = GroupBox1
+    AnchorSideTop.Control = GroupBox1
+    AnchorSideTop.Side = asrBottom
+    Left = 380
+    Height = 19
+    Top = 297
+    Width = 103
+    BorderSpacing.Left = 16
+    BorderSpacing.Top = 16
+    BorderSpacing.Bottom = 8
+    Caption = 'Get Interactions'
+    TabOrder = 3
+  end
+  object PlotOptionsBox: TRadioGroup
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 364
+    Height = 114
+    Top = 16
+    Width = 195
+    Anchors = [akTop, akRight]
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Left = 16
+    BorderSpacing.Top = 16
+    BorderSpacing.Right = 8
+    Caption = 'Plot Options'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 94
+    ClientWidth = 191
+    ItemIndex = 0
+    Items.Strings = (
+      'no plot'
+      'Plot with Vertical 3D Bars'
+      'Plot with Vertical 2D Bars'
+      'Plot with Horizontal 2D Bars'
+    )
+    TabOrder = 1
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = PlotOptionsBox
+    AnchorSideBottom.Control = OverAllAlpha
+    Left = 8
+    Height = 370
+    Top = 8
+    Width = 340
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Bottom = 8
+    BevelOuter = bvNone
+    ClientHeight = 370
+    ClientWidth = 340
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Panel1
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 49
+      Caption = 'Variables:'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Label1
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = DepIn
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 353
+      Top = 17
+      Width = 187
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      ItemHeight = 0
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 0
+    end
+    object DepIn: TBitBtn
+      AnchorSideLeft.Control = Bevel2
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = VarList
+      Left = 195
+      Height = 28
+      Top = 17
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = DepInClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object StaticText1: TStaticText
+      AnchorSideLeft.Control = DepIn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = DepVar
+      Left = 231
+      Height = 16
+      Top = 24
+      Width = 103
+      Anchors = [akLeft, akBottom]
+      AutoSize = True
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Dependent Variable'
+      TabOrder = 3
+    end
+    object DepOut: TBitBtn
+      AnchorSideLeft.Control = DepIn
+      AnchorSideTop.Control = DepIn
+      AnchorSideTop.Side = asrBottom
+      Left = 195
+      Height = 28
+      Top = 49
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = DepOutClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object Fact1In: TBitBtn
+      AnchorSideLeft.Control = DepIn
+      AnchorSideTop.Control = DepOut
+      AnchorSideTop.Side = asrBottom
+      Left = 195
+      Height = 28
+      Top = 101
+      Width = 28
+      BorderSpacing.Top = 24
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = Fact1InClick
+      Spacing = 0
+      TabOrder = 5
+    end
+    object Fact1Out: TBitBtn
+      AnchorSideLeft.Control = DepIn
+      AnchorSideTop.Control = Fact1In
+      AnchorSideTop.Side = asrBottom
+      Left = 195
+      Height = 28
+      Top = 133
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = Fact1OutClick
+      Spacing = 0
+      TabOrder = 6
+    end
+    object Fact2In: TBitBtn
+      AnchorSideLeft.Control = DepIn
+      AnchorSideTop.Control = Fact1Out
+      AnchorSideTop.Side = asrBottom
+      Left = 195
+      Height = 28
+      Top = 185
+      Width = 28
+      BorderSpacing.Top = 24
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = Fact2InClick
+      Spacing = 0
+      TabOrder = 9
+    end
+    object Fact2Out: TBitBtn
+      AnchorSideLeft.Control = DepIn
+      AnchorSideTop.Control = Fact2In
+      AnchorSideTop.Side = asrBottom
+      Left = 195
+      Height = 28
+      Top = 217
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = Fact2OutClick
+      Spacing = 0
+      TabOrder = 10
+    end
+    object StaticText2: TStaticText
+      AnchorSideLeft.Control = DepIn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = Factor1
+      Left = 231
+      Height = 16
+      Top = 108
+      Width = 87
+      Anchors = [akLeft, akBottom]
+      AutoSize = True
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Factor 1 Variable'
+      TabOrder = 7
+    end
+    object Factor1: TEdit
+      AnchorSideLeft.Control = DepIn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Fact1Out
+      AnchorSideBottom.Side = asrBottom
+      Left = 231
+      Height = 23
+      Top = 126
+      Width = 109
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 8
+      Text = 'Edit1'
+    end
+    object StaticText3: TStaticText
+      AnchorSideLeft.Control = DepIn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = Factor2
+      Left = 231
+      Height = 16
+      Top = 192
+      Width = 87
+      Anchors = [akLeft, akBottom]
+      AutoSize = True
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Factor 2 Variable'
+      TabOrder = 11
+    end
+    object Factor2: TEdit
+      AnchorSideLeft.Control = DepIn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Fact2Out
+      AnchorSideBottom.Side = asrBottom
+      Left = 231
+      Height = 23
+      Top = 210
+      Width = 109
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 12
+      Text = 'Edit1'
+    end
+    object Fact3In: TBitBtn
+      AnchorSideLeft.Control = DepIn
+      AnchorSideTop.Control = Fact2Out
+      AnchorSideTop.Side = asrBottom
+      Left = 195
+      Height = 28
+      Top = 269
+      Width = 28
+      BorderSpacing.Top = 24
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = Fact3InClick
+      Spacing = 0
+      TabOrder = 13
+    end
+    object Fact3Out: TBitBtn
+      AnchorSideLeft.Control = DepIn
+      AnchorSideTop.Control = Fact3In
+      AnchorSideTop.Side = asrBottom
+      Left = 195
+      Height = 28
+      Top = 301
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = Fact3OutClick
+      Spacing = 0
+      TabOrder = 14
+    end
+    object StaticText4: TStaticText
+      AnchorSideLeft.Control = DepIn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = Factor3
+      Left = 231
+      Height = 16
+      Top = 276
+      Width = 72
+      Anchors = [akLeft, akBottom]
+      AutoSize = True
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 2
+      Caption = 'Factor 3 Clark'
+      TabOrder = 15
+    end
+    object Factor3: TEdit
+      AnchorSideLeft.Control = DepIn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Fact3Out
+      AnchorSideBottom.Side = asrBottom
+      Left = 231
+      Height = 23
+      Top = 294
+      Width = 109
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 16
+      Text = 'Edit1'
+    end
+    object DepVar: TEdit
+      AnchorSideLeft.Control = DepIn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = DepOut
+      AnchorSideBottom.Side = asrBottom
+      Left = 231
+      Height = 23
+      Top = 42
+      Width = 109
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 4
+      Text = 'DepVar'
+    end
+    object Bevel2: TBevel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = Panel1
+      Left = 145
+      Height = 17
+      Top = 0
+      Width = 50
+      Shape = bsSpacer
+    end
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/ttestunit.lfm

@@ -0,0 +1,686 @@
+object TtestFrm: TTtestFrm
+  Left = 629
+  Height = 505
+  Top = 216
+  Width = 544
+  AutoSize = True
+  Caption = 'Comparison of Two Sample Means'
+  ClientHeight = 505
+  ClientWidth = 544
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = CloseBtn
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 477
+    Width = 149
+    BorderSpacing.Left = 8
+    Caption = 'Percent Confidence Interval:'
+    ParentColor = False
+  end
+  object RadioGroup1: TRadioGroup
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 72
+    Top = 8
+    Width = 195
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Data Entry By:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 52
+    ClientWidth = 191
+    Items.Strings = (
+      'Values Entered on this Form'
+      'Values in the data grid file'
+    )
+    OnClick = RadioGroup1Click
+    TabOrder = 0
+  end
+  object RadioGroup2: TRadioGroup
+    AnchorSideLeft.Control = RadioGroup1
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Owner
+    Left = 219
+    Height = 72
+    Top = 8
+    Width = 152
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Left = 16
+    BorderSpacing.Top = 8
+    Caption = 'Test Assumptions:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 52
+    ClientWidth = 148
+    Items.Strings = (
+      'Independent Scores'
+      'Correlated Scores'
+    )
+    OnClick = RadioGroup2Click
+    TabOrder = 1
+  end
+  object CInterval: TEdit
+    AnchorSideLeft.Control = Label1
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = ResetBtn
+    AnchorSideTop.Side = asrCenter
+    Left = 165
+    Height = 23
+    Top = 473
+    Width = 46
+    Alignment = taRightJustify
+    BorderSpacing.Left = 8
+    TabOrder = 4
+    Text = '95.0'
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 331
+    Height = 25
+    Top = 472
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 5
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 393
+    Height = 25
+    Top = 472
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 6
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 477
+    Height = 25
+    Top = 472
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 7
+  end
+  object RadioGroup3: TRadioGroup
+    AnchorSideLeft.Control = RadioGroup2
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Owner
+    Left = 387
+    Height = 72
+    Top = 8
+    Width = 140
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Left = 16
+    BorderSpacing.Top = 8
+    Caption = 'Test Probability'
+    ChildSizing.LeftRightSpacing = 6
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 52
+    ClientWidth = 136
+    ItemIndex = 0
+    Items.Strings = (
+      'Two-tailed (default)'
+      'One-tailed'
+    )
+    TabOrder = 2
+  end
+  object Notebook1: TNotebook
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Bevel3
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel2
+    Left = 8
+    Height = 360
+    Top = 96
+    Width = 528
+    PageIndex = 1
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    TabOrder = 3
+    object Page1: TPage
+      object Panel2: TPanel
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = Page1
+        Left = 48
+        Height = 117
+        Top = 16
+        Width = 433
+        AutoSize = True
+        BorderSpacing.Top = 16
+        BevelOuter = bvNone
+        ClientHeight = 117
+        ClientWidth = 433
+        TabOrder = 0
+        object Mean1Label: TLabel
+          AnchorSideTop.Control = Mean1
+          AnchorSideTop.Side = asrCenter
+          Left = 8
+          Height = 15
+          Top = 4
+          Width = 39
+          BorderSpacing.Left = 8
+          Caption = 'Mean 1'
+          ParentColor = False
+        end
+        object Mean2Label: TLabel
+          AnchorSideTop.Control = Mean2
+          AnchorSideTop.Side = asrCenter
+          AnchorSideRight.Control = Mean1Label
+          AnchorSideRight.Side = asrBottom
+          Left = 8
+          Height = 15
+          Top = 51
+          Width = 39
+          Anchors = [akTop, akRight]
+          BorderSpacing.Left = 8
+          Caption = 'Mean 2'
+          ParentColor = False
+        end
+        object SD1Label: TLabel
+          AnchorSideLeft.Control = Mean1
+          AnchorSideLeft.Side = asrBottom
+          AnchorSideTop.Control = SD1
+          AnchorSideTop.Side = asrCenter
+          Left = 145
+          Height = 15
+          Top = 4
+          Width = 55
+          BorderSpacing.Left = 24
+          Caption = 'Std. Dev. 1'
+          ParentColor = False
+        end
+        object SD2Label: TLabel
+          AnchorSideTop.Control = SD2
+          AnchorSideTop.Side = asrCenter
+          AnchorSideRight.Control = SD2
+          Left = 145
+          Height = 15
+          Top = 51
+          Width = 55
+          Anchors = [akTop, akRight]
+          BorderSpacing.Right = 8
+          Caption = 'Std. Dev. 2'
+          ParentColor = False
+        end
+        object SampSize1Label: TLabel
+          AnchorSideLeft.Control = SD1
+          AnchorSideLeft.Side = asrBottom
+          AnchorSideTop.Control = N1
+          AnchorSideTop.Side = asrCenter
+          Left = 292
+          Height = 15
+          Top = 4
+          Width = 71
+          BorderSpacing.Left = 24
+          Caption = 'Sample Size 1'
+          ParentColor = False
+        end
+        object SampSize2Label: TLabel
+          AnchorSideTop.Control = N2
+          AnchorSideTop.Side = asrCenter
+          AnchorSideRight.Control = N2
+          Left = 292
+          Height = 15
+          Top = 51
+          Width = 71
+          Anchors = [akTop]
+          BorderSpacing.Right = 8
+          Caption = 'Sample Size 2'
+          ParentColor = False
+        end
+        object CorBetweenLabel: TLabel
+          AnchorSideTop.Control = Cor12
+          AnchorSideTop.Side = asrCenter
+          AnchorSideRight.Control = Cor12
+          Left = 60
+          Height = 15
+          Top = 98
+          Width = 147
+          Anchors = [akTop, akRight]
+          BorderSpacing.Right = 8
+          Caption = 'Correlation Between Scores:'
+          ParentColor = False
+        end
+        object Mean1: TEdit
+          AnchorSideLeft.Control = Mean1Label
+          AnchorSideLeft.Side = asrBottom
+          AnchorSideTop.Control = Panel2
+          Left = 55
+          Height = 23
+          Top = 0
+          Width = 66
+          Alignment = taRightJustify
+          BorderSpacing.Left = 8
+          TabOrder = 0
+          Text = 'Mean1'
+        end
+        object Mean2: TEdit
+          AnchorSideLeft.Control = Mean1
+          AnchorSideTop.Control = Mean1
+          AnchorSideTop.Side = asrBottom
+          AnchorSideRight.Control = Mean1
+          AnchorSideRight.Side = asrBottom
+          Left = 55
+          Height = 23
+          Top = 47
+          Width = 66
+          Alignment = taRightJustify
+          Anchors = [akTop, akLeft, akRight]
+          BorderSpacing.Top = 24
+          TabOrder = 3
+          Text = 'Mean2'
+        end
+        object SD1: TEdit
+          AnchorSideLeft.Control = SD1Label
+          AnchorSideLeft.Side = asrBottom
+          AnchorSideTop.Control = Panel2
+          Left = 208
+          Height = 23
+          Top = 0
+          Width = 60
+          Alignment = taRightJustify
+          BorderSpacing.Left = 8
+          TabOrder = 1
+          Text = 'SD1'
+        end
+        object SD2: TEdit
+          AnchorSideLeft.Control = SD1
+          AnchorSideTop.Control = SD1
+          AnchorSideTop.Side = asrBottom
+          AnchorSideRight.Control = SD1
+          AnchorSideRight.Side = asrBottom
+          Left = 208
+          Height = 23
+          Top = 47
+          Width = 60
+          Alignment = taRightJustify
+          Anchors = [akTop, akLeft, akRight]
+          BorderSpacing.Top = 24
+          TabOrder = 4
+          Text = 'SD2'
+        end
+        object N1: TEdit
+          AnchorSideLeft.Control = SampSize1Label
+          AnchorSideLeft.Side = asrBottom
+          AnchorSideTop.Control = Panel2
+          Left = 371
+          Height = 23
+          Top = 0
+          Width = 62
+          Alignment = taRightJustify
+          BorderSpacing.Left = 8
+          TabOrder = 2
+          Text = 'N1'
+        end
+        object N2: TEdit
+          AnchorSideLeft.Control = N1
+          AnchorSideTop.Control = N1
+          AnchorSideTop.Side = asrBottom
+          AnchorSideRight.Control = N1
+          AnchorSideRight.Side = asrBottom
+          Left = 371
+          Height = 23
+          Top = 47
+          Width = 62
+          Alignment = taRightJustify
+          Anchors = [akTop, akLeft, akRight]
+          BorderSpacing.Top = 24
+          TabOrder = 5
+          Text = 'N2'
+        end
+        object Cor12: TEdit
+          AnchorSideLeft.Control = SD1
+          AnchorSideLeft.Side = asrCenter
+          AnchorSideTop.Control = SD2
+          AnchorSideTop.Side = asrBottom
+          Left = 215
+          Height = 23
+          Top = 94
+          Width = 47
+          Alignment = taRightJustify
+          BorderSpacing.Top = 24
+          TabOrder = 6
+          Text = 'Cor12'
+        end
+      end
+    end
+    object Page2: TPage
+      object Memo1: TLabel
+        AnchorSideLeft.Control = Page2
+        AnchorSideTop.Control = Page2
+        AnchorSideRight.Control = Page2
+        AnchorSideRight.Side = asrBottom
+        Left = 0
+        Height = 75
+        Top = 0
+        Width = 528
+        Anchors = [akTop, akLeft, akRight]
+        Caption = 'Directions:  '#13#10'For independent groups data, first click the variable to be analyzed then click the variable containing group codes. '#13#10'For dependent variables it is assumed the data for each pair of values are in a case.  '#13#10'Enter the names of those two variables.'
+        ParentColor = False
+        WordWrap = True
+      end
+      object SelVarLabel: TLabel
+        AnchorSideLeft.Control = Page2
+        AnchorSideTop.Control = Memo1
+        AnchorSideTop.Side = asrBottom
+        Left = 0
+        Height = 15
+        Top = 91
+        Width = 83
+        BorderSpacing.Top = 16
+        Caption = 'Select Variables:'
+        ParentColor = False
+      end
+      object ListBox1: TListBox
+        AnchorSideLeft.Control = Page2
+        AnchorSideTop.Control = SelVarLabel
+        AnchorSideTop.Side = asrBottom
+        AnchorSideRight.Control = Bevel1
+        AnchorSideBottom.Control = Page2
+        AnchorSideBottom.Side = asrBottom
+        Left = 0
+        Height = 252
+        Top = 108
+        Width = 256
+        Anchors = [akTop, akLeft, akRight, akBottom]
+        BorderSpacing.Top = 2
+        ItemHeight = 0
+        OnClick = ListBox1Click
+        TabOrder = 0
+      end
+      object Bevel1: TBevel
+        AnchorSideLeft.Control = Page2
+        AnchorSideLeft.Side = asrCenter
+        Left = 256
+        Height = 91
+        Top = 92
+        Width = 16
+        Shape = bsSpacer
+      end
+      object FirstVarLabel: TLabel
+        AnchorSideLeft.Control = Bevel1
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = Var1
+        AnchorSideTop.Side = asrCenter
+        AnchorSideRight.Control = Var1
+        Left = 284
+        Height = 15
+        Top = 112
+        Width = 62
+        Alignment = taRightJustify
+        BorderSpacing.Left = 12
+        BorderSpacing.Right = 8
+        Caption = '1st Variable:'
+        ParentColor = False
+      end
+      object SecdVarLabel: TLabel
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = Var2
+        Left = 279
+        Height = 15
+        Top = 143
+        Width = 67
+        Alignment = taRightJustify
+        Anchors = [akTop, akRight]
+        BorderSpacing.Right = 8
+        Caption = '2nd Variable:'
+        ParentColor = False
+      end
+      object GrpLabel: TLabel
+        AnchorSideTop.Control = Grp
+        AnchorSideTop.Side = asrCenter
+        AnchorSideRight.Control = Grp
+        Left = 279
+        Height = 15
+        Top = 143
+        Width = 67
+        Alignment = taRightJustify
+        Anchors = [akTop, akRight]
+        BorderSpacing.Right = 8
+        Caption = 'Group Code:'
+        ParentColor = False
+      end
+      object Bevel5: TBevel
+        Left = 273
+        Height = 11
+        Top = 92
+        Width = 87
+        Shape = bsSpacer
+      end
+      object Var1: TEdit
+        AnchorSideLeft.Control = FirstVarLabel
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = ListBox1
+        AnchorSideRight.Control = Page2
+        AnchorSideRight.Side = asrBottom
+        Left = 354
+        Height = 23
+        Top = 108
+        Width = 174
+        Anchors = [akTop, akLeft, akRight]
+        TabOrder = 1
+        Text = 'Var1'
+      end
+      object Var2: TEdit
+        AnchorSideLeft.Control = Var1
+        AnchorSideTop.Control = Var1
+        AnchorSideTop.Side = asrBottom
+        AnchorSideRight.Control = Var1
+        AnchorSideRight.Side = asrBottom
+        Left = 354
+        Height = 23
+        Top = 139
+        Width = 174
+        Anchors = [akTop, akLeft, akRight]
+        BorderSpacing.Top = 8
+        TabOrder = 2
+        Text = 'Var2'
+      end
+      object Grp: TEdit
+        AnchorSideLeft.Control = Var1
+        AnchorSideTop.Control = Var1
+        AnchorSideTop.Side = asrBottom
+        AnchorSideRight.Control = Var2
+        AnchorSideRight.Side = asrBottom
+        Left = 354
+        Height = 23
+        Top = 139
+        Width = 174
+        Anchors = [akTop, akLeft, akRight]
+        BorderSpacing.Top = 8
+        TabOrder = 3
+        Text = 'Grp'
+      end
+      object GroupBox1: TGroupBox
+        AnchorSideLeft.Control = Grp
+        AnchorSideTop.Control = Grp
+        AnchorSideTop.Side = asrBottom
+        Left = 354
+        Height = 90
+        Top = 170
+        Width = 164
+        AutoSize = True
+        BorderSpacing.Top = 8
+        ClientHeight = 70
+        ClientWidth = 160
+        TabOrder = 5
+        object Grp1Code: TEdit
+          AnchorSideTop.Control = GroupBox1
+          AnchorSideRight.Control = GroupBox1
+          AnchorSideRight.Side = asrBottom
+          Left = 100
+          Height = 23
+          Top = 8
+          Width = 52
+          Alignment = taRightJustify
+          Anchors = [akTop, akRight]
+          BorderSpacing.Top = 8
+          BorderSpacing.Right = 8
+          Enabled = False
+          TabOrder = 0
+          Text = 'Grp1Code'
+        end
+        object Grp2Code: TEdit
+          AnchorSideTop.Control = Grp1Code
+          AnchorSideTop.Side = asrBottom
+          AnchorSideRight.Control = GroupBox1
+          AnchorSideRight.Side = asrBottom
+          Left = 100
+          Height = 23
+          Top = 39
+          Width = 52
+          Alignment = taRightJustify
+          Anchors = [akTop, akRight]
+          BorderSpacing.Top = 8
+          BorderSpacing.Right = 8
+          BorderSpacing.Bottom = 8
+          Enabled = False
+          TabOrder = 1
+          Text = 'Grp2Code'
+        end
+        object GrpCodeLabel1: TLabel
+          AnchorSideTop.Control = Grp1Code
+          AnchorSideTop.Side = asrCenter
+          AnchorSideRight.Control = Grp1Code
+          Left = 16
+          Height = 15
+          Top = 12
+          Width = 76
+          Alignment = taRightJustify
+          Anchors = [akTop, akRight]
+          BorderSpacing.Left = 16
+          BorderSpacing.Right = 8
+          Caption = 'Group 1 Code:'
+          Enabled = False
+          ParentColor = False
+        end
+        object GrpCodeLabel2: TLabel
+          AnchorSideTop.Control = Grp2Code
+          AnchorSideTop.Side = asrCenter
+          AnchorSideRight.Control = Grp2Code
+          Left = 16
+          Height = 15
+          Top = 43
+          Width = 76
+          Alignment = taRightJustify
+          Anchors = [akTop, akRight]
+          BorderSpacing.Right = 8
+          Caption = 'Group 2 Code:'
+          Enabled = False
+          ParentColor = False
+        end
+      end
+      object GroupCodeBtn: TCheckBox
+        AnchorSideLeft.Control = GroupBox1
+        AnchorSideTop.Control = GroupBox1
+        Left = 362
+        Height = 19
+        Top = 170
+        Width = 130
+        BorderSpacing.Left = 8
+        Caption = 'Specify Group Codes'
+        OnChange = GroupCodeBtnChange
+        TabOrder = 4
+      end
+    end
+  end
+  object Bevel2: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 456
+    Width = 544
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Bevel3: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = RadioGroup1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 0
+    Height = 8
+    Top = 80
+    Width = 544
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Bottom = 8
+    Shape = bsBottomLine
+  end
+  object Bevel4: TBevel
+    Left = 5
+    Height = 11
+    Top = 382
+    Width = 15
+    Shape = bsSpacer
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/ttestunit.pas

@@ -0,0 +1,624 @@
+unit TTestUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  ExtCtrls, StdCtrls,
+  MainUnit, Globals, FunctionsLib, OutputUnit, DataProcs;
+
+type
+
+  { TTtestFrm }
+
+  TTtestFrm = class(TForm)
+    Bevel1: TBevel;
+    Bevel2: TBevel;
+    Bevel3: TBevel;
+    Bevel4: TBevel;
+    Bevel5: TBevel;
+    GroupBox1: TGroupBox;
+    GroupCodeBtn: TCheckBox;
+    Grp1Code: TEdit;
+    Grp2Code: TEdit;
+    GrpCodeLabel1: TLabel;
+    GrpCodeLabel2: TLabel;
+    Memo1: TLabel;
+    Notebook1: TNotebook;
+    Page1: TPage;
+    Page2: TPage;
+    RadioGroup3: TRadioGroup;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    CloseBtn: TButton;
+    CorBetweenLabel: TLabel;
+    Cor12: TEdit;
+    CInterval: TEdit;
+    Grp: TEdit;
+    Label1: TLabel;
+    Var2: TEdit;
+    Var1: TEdit;
+    FirstVarLabel: TLabel;
+    GrpLabel: TLabel;
+    SecdVarLabel: TLabel;
+    ListBox1: TListBox;
+    SelVarLabel: TLabel;
+    N2: TEdit;
+    N1: TEdit;
+    SampSize2Label: TLabel;
+    SampSize1Label: TLabel;
+    SD2: TEdit;
+    SD1: TEdit;
+    SD2Label: TLabel;
+    SD1Label: TLabel;
+    Mean2: TEdit;
+    Mean1: TEdit;
+    Mean2Label: TLabel;
+    Mean1Label: TLabel;
+    Panel2: TPanel;
+    RadioGroup1: TRadioGroup;
+    RadioGroup2: TRadioGroup;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure GroupCodeBtnChange(Sender: TObject);
+    procedure ListBox1Click(Sender: TObject);
+    procedure RadioGroup1Click(Sender: TObject);
+    procedure RadioGroup2Click(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    independent: boolean;
+    griddata: boolean;
+    function Validate(out AMsg: String; out AControl: TWinControl): Boolean;
+
+  public
+    { public declarations }
+  end; 
+
+var
+  TtestFrm: TTtestFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TTtestFrm }
+
+procedure TTtestFrm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  CInterval.Text := FormatFloat('0.0', DEFAULT_CONFIDENCE_LEVEL_PERCENT);
+  RadioGroup1.ItemIndex := 0;
+   RadioGroup2.ItemIndex := 0;
+   Notebook1.PageIndex := RadioGroup1.ItemIndex;
+   ListBox1.Clear;
+   Var1.Text := '';
+   Var2.Text := '';
+   Mean1.Text := '';
+   Mean2.Text := '';
+   SD1.Text := '';
+   SD2.Text := '';
+   N1.Text := '';
+   N2.Text := '';
+   Cor12.Text := '';
+   independent := true;
+   griddata := false;
+   GroupCodeBtn.Checked := false;
+   Grp.Text := '';
+   for i := 1 to NoVariables do
+     ListBox1.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+   Grp.Text := '';
+   Grp1Code.Text := '';
+   Grp2Code.Text := '';
+end;
+
+procedure TTtestFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  Constraints.MinWidth := CInterval.Left + CInterval.Width + (Width - ResetBtn.Left) + ResetBtn.BorderSpacing.Left;
+
+  Bevel5.Width := SecdVarLabel.Canvas.TextWidth(SecdVarlabel.Caption);
+  //ListBox1.Constraints.MinHeight := Grp2Code.Top + Grp2Code.Height - Listbox1.Top - Var2.Height - Var2.BorderSpacing.Top;
+
+  //Constraints.MinHeight := ListBox1.Top + ListBox1.Constraints.MinHeight + Bevel2.Height + CloseBtn.Height + CloseBtn.BorderSpacing.Top*2;
+  FAutoSized := true;
+end;
+
+procedure TTtestFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+end;
+
+procedure TTtestFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TTtestFrm.GroupCodeBtnChange(Sender: TObject);
+begin
+  Grp1Code.Enabled := GroupCodeBtn.Checked;
+  Grp2Code.Enabled := GroupCodeBtn.Checked;
+  GrpCodeLabel1.Enabled := GroupCodeBtn.Checked;
+  GrpCodeLabel2.Enabled := GroupCodeBtn.Checked;
+end;
+
+procedure TTtestFrm.ComputeBtnClick(Sender: TObject);
+var
+  M1, M2, Dif, stddev1, stddev2, r12, stderr1, stderr2: double;
+  tequal, tunequal, cov12, lowci, hici, F, Fp, df1, df2: double;
+  tprobability, value1, value2: double;
+  variance1, variance2, pooled, sedif, df, ConfInt, tconfint: double;
+  i, v1, v2, ncases1, ncases2, NoSelected: integer;
+  group, min, max: integer;
+  ColNoSelected: IntDyneVec;
+  label1Str, label2Str: string;
+  msg: String;
+  C: TWinControl;
+  lReport: TStrings;
+begin
+  if not Validate(msg, C) then
+  begin
+    C.SetFocus;
+    MessageDlg(msg, mtError, [mbOK], 0);
+    ModalResult := mrNone;
+    exit;
+  end;
+
+  SetLength(ColNoSelected,NoVariables);
+  ncases1 := 0;
+  ncases2 := 0;
+  variance1 := 0.0;
+  variance2 := 0.0;
+  M1 := 0.0;
+  M2 := 0.0;
+  Dif := 0.0;
+  r12 := 0.0;
+  v1 := 0;
+  v2 := 0;
+  stddev1 := 0.0;
+  stddev2 := 0.0;
+
+  ConfInt := (100.0 - StrToFloat(CInterval.Text)) / 2.0 ;
+  ConfInt := (100.0 - ConfInt) / 100.0; // one tail
+
+  if independent then
+    Var2.Text := Grp.Text;
+
+  // data read from grid
+  if griddata then
+  begin
+    for i := 1 to NoVariables do
+    begin
+      if Var1.Text = OS3MainFrm.DataGrid.Cells[i,0] then
+      begin
+        v1 := i;
+        ColNoSelected[0] := i;
+        label1Str := Var1.Text;
+      end;
+      if Var2.Text = OS3MainFrm.DataGrid.Cells[i,0] then
+      begin
+        v2 := i;
+        ColNoSelected[1] := i;
+        label2Str := Var2.Text;
+      end;
+    end; // next variable
+
+    ncases1 := 0;
+    ncases2 := 0;
+    NoSelected := 2;
+    M1 := 0.0;
+    M2 := 0.0;
+    variance1 := 0.0;
+    variance2 := 0.0;
+    r12 := 0.0;
+    if not independent then // correlated data
+    begin
+      for i := 1 to NoCases do
+      begin
+        if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        ncases1 := ncases1 + 1;
+        value1 := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v1,i]));
+        value2 := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v2,i]));
+        M1 := M1 + value1;
+        M2 := M2 + value2;
+        variance1 := variance1 + value1 * value1;
+        variance2 := variance2 + value2 * value2;
+        r12 := r12 + value1 * value2;
+      end;
+
+      ncases2 := ncases1;
+      variance1 := variance1 - (M1 * M1 / ncases1);
+      variance1 := variance1 / (ncases1 - 1);
+      stddev1 := sqrt(variance1);
+      variance2 := variance2 - (M2 * M2 / ncases2);
+      variance2 := variance2 / (ncases2 - 1);
+      stddev2 := sqrt(variance2);
+      r12 := r12 - (M1 * M2 / ncases1);
+      r12 := r12 / (ncases1 - 1);
+      cov12 := r12;
+      r12 := r12 / (stddev1 * stddev2);
+      M1 := M1 / ncases1;
+      M2 := M2 / ncases2;
+      Dif := M1 - M2;
+    end; //if not independent
+
+    if independent then
+    begin
+      if GroupCodeBtn.Checked then
+      begin
+        min := StrToInt(Grp1Code.Text);
+        max := StrToInt(Grp2Code.Text);
+                    {
+                    response := InputBox('Group 1','Enter the code for group 1','1');
+                    min := StrToInt(response);
+                    response := InputBox('Group 2','Enter the code for group 2','2');
+                    max := StrToInt(response);
+                    }
+      end else
+      begin
+        min := round(StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v2,1])));
+        max := min;
+      end;
+
+      for i := 2 to NoCases do
+      begin
+        if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        group := round(StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v2,i])));
+        if GroupCodeBtn.Checked = false then
+        begin
+          if group < min then min := group;
+          if group > max then max := group;
+        end;
+      end;
+
+      for i := 1 to NoCases do
+      begin
+        if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        value1 := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v1,i]));
+        value2 := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v2,i]));
+        group := round(value2);
+        if group = min then
+        begin
+          M1 := M1 + value1;
+          variance1 := variance1 + (value1 * value1);
+          ncases1 := ncases1 + 1;
+        end else if group = max then
+        begin
+          M2 := M2 + value1;
+          variance2 := variance2 + (value1 * value1);
+          ncases2 := Ncases2 + 1;
+        end;
+      end; // next case
+
+      variance1 := variance1 - ((M1 * M1) / ncases1);
+      variance1 := variance1 / (ncases1 - 1);
+      stddev1 := sqrt(variance1);
+      variance2 := variance2 - ((M2 * M2) / ncases2);
+      variance2 := variance2 / (ncases2 - 1);
+      stddev2 := sqrt(variance2);
+      M1 := M1 / ncases1;
+      M2 := M2 / ncases2;
+      Dif := M1 - M2;
+      Label1Str := format('Group %d',[min]);
+      Label2Str := format('Group %d',[max]);
+    end; // if independent data
+  end; // if reading grid data
+
+  if not griddata then // data read from form
+  begin
+    M1 := StrToFloat(Mean1.Text);
+    M2 := StrToFloat(Mean2.Text);
+    stddev1 := StrToFloat(SD1.Text);
+    stddev2 := StrToFloat(SD2.Text);
+    ncases1 := round(StrToFloat(N1.Text));
+    ncases2 := round(StrToFloat(N2.Text));
+    variance1 := stddev1 * stddev1;
+    variance2 := stddev2 * stddev2;
+    Label1Str := 'Group 1';
+    Label2Str := 'Group 2';
+    Dif := M1 - M2;
+    if not independent then
+    begin
+      r12 := StrToFloat(Cor12.Text);
+      cov12 := r12 * stddev1 * stddev2;
+    end;
+  end;
+
+
+  // Initialize output form
+  lReport := TStringList.Create;
+  try
+    lReport.Add('COMPARISON OF TWO MEANS');
+    lReport.Add('');
+
+    // Calculate pooled and independent t and z values and test statistic
+    if independent then
+    begin
+      stderr1 := sqrt(variance1 / ncases1);
+      Stderr2 := sqrt(variance2 / ncases2);
+      lReport.Add('Variable    Mean    Variance  Std.Dev.  S.E.Mean  N');
+      lReport.Add('%-10s%8.2f  %8.2f  %8.2f  %8.2f  %d', [Label1Str, M1, variance1, stddev1, stderr1, ncases1]);
+      lReport.Add('%-10s%8.2f  %8.2f  %8.2f  %8.2f  %d', [Label2Str, M2, variance2, stddev2, stderr2, ncases2]);
+      lReport.Add('');
+
+      pooled := ((ncases1-1) * variance1) + ((ncases2-1) * variance2);
+      pooled := pooled / (ncases1 + ncases2 - 2);
+      pooled := pooled * ( 1.0 / ncases1 + 1.0 / ncases2);
+      sedif := sqrt(pooled);
+      tequal := dif / sedif;
+      df := ncases1 + ncases2 - 2;
+      tprobability := probt(tequal,df);
+      if RadioGroup3.ItemIndex = 1 then tprobability := 0.5 * tprobability;
+      lReport.Add('Assuming equal variances, t = %.3f with probability = %.4f and %.0f degrees of freedom', [
+        tequal, tprobability, df
+      ]);
+      lReport.Add('Difference = %.2f and Standard Error of difference = %.2f', [dif, sedif]);
+
+      tconfint := inverset(ConfInt,df);
+      lowci := dif - tconfint * sedif;
+      hici := dif + tconfint * sedif;
+      lReport.Add('Confidence interval = (%.2f ... %.2f)', [lowci, hici]);
+
+      // now for unequal variances
+      sedif := sqrt((variance1 / ncases1) + (variance2 / ncases2));
+      tunequal := dif / sedif;
+      df := sqr((variance1 / ncases1) + (variance2 / ncases2));
+      df := df / (sqr(variance1 / ncases1) / (ncases1 - 1) + sqr(variance2 / ncases2) / (ncases2 - 1) );
+      tprobability := probt(tequal,df);
+      if RadioGroup3.ItemIndex = 1 then tprobability := 0.5 * tprobability;
+      lReport.Add('Assuming unequal variances, t = %.3f with probability = %.4f and %.0f degrees of freedom', [
+        tunequal, tprobability, df
+      ]);
+      lReport.Add('Difference = %.2f and Standard Error of difference = %.2f', [dif, sedif]);
+
+      tconfint := inverset(ConfInt,df);
+      lowci := dif - tconfint * sedif;
+      hici := dif + tconfint * sedif;
+      lReport.Add('Confidence interval = (%.2f ... %.2f)', [lowci, hici]);
+
+      df1 := ncases1 - 1;
+      df2 := ncases2 - 1;
+      if variance1 > variance2 then
+      begin
+        F := variance1 / variance2;
+        Fp := probf(F,df1,df2);
+      end else
+      begin
+        F := variance2 / variance1;
+        Fp := probf(F,df2,df1);
+      end;
+      lReport.Add('F test for equal variances = %.3f, Probability = %.4f', [F, fp]);
+     end
+    else
+    // dependent t test
+    begin
+      stderr1 := sqrt(variance1 / ncases1);
+      Stderr2 := sqrt(variance2 / ncases2);
+      lReport.Add('Variable    Mean    Variance  Std.Dev.  S.E.Mean  N');
+      lReport.Add('%-10s%8.2f  %8.2f  %8.2f  %8.2f  %d', [Label1Str, M1, variance1, stddev1, stderr1, ncases1]);
+      lReport.Add('%-10s%8.2f  %8.2f  %8.2f  %8.2f  %d', [Label2Str,M2, variance2, stddev2, stderr2, ncases2]);
+      lReport.Add('');
+      sedif := variance1 + variance2 - (2.0 * cov12);
+      sedif := sqrt(sedif / ncases1);
+      tequal := Dif / sedif;
+      df := ncases1 - 1;
+      tprobability := probt(tequal,df);
+      lReport.Add('Assuming dependent samples, t = %.3f with probability = %.4f and %.0f degrees of freedom', [
+        tequal, tprobability, df
+      ]);
+      lReport.Add('Correlation between %s and %s = %.3f', [Label1Str, Label2Str, r12]);
+      lReport.Add('Difference = %.2f and Standard Error of difference = %.2f', [dif, sedif]);
+
+      tconfint := inverset(ConfInt,df);
+      lowci := dif - tconfint * sedif;
+      hici := dif + tconfint * sedif;
+      lReport.Add('Confidence interval = (%.2f ... %.2f)', [lowci, hici]);
+
+      tequal := variance1 - variance2;
+      tequal := tequal / sqrt( (4 * variance1 * variance2)/(ncases1 - 2) * (1.0 - sqr(r12)) );
+      df := ncases1 - 2;
+      tprobability := probt(tequal,df);
+      lReport.Add('t for test of equal variances = %.3f with probability = %.4f', [tequal, tprobability]);
+    end;
+
+    DisplayReport(lReport);
+
+  finally
+    lReport.Free;
+    ColNoSelected := nil;
+  end;
+end;
+
+procedure TTtestFrm.ListBox1Click(Sender: TObject);
+VAR index : integer;
+begin
+     index := ListBox1.ItemIndex;
+     if not independent then
+     begin
+          if Var1.Text <> '' then Var2.Text := ListBox1.Items.Strings[index]
+          else Var1.Text := ListBox1.Items.Strings[index];
+     end;
+     if independent then
+     begin
+          if Var1.Text <> '' then Grp.Text := ListBox1.Items.Strings[index]
+          else Var1.Text := ListBox1.Items.Strings[index];
+     end;
+end;
+
+procedure TTtestFrm.RadioGroup1Click(Sender: TObject);
+VAR
+  index : integer;
+begin
+     index := RadioGroup1.ItemIndex;
+     Notebook1.PageIndex := index;
+     if index = 0 then
+     begin
+//          Panel2.Visible := true;
+//          Panel1.Visible := false;
+          griddata := false;
+     end
+     else
+     begin
+//          Panel1.Visible := true;
+//          Panel2.Visible := false;
+          griddata := true;
+          if RadioGroup2.ItemIndex = 1 then
+          begin
+               SecdVarLabel.Visible := true;
+               Var2.Visible := true;
+               Grp.Visible := false;
+               GrpLabel.Visible := false;
+          end
+          else
+          begin
+               SecdVarLabel.Visible := false;
+               Var2.Visible := false;
+               Grp.Visible := true;
+               GrpLabel.Visible := true;
+          end;
+     end;
+end;
+
+procedure TTtestFrm.RadioGroup2Click(Sender: TObject);
+var
+  index: integer;
+begin
+  index := RadioGroup2.ItemIndex;
+  independent := (index = 0);
+  Grp.Visible := independent;
+  GrpLabel.Visible := independent;
+  GroupCodeBtn.Visible := independent;
+  GroupBox1.Visible := independent;
+  SecdVarLabel.Visible := not independent;
+  Var2.Visible := not independent;
+  {
+     if index = 0 then
+     begin
+          independent := true;
+          CorBetweenLabel.Visible := false;
+          Cor12.Visible := false;
+          Grp.Visible := true;
+          GrpLabel.Visible := true;
+          GroupCodeBtn.Visible := true;
+          Groupbxo1.Visible := true;
+          SecdVarLabel.Visible := false;
+          Var2.Visible := false;
+     end
+     else
+     begin
+          independent := false;
+          CorBetweenLabel.Visible := true;
+          Cor12.Visible := true;
+          GrpLabel.Visible := false;
+          Grp.Visible := false;
+          GroupCodeBtn.Visible := false;
+          SecdVarLabel.Visible := true;
+          Var2.Visible := true;
+     end;
+     }
+end;
+
+function TTtestFrm.Validate(out AMsg: String; out AControl: TWinControl): Boolean;
+var
+  n: Integer;
+  x: Double;
+begin
+  Result := false;
+  AControl := nil;
+  AMsg := '';
+  if Notebook1.PageIndex = 0 then
+  begin
+    if (Mean1.Text = '') or not TryStrToFloat(Mean1.Text, x) then
+    begin
+      AControl := Mean1;
+      AMsg := 'Invalid input for the mean of sample 1';
+      exit;
+    end;
+    if (SD1.Text = '') or not TryStrToFloat(SD1.Text, x) or (x <= 0) then
+    begin
+      AControl := SD1;
+      AMsg := 'Invald input for the standard deviation of sample 1';
+      exit;
+    end;
+    if (N1.Text = '') or not TryStrToInt(N1.Text, n) or (n <= 0) then
+    begin
+      AControl := N1;
+      AMsg := 'Invald input for the size of sample 1';
+      exit;
+    end;
+    if (Mean2.Text = '') or not TryStrToFloat(Mean2.Text, x) then
+    begin
+      AControl := Mean2;
+      AMsg := 'Invalid input for the mean of sample 2';
+      exit;
+    end;
+    if (SD2.Text = '') or not TryStrToFloat(SD2.Text, x) or (x <= 0) then
+    begin
+      AControl := SD2;
+      AMsg := 'Invald input for the standard deviation of sample 2';
+      exit;
+    end;
+    if (N2.Text = '') or not TryStrToInt(N2.Text, n) or (n <= 0) then
+    begin
+      AControl := N2;
+      AMsg := 'Invald input for the size of sample 2';
+      exit;
+    end;
+  end else
+  if Notebook1.PageIndex = 1 then
+  begin
+    if (Var1.Text = '')  then
+    begin
+      AControl := Var1;
+      AMsg := 'Variable 1 not specified.';
+      exit;
+    end;
+    if Var2.Visible and (Var2.Text = '') then
+    begin
+      AControl := Var2;
+      AMsg := 'Variable 2 not specified.';
+      exit;
+    end;
+    if Grp.Visible and (Grp.Text = '') then
+    begin
+      AControl := Grp;
+      AMsg := 'Group variable not specified.';
+      exit;
+    end;
+    if Grp1Code.Visible and ((Grp1Code.Text = '') or not TryStrToInt(Grp1Code.Text, n))then
+    begin
+      AControl := Grp1Code;
+      AMsg := 'Code for group 1 missing.';
+      exit;
+    end;
+    if Grp2Code.Visible and ((Grp2Code.Text = '') or not TryStrToInt(Grp2Code.Text, n))then
+    begin
+      AControl := Grp2Code;
+      AMsg := 'Code for group 2 missing.';
+      exit;
+    end;
+  end;
+  Result := true;
+end;
+
+initialization
+  {$I ttestunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/comparisons/twocorrsunit.lfm

@@ -0,0 +1,634 @@
+object TwoCorrsFrm: TTwoCorrsFrm
+  Left = 559
+  Height = 391
+  Top = 286
+  Width = 462
+  Caption = 'Comparison of Two Correlations'
+  ClientHeight = 391
+  ClientWidth = 462
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label14: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = CInterval
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 323
+    Width = 149
+    BorderSpacing.Left = 8
+    Caption = 'Percent Confidence Interval:'
+    ParentColor = False
+  end
+  object RadioGroup1: TRadioGroup
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 72
+    Top = 8
+    Width = 225
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Data Entered From:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 52
+    ClientWidth = 221
+    Items.Strings = (
+      'Values entered on this form.'
+      'Values in the data grid from a file.'
+    )
+    OnClick = RadioGroup1Click
+    TabOrder = 0
+  end
+  object RadioGroup2: TRadioGroup
+    AnchorSideLeft.Control = RadioGroup1
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Owner
+    Left = 257
+    Height = 72
+    Top = 8
+    Width = 185
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Left = 24
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'Test Assumptions:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 52
+    ClientWidth = 181
+    Items.Strings = (
+      'Independent Correlations.'
+      'Dependent Correlations.'
+    )
+    OnClick = RadioGroup2Click
+    TabOrder = 1
+  end
+  object CInterval: TEdit
+    AnchorSideLeft.Control = Label14
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Side = asrBottom
+    AnchorSideBottom.Control = Bevel2
+    Left = 165
+    Height = 23
+    Top = 319
+    Width = 36
+    Alignment = taRightJustify
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    TabOrder = 3
+    Text = 'CInterval'
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 243
+    Height = 25
+    Top = 358
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 5
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = ReturnBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 305
+    Height = 25
+    Top = 358
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 6
+  end
+  object ReturnBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 389
+    Height = 25
+    Top = 358
+    Width = 61
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Return'
+    ModalResult = 1
+    TabOrder = 7
+  end
+  object HelpBtn: TButton
+    Tag = 151
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 184
+    Height = 25
+    Top = 358
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 4
+  end
+  object Notebook1: TNotebook
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = RadioGroup1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CInterval
+    Left = 8
+    Height = 223
+    Top = 88
+    Width = 454
+    PageIndex = 0
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Bottom = 8
+    TabOrder = 2
+    object Page1: TPage
+      object PanelPage1: TPanel
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = Page1
+        Left = 143
+        Height = 132
+        Top = 0
+        Width = 168
+        AutoSize = True
+        BorderSpacing.Bottom = 24
+        BevelOuter = bvNone
+        ClientHeight = 132
+        ClientWidth = 168
+        TabOrder = 0
+        object firstcorlabel: TLabel
+          AnchorSideLeft.Control = PanelPage1
+          AnchorSideTop.Control = rxy1
+          AnchorSideTop.Side = asrCenter
+          Left = 0
+          Height = 15
+          Top = 20
+          Width = 87
+          Caption = 'First Correlation:'
+          ParentColor = False
+        end
+        object size1label: TLabel
+          AnchorSideLeft.Control = PanelPage1
+          AnchorSideTop.Control = Size1
+          AnchorSideTop.Side = asrCenter
+          Left = 0
+          Height = 15
+          Top = 51
+          Width = 74
+          Caption = 'Sample Size 1:'
+          ParentColor = False
+        end
+        object SecdCorLabel: TLabel
+          AnchorSideLeft.Control = PanelPage1
+          AnchorSideTop.Control = rxy2
+          AnchorSideTop.Side = asrCenter
+          Left = 0
+          Height = 15
+          Top = 82
+          Width = 104
+          Caption = 'Second Correlation:'
+          ParentColor = False
+        end
+        object Size2Label: TLabel
+          AnchorSideLeft.Control = PanelPage1
+          AnchorSideTop.Control = Size2
+          Left = 0
+          Height = 15
+          Top = 109
+          Width = 74
+          Caption = 'Sample Size 2:'
+          ParentColor = False
+        end
+        object rxy1: TEdit
+          AnchorSideLeft.Control = SecdCorLabel
+          AnchorSideLeft.Side = asrBottom
+          AnchorSideTop.Control = PanelPage1
+          Left = 112
+          Height = 23
+          Top = 16
+          Width = 56
+          Alignment = taRightJustify
+          BorderSpacing.Left = 8
+          BorderSpacing.Top = 16
+          TabOrder = 0
+          Text = 'rxy1'
+        end
+        object Size1: TEdit
+          AnchorSideLeft.Control = SecdCorLabel
+          AnchorSideLeft.Side = asrBottom
+          AnchorSideTop.Control = rxy1
+          AnchorSideTop.Side = asrBottom
+          Left = 112
+          Height = 23
+          Top = 47
+          Width = 56
+          Alignment = taRightJustify
+          BorderSpacing.Left = 8
+          BorderSpacing.Top = 8
+          TabOrder = 1
+          Text = 'Edit1'
+        end
+        object rxy2: TEdit
+          AnchorSideLeft.Control = SecdCorLabel
+          AnchorSideLeft.Side = asrBottom
+          AnchorSideTop.Control = Size1
+          AnchorSideTop.Side = asrBottom
+          Left = 112
+          Height = 23
+          Top = 78
+          Width = 56
+          Alignment = taRightJustify
+          BorderSpacing.Left = 8
+          BorderSpacing.Top = 8
+          TabOrder = 2
+          Text = 'Edit1'
+        end
+        object Size2: TEdit
+          AnchorSideLeft.Control = SecdCorLabel
+          AnchorSideLeft.Side = asrBottom
+          AnchorSideTop.Control = rxy2
+          AnchorSideTop.Side = asrBottom
+          Left = 112
+          Height = 23
+          Top = 109
+          Width = 56
+          Alignment = taRightJustify
+          BorderSpacing.Left = 8
+          BorderSpacing.Top = 8
+          TabOrder = 3
+          Text = 'Edit1'
+        end
+      end
+    end
+    object Page2: TPage
+      object PanelPage2: TPanel
+        AnchorSideLeft.Control = Page2
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = Page2
+        Left = 144
+        Height = 156
+        Top = 0
+        Width = 167
+        AutoSize = True
+        BevelOuter = bvNone
+        ClientHeight = 156
+        ClientWidth = 167
+        TabOrder = 0
+        object corxylabel: TLabel
+          AnchorSideLeft.Control = PanelPage2
+          AnchorSideTop.Control = rxy
+          AnchorSideTop.Side = asrCenter
+          Left = 0
+          Height = 15
+          Top = 20
+          Width = 89
+          Caption = 'Correlation r(x,y)'
+          ParentColor = False
+        end
+        object corxzlabel: TLabel
+          AnchorSideLeft.Control = PanelPage2
+          AnchorSideTop.Control = rxz
+          AnchorSideTop.Side = asrCenter
+          Left = 0
+          Height = 15
+          Top = 51
+          Width = 88
+          Caption = 'Correlation r(x,z)'
+          ParentColor = False
+        end
+        object coryzlabel: TLabel
+          AnchorSideLeft.Control = PanelPage2
+          AnchorSideTop.Control = ryz
+          AnchorSideTop.Side = asrCenter
+          Left = 0
+          Height = 15
+          Top = 82
+          Width = 88
+          Caption = 'Correlation r(y,z)'
+          ParentColor = False
+        end
+        object sampsizelabel: TLabel
+          AnchorSideLeft.Control = PanelPage2
+          AnchorSideTop.Control = SampSize
+          AnchorSideTop.Side = asrCenter
+          Left = 0
+          Height = 15
+          Top = 113
+          Width = 65
+          Caption = 'Sample Size:'
+          ParentColor = False
+        end
+        object rxy: TEdit
+          AnchorSideLeft.Control = corxylabel
+          AnchorSideLeft.Side = asrBottom
+          AnchorSideTop.Control = PanelPage2
+          Left = 105
+          Height = 23
+          Top = 16
+          Width = 62
+          Alignment = taRightJustify
+          BorderSpacing.Left = 16
+          BorderSpacing.Top = 16
+          TabOrder = 0
+          Text = 'rxy'
+        end
+        object SampSize: TEdit
+          AnchorSideLeft.Control = rxy
+          AnchorSideTop.Control = ryz
+          AnchorSideTop.Side = asrBottom
+          AnchorSideRight.Control = rxy
+          AnchorSideRight.Side = asrBottom
+          Left = 105
+          Height = 23
+          Top = 109
+          Width = 62
+          Alignment = taRightJustify
+          Anchors = [akTop, akLeft, akRight]
+          BorderSpacing.Top = 8
+          BorderSpacing.Bottom = 24
+          TabOrder = 3
+          Text = 'Edit1'
+        end
+        object rxz: TEdit
+          AnchorSideLeft.Control = rxy
+          AnchorSideTop.Control = rxy
+          AnchorSideTop.Side = asrBottom
+          AnchorSideRight.Control = rxy
+          AnchorSideRight.Side = asrBottom
+          Left = 105
+          Height = 23
+          Top = 47
+          Width = 62
+          Alignment = taRightJustify
+          Anchors = [akTop, akLeft, akRight]
+          BorderSpacing.Top = 8
+          TabOrder = 1
+          Text = 'Edit1'
+        end
+        object ryz: TEdit
+          AnchorSideLeft.Control = rxy
+          AnchorSideTop.Control = rxz
+          AnchorSideTop.Side = asrBottom
+          AnchorSideRight.Control = rxy
+          AnchorSideRight.Side = asrBottom
+          Left = 105
+          Height = 23
+          Top = 78
+          Width = 62
+          Alignment = taRightJustify
+          Anchors = [akTop, akLeft, akRight]
+          BorderSpacing.Top = 8
+          TabOrder = 2
+          Text = 'Edit1'
+        end
+      end
+    end
+    object Page3: TPage
+      object PanelPage3: TPanel
+        Left = 0
+        Height = 223
+        Top = 0
+        Width = 446
+        Align = alClient
+        BorderSpacing.Right = 8
+        BevelOuter = bvNone
+        ClientHeight = 223
+        ClientWidth = 446
+        TabOrder = 0
+        object SelVarLabel: TLabel
+          AnchorSideLeft.Control = PanelPage3
+          AnchorSideTop.Control = PanelPage3
+          Left = 0
+          Height = 15
+          Top = 0
+          Width = 83
+          Caption = 'Select Variables:'
+          ParentColor = False
+        end
+        object VarList: TListBox
+          AnchorSideLeft.Control = PanelPage3
+          AnchorSideTop.Control = SelVarLabel
+          AnchorSideTop.Side = asrBottom
+          AnchorSideRight.Control = Panel1
+          AnchorSideBottom.Control = PanelPage3
+          AnchorSideBottom.Side = asrBottom
+          Left = 0
+          Height = 206
+          Top = 17
+          Width = 246
+          Anchors = [akTop, akLeft, akRight, akBottom]
+          BorderSpacing.Top = 2
+          ItemHeight = 0
+          OnClick = VarListClick
+          TabOrder = 0
+        end
+        object Bevel1: TBevel
+          AnchorSideLeft.Control = PanelPage3
+          AnchorSideLeft.Side = asrCenter
+          Left = 200
+          Height = 13
+          Top = 2
+          Width = 46
+          Shape = bsSpacer
+        end
+        object Panel1: TPanel
+          AnchorSideLeft.Control = Bevel1
+          AnchorSideLeft.Side = asrBottom
+          AnchorSideRight.Control = PanelPage3
+          AnchorSideRight.Side = asrBottom
+          Left = 246
+          Height = 116
+          Top = 32
+          Width = 162
+          AutoSize = True
+          BevelOuter = bvNone
+          ClientHeight = 116
+          ClientWidth = 162
+          TabOrder = 1
+          object xlabel: TLabel
+            AnchorSideLeft.Control = Panel1
+            AnchorSideTop.Control = Xvar
+            AnchorSideTop.Side = asrCenter
+            Left = 48
+            Height = 15
+            Top = 4
+            Width = 18
+            Alignment = taRightJustify
+            BorderSpacing.Left = 48
+            Caption = 'X ='
+            ParentColor = False
+          end
+          object Xvar: TEdit
+            AnchorSideLeft.Control = xlabel
+            AnchorSideLeft.Side = asrBottom
+            AnchorSideTop.Control = Panel1
+            Left = 74
+            Height = 23
+            Top = 0
+            Width = 88
+            BorderSpacing.Left = 8
+            ReadOnly = True
+            TabOrder = 0
+            Text = 'Xvar'
+          end
+          object ylabel: TLabel
+            AnchorSideTop.Control = Yvar
+            AnchorSideTop.Side = asrCenter
+            AnchorSideRight.Control = xlabel
+            AnchorSideRight.Side = asrBottom
+            Left = 48
+            Height = 15
+            Top = 35
+            Width = 18
+            Alignment = taRightJustify
+            Anchors = [akTop, akRight]
+            BorderSpacing.Left = 8
+            Caption = 'Y ='
+            ParentColor = False
+          end
+          object Yvar: TEdit
+            AnchorSideLeft.Control = Xvar
+            AnchorSideTop.Control = Xvar
+            AnchorSideTop.Side = asrBottom
+            AnchorSideRight.Control = Xvar
+            AnchorSideRight.Side = asrBottom
+            Left = 74
+            Height = 23
+            Top = 31
+            Width = 88
+            Anchors = [akTop, akLeft, akRight]
+            BorderSpacing.Top = 8
+            ReadOnly = True
+            TabOrder = 1
+            Text = 'Edit1'
+          end
+          object zlabel: TLabel
+            AnchorSideTop.Control = Zvar
+            AnchorSideTop.Side = asrCenter
+            AnchorSideRight.Control = xlabel
+            AnchorSideRight.Side = asrBottom
+            Left = 48
+            Height = 15
+            Top = 66
+            Width = 18
+            Alignment = taRightJustify
+            Anchors = [akTop, akRight]
+            BorderSpacing.Left = 8
+            Caption = 'Z ='
+            ParentColor = False
+          end
+          object Zvar: TEdit
+            AnchorSideLeft.Control = Xvar
+            AnchorSideTop.Control = Yvar
+            AnchorSideTop.Side = asrBottom
+            AnchorSideRight.Control = Xvar
+            AnchorSideRight.Side = asrBottom
+            Left = 74
+            Height = 23
+            Top = 62
+            Width = 88
+            Anchors = [akTop, akLeft, akRight]
+            BorderSpacing.Top = 8
+            ReadOnly = True
+            TabOrder = 2
+            Text = 'Edit1'
+          end
+          object GroupLabel: TLabel
+            AnchorSideTop.Control = GroupVar
+            AnchorSideTop.Side = asrCenter
+            AnchorSideRight.Control = xlabel
+            AnchorSideRight.Side = asrBottom
+            Left = 22
+            Height = 15
+            Top = 97
+            Width = 44
+            Alignment = taRightJustify
+            Anchors = [akTop, akRight]
+            BorderSpacing.Left = 8
+            Caption = 'Group ='
+            ParentColor = False
+          end
+          object GroupVar: TEdit
+            AnchorSideLeft.Control = Xvar
+            AnchorSideTop.Control = Zvar
+            AnchorSideTop.Side = asrBottom
+            AnchorSideRight.Control = Xvar
+            AnchorSideRight.Side = asrBottom
+            Left = 74
+            Height = 23
+            Top = 93
+            Width = 88
+            Anchors = [akTop, akLeft, akRight]
+            BorderSpacing.Top = 8
+            ReadOnly = True
+            TabOrder = 3
+            Text = 'Edit1'
+          end
+        end
+      end
+    end
+  end
+  object Bevel2: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = ReturnBtn
+    Left = 0
+    Height = 8
+    Top = 342
+    Width = 462
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/twocorrsunit.pas

@@ -0,0 +1,679 @@
+unit TwoCorrsUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  ExtCtrls, StdCtrls,
+  MainUnit, Globals, FunctionsLib, OutputUnit, DataProcs, ContextHelpUnit;
+
+type
+
+  { TTwoCorrsFrm }
+
+  TTwoCorrsFrm = class(TForm)
+    Bevel1: TBevel;
+    Bevel2: TBevel;
+    HelpBtn: TButton;
+    Notebook1: TNotebook;
+    Page1: TPage;
+    Page2: TPage;
+    Page3: TPage;
+    Panel1: TPanel;
+    PanelPage1: TPanel;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    ReturnBtn: TButton;
+    CInterval: TEdit;
+    Label14: TLabel;
+    Xvar: TEdit;
+    Yvar: TEdit;
+    Zvar: TEdit;
+    GroupVar: TEdit;
+    xlabel: TLabel;
+    ylabel: TLabel;
+    zlabel: TLabel;
+    GroupLabel: TLabel;
+    SelVarLabel: TLabel;
+    VarList: TListBox;
+    PanelPage3: TPanel;
+    rxy1: TEdit;
+    Size1: TEdit;
+    rxy2: TEdit;
+    Size2: TEdit;
+    firstcorlabel: TLabel;
+    size1label: TLabel;
+    SecdCorLabel: TLabel;
+    Size2Label: TLabel;
+    rxy: TEdit;
+    rxz: TEdit;
+    ryz: TEdit;
+    SampSize: TEdit;
+    corxylabel: TLabel;
+    corxzlabel: TLabel;
+    coryzlabel: TLabel;
+    sampsizelabel: TLabel;
+    PanelPage2: TPanel;
+    RadioGroup1: TRadioGroup;
+    RadioGroup2: TRadioGroup;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure RadioGroup1Click(Sender: TObject);
+    procedure RadioGroup2Click(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    independent: boolean;
+    griddata: boolean;
+    function Validate(out AMsg: String; out AControl: TWinControl): Boolean;
+
+  public
+    { public declarations }
+  end; 
+
+var
+  TwoCorrsFrm: TTwoCorrsFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TTwoCorrsFrm }
+
+procedure TTwoCorrsFrm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  CInterval.Text := FormatFloat('0.0', DEFAULT_CONFIDENCE_LEVEL_PERCENT);
+
+  RadioGroup1.ItemIndex := 0;
+  RadioGroup2.ItemIndex := 0;
+  Notebook1.PageIndex := 0;
+  VarList.Clear;
+  Xvar.Text := '';
+  Yvar.Text := '';
+  Zvar.Text := '';
+  rxy.Text := '';
+  rxz.Text := '';
+  ryz.Text := '';
+  SampSize.Text := '';
+  rxy1.Text := '';
+  rxy2.Text := '';
+  Size1.Text := '';
+  Size2.Text := '';
+  zlabel.Visible := false;
+  Zvar.Visible := false;
+  GroupLabel.Visible := true;
+  GroupVar.Text := '';
+  GroupVar.Visible := true;
+  independent := true;
+  griddata := false;
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+end;
+
+procedure TTwoCorrsFrm.VarListClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if Xvar.Text = '' then
+  begin
+    Xvar.Text := VarList.Items.Strings[index];
+    exit;
+  end;
+
+  if Yvar.Text = '' then
+  begin
+    Yvar.Text := VarList.Items.Strings[index];
+    exit;
+  end;
+
+  if not independent then
+  begin
+    if Zvar.Text = '' then
+    begin
+      Zvar.Text := VarList.Items.Strings[index];
+      exit;
+    end;
+  end;
+
+  if independent then
+  begin
+    if GroupVar.Text = '' then
+    begin
+      GroupVar.Text := VarList.Items.Strings[index];
+      exit;
+    end;
+  end;
+end;
+
+procedure TTwoCorrsFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, ComputeBtn.Width, ReturnBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  ReturnBtn.Constraints.MinWidth := w;
+
+  Width := Max(
+    RadioGroup2.Left + RadioGroup2.Width + RadioGroup2.BorderSpacing.Right,
+    Width - HelpBtn.Left + HelpBtn.BorderSpacing.Left
+  );
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TTwoCorrsFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+end;
+
+procedure TTwoCorrsFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TTwoCorrsFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).tag);
+end;
+
+procedure TTwoCorrsFrm.ComputeBtnClick(Sender: TObject);
+var
+  Corxy, Corxz, Coryz, Cor1, Cor2, alpha, tvalue, df1, df2: double;
+  CorDif, zOne, zTwo, zDif, StdErr, zValue, zprobability: double;
+  UCL, LCL, ztest, ConfLevel, tprobability, ttest: double;
+  mean1, mean2, mean3, variance1, variance2, variance3: double;
+  stddev1, stddev2, stddev3, value1, value2, value3: double;
+  meanx1, meanx2, meany1, meany2, varx1, varx2, vary1, vary2: double;
+  sdx1, sdx2, sdy1, sdy2: double;
+  SSize1, SSize2, SSize, v1, v2, v3, grp, ncases, NoSelected: integer;
+  min, max, grpval, ncases1, ncases2, i: integer;
+  cellstring: string;
+  ColNoSelected: IntDyneVec;
+  msg: String;
+  C: TWinControl;
+  lReport: TStrings;
+begin
+  if not Validate(msg, C) then
+  begin
+    C.SetFocus;
+    MessageDlg(msg, mtError, [mbOK], 0);
+    ModalResult := mrNone;
+    exit;
+  end;
+
+  SetLength(ColNoSelected,NoVariables);
+  Corxy := 0.0;
+  Corxz := 0.0;
+  Coryz := 0.0;
+  Cor1 := 0.0;
+  Cor2 := 0.0;
+  mean1 := 0.0;
+  mean2 := 0.0;
+  mean3 := 0.0;
+  variance1 := 0.0;
+  variance2 := 0.0;
+  variance3 := 0.0;
+  meanx1 := 0.0;
+  meanx2 := 0.0;
+  meany1 := 0.0;
+  ConfLevel := StrToFloat(CInterval.Text) / 100.0;
+
+  // *** USE DATA ON THE FORM ***
+  if not griddata then
+  begin
+    // read data from form and obtain results
+    if independent then
+    begin
+      Cor1 := StrToFloat(rxy1.Text);
+      Cor2 := StrToFloat(rxy2.Text);
+      SSize1 := StrToInt(Size1.Text);
+      SSize2 := StrToInt(Size2.Text);
+      CorDif := Cor1 - Cor2;
+      zOne := 0.5 * ln((1.0 + Cor1) / (1.0 - Cor1));
+      zTwo := 0.5 * ln((1.0 + Cor2) / (1.0 - Cor2));
+      zDif := zOne - zTwo;
+      StdErr := sqrt((1.0 / (SSize1 - 3.0)) + (1.0 / (SSize2 -3.0)));
+      zValue := zDif / StdErr;
+      alpha := (1.0 - ConfLevel) / 2.0;
+      zTest := inversez(1.0 - alpha);
+      zprobability := 1.0 - probz(zValue);
+      UCL := zDif + StdErr * zTest;
+      LCL := zDif - StdErr * zTest;
+      UCL := (exp(2.0 * UCL) - 1.0) / (exp(2.0 * UCL) + 1.0);
+      LCL := (exp(2.0 * LCL) - 1.0) / (exp(2.0 * LCL) + 1.0);
+    end;
+
+    // obtain data from form and obtain results
+    if not independent then
+    begin
+      Corxy := StrToFloat(rxy.Text);
+      Corxz := StrToFloat(rxz.Text);
+      Coryz := StrToFloat(ryz.Text);
+      SSize := StrToInt(SampSize.Text);
+      CorDif := Corxy - Corxz;
+      alpha := (1.0 - ConfLevel) / 2.0;
+      tvalue := CorDif * sqrt((SSize - 3.0) * (1.0 + Coryz)) / sqrt(2.0 * (1.0 - Corxy*Corxy - Corxz*Corxz - Coryz*Coryz + 2.0*Corxy*Corxz*Coryz));
+      df1 := 1.0;
+      df2 := SSize - 3.0;
+      tprobability := probt(tvalue,df2);
+      ttest := inverset(1.0 - alpha, df2);
+    end;
+  end;
+
+  if griddata then
+  begin
+    v1 := 1;
+    v2 := 1;
+    grp := 1;
+
+    // read grid data for independent r's
+    if independent then
+    begin
+      for i := 1 to NoVariables do
+      begin
+        cellstring := OS3MainFrm.DataGrid.Cells[i,0];
+        if cellstring = Xvar.Text then v1 := i;
+        if cellstring = Yvar.Text then v2 := i;
+        if cellstring = GroupVar.Text then grp := i;
+      end;
+      ColNoSelected[0] := v1;
+      ColNoSelected[1] := v2;
+      ColNoSelected[2] := grp;
+      NoSelected := 3;
+      meanx1 := 0.0;
+      meany1 := 0.0;
+      varx1 := 0.0;
+      vary1 := 0.0;
+      meanx2 := 0.0;
+      meany2 := 0.0;
+      varx2 := 0.0;
+      vary2 := 0.0;
+      Cor1 := 0.0;
+      Cor2 := 0.0;
+      ncases1 := 0;
+      ncases2 := 0;
+      min := round(StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[grp,1])));
+      max := min;
+      for i := 2 to NoCases do
+      begin
+        if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        grpval := round(StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[grp,i])));
+        if grpval > max then max := grpval;
+        if grpval < min then min := grpval;
+      end;
+      for i := 1 to NoCases do
+      begin
+        if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        grpval := round(StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[grp,i])));
+        if grpval = min then
+        begin
+          ncases1 := ncases1 + 1;
+          value1 :=  StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v1,i]));
+          meanx1 := meanx1 + value1;
+          varx1 := varx1 + (value1 * value1);
+          value2 := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v2,i]));
+          meany1 := meany1 + value2;
+          vary1 := vary1 + value2 * value2;
+          Cor1 := Cor1 + value1 * value2;
+        end;
+        if grpval = max then
+        begin
+          ncases2 := ncases2 + 1;
+          value1 :=  StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v1,i]));
+          meanx2 := meanx2 + value1;
+          varx2 := varx2 + (value1 * value1);
+          value2 := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v2,i]));
+          meany2 := meany2 + value2;
+          vary2 := vary2 + value2 * value2;
+          Cor2 := Cor2 + value1 * value2;
+        end;
+      end;  // next case
+      varx1 := varx1 - meanx1 * meanx1 / ncases1;
+      varx1 := varx1 / (ncases1 - 1.0);
+      varx2 := varx2 - meanx2 * meanx2 / ncases2;
+      varx2 := varx2 / (ncases2 - 1.0);
+      vary1 := vary1 - meany1 * meany1 / ncases1;
+      vary1 := vary1 / (ncases1 - 1.0);
+      vary2 := vary2 - meany2 * meany2 / ncases2;
+      vary2 := vary2 / (ncases2 - 1.0);
+      Cor1 := Cor1 - meanx1 * meany1 / ncases1;
+      Cor1 := Cor1 / (ncases1 - 1.0);
+      Cor2 := Cor2 - meanx2 * meany2 / ncases2;
+      Cor2 := Cor2 / (ncases2 - 1.0);
+      sdx1 := sqrt(varx1);
+      sdx2 := sqrt(varx2);
+      sdy1 := sqrt(vary1);
+      sdy2 := sqrt(vary2);
+      Cor1 := Cor1 / (sdx1 * sdy1);
+      Cor2 := Cor2 / (sdx2 * sdy2);
+      meanx1 := meanx1 / ncases1;
+      meany1 := meany1 / ncases1;
+      meanx2 := meanx2 / ncases2;
+      meany2 := meany2 / ncases2;
+      SSize1 := ncases1;
+      SSize2 := ncases2;
+      CorDif := Cor1 - Cor2;
+      zOne := 0.5 * ln((1.0 + Cor1) / (1.0 - Cor1));
+      zTwo := 0.5 * ln((1.0 + Cor2) / (1.0 - Cor2));
+      zDif := zOne - zTwo;
+      StdErr := sqrt((1.0 / (SSize1 - 3.0)) + (1.0 / (SSize2 -3.0)));
+      zValue := zDif / StdErr;
+      alpha := (1.0 - ConfLevel) / 2.0;
+      zTest := inversez(1.0 - alpha);
+      zprobability := 1.0 - probz(zValue);
+      UCL := zDif + StdErr * zTest;
+      LCL := zDif - StdErr * zTest;
+      UCL := (exp(2.0 * UCL) - 1.0) / (exp(2.0 * UCL) + 1.0);
+      LCL := (exp(2.0 * LCL) - 1.0) / (exp(2.0 * LCL) + 1.0);
+    end;
+
+    // read grid data for dependent r's
+    if not independent then
+    begin
+      mean1 := 0.0;
+      mean2 := 0.0;
+      mean3 := 0.0;
+      variance1 := 0.0;
+      variance2 := 0.0;
+      variance3 := 0.0;
+      Corxy := 0.0;
+      Corxz := 0.0;
+      Coryz := 0.0;
+      ncases := 0;
+      for i := 1 to NoVariables do
+      begin
+        cellstring := OS3MainFrm.DataGrid.Cells[i,0];
+        if cellstring = Xvar.Text then v1 := i;
+        if cellstring = Yvar.Text then v2 := i;
+        if cellstring = ZVar.Text then v3 := i;
+      end;
+      ColNoSelected[0] := v1;
+      ColNoSelected[1] := v2;
+      ColNoSelected[2] := v3;
+      NoSelected := 3;
+      for i := 1 to NoCases do
+      begin
+        if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        ncases := ncases + 1;
+        value1 := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v1,i]));
+        value2 := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v2,i]));
+        value3 := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v3,i]));
+        mean1 := mean1 + value1;
+        mean2 := mean2 + value2;
+        mean3 := mean3 + value3;
+        variance1 := variance1 + value1 * value1;
+        variance2 := variance2 + value2 * value2;
+        variance3 := variance3 + value3 * value3;
+        Corxy := Corxy + value1 * value2;
+        Corxz := Corxz + value1 * value3;
+        Coryz := Coryz + value2 * value3;
+      end;
+      variance1 := variance1 - mean1 * mean1 / ncases;
+      variance1 := variance1 / (ncases - 1.0);
+      stddev1 := sqrt(variance1);
+      variance2 := variance2 - mean2 * mean2 / ncases;
+      variance2 := variance2 / (ncases - 1.0);
+      stddev2 := sqrt(variance2);
+      variance3 := variance3 - mean3 * mean3 / ncases;
+      variance3 := variance3 / (ncases - 1.0);
+      stddev3 := sqrt(variance3);
+      Corxy := Corxy - mean1 * mean2 / ncases;
+      Corxy := Corxy / (ncases - 1.0);
+      Corxy := Corxy / (stddev1 * stddev2);
+      Corxz := Corxz - mean1 * mean3 / ncases;
+      Corxz := Corxz / (ncases - 1.0);
+      Corxz := Corxz / (stddev1 * stddev3);
+      Coryz := Coryz - mean2 * mean3 / ncases;
+      Coryz := Coryz / (ncases - 1.0);
+      Coryz := Coryz / (stddev2 * stddev3);
+      mean1 := mean1 / ncases;
+      mean2 := mean2 / ncases;
+      mean3 := mean3 / ncases;
+      SSize := ncases;
+      CorDif := Corxy - Corxz;
+      alpha := (1.0 - ConfLevel) / 2.0;
+      tvalue := CorDif * sqrt((SSize - 3.0) * (1.0 + Coryz)) /
+                sqrt(2.0 * (1.0 - Corxy * Corxy - Corxz * Corxz - Coryz * Coryz + 2.0 * Corxy * Corxz * Coryz));
+      df1 := 1.0;
+      df2 := SSize - 3.0;
+      tprobability := probt(tvalue,df2);
+      ttest := inverset(1.0 - alpha, df2);
+    end;
+  end;
+
+  // Initialize output form
+  lReport := TStringList.Create;
+  try
+    lReport.Add('COMPARISON OF TWO CORRELATIONS');
+    lReport.Add('');
+    if independent then
+    begin
+      lReport.Add('Correlation one:                 %6.3f', [Cor1]);
+      lReport.Add('Sample size one:                 %6d', [SSize1]);
+      lReport.Add('Correlation two:                 %6.3f', [Cor2]);
+      lReport.Add('Sample size two:                 %6d', [SSize2]);
+      lReport.Add('Difference between correlations: %6.3f', [CorDif]);
+      lReport.Add('Confidence level selected:       %6s', [CInterval.Text]);
+      lReport.Add('z for Correlation One:           %6.3f', [zOne]);
+      lReport.Add('z for Correlation Two:           %6.3f', [zTwo]);
+      lReport.Add('z difference:                    %6.3f', [zDif]);
+      lReport.Add('Standard error of difference:    %6.3f', [StdErr]);
+      lReport.Add('z test statistic:                %6.3f', [zValue]);
+      lReport.Add('Probability > |z|:               %6.3f', [zprobability]);
+      lReport.Add('z Required for significance:     %6.3f', [zTest]);
+      lReport.Add('Note: above is a two-tailed test.');
+      lReport.Add('Confidence Limits = (%.3f ... %.3f)', [LCL, UCL]);
+      lReport.Add('');
+      if griddata then
+      begin
+        lReport.Add('Mean X for group 1:           %9.3f', [meanx1]);
+        lReport.Add('Mean X for group 2:           %9.3f', [meanx2]);
+        lReport.Add('Std.Dev. X for group 1:       %9.3f', [sdx1]);
+        lReport.Add('Std.Dev. X for group 2:       %9.3f', [sdx2]);
+        lReport.Add('Mean y for group 1;           %9.3f', [meany1]);
+        lReport.Add('Mean Y for group 2:           %9.3f', [meany2]);
+        lReport.Add('Std.Dev. Y for group 1:       %9.3f', [sdy1]);
+        lReport.Add('Std.Dev. Y for group 2:       %9.3f', [sdy2]);
+      end;
+    end;
+
+    if not independent then
+    begin
+      lReport.Add('Correlation x with y:       %6.3f', [Corxy]);
+      lReport.Add('Correlation x with z:       %6.3f', [Corxz]);
+      lReport.Add('Correlation y with z:       %6.3f', [Coryz]);
+      lReport.Add('Sample size:                %6d', [SSize]);
+      lReport.Add('Confidence Level Selected:  %6s', [CInterval.Text]);
+      lReport.Add('Difference r(x,y) - r(x,z): %6.3f', [CorDif]);
+      lReport.Add('t test statistic:           %6.3f', [tvalue]);
+      lReport.Add('Probability > |t|:          %6.3f', [tprobability]);
+      lReport.Add('t value for significance:   %6.3f', [ttest]);
+      lReport.Add('');
+      if griddata then
+      begin
+        lReport.Add('Variable Mean  Variance  Std.Dev.');
+        lReport.Add('   X     %9.3f %9.3f %9.3f', [mean1, variance1, stddev1]);
+        lReport.Add('   Y     %9.3f %9.3f %9.3f', [mean2, variance2, stddev2]);
+        lReport.Add('   Z     %9.3f %9.3f %9.3f', [mean3, variance3, stddev3]);
+      end;
+    end;
+
+    DisplayReport(lReport);
+
+  finally
+    lReport.Free;
+    ColNoSelected := nil;
+  end;
+end;
+
+procedure TTwoCorrsFrm.RadioGroup1Click(Sender: TObject);
+var
+  index: integer;
+begin
+  index := RadioGroup1.ItemIndex;
+  if index = 0 then
+  begin
+    griddata := false;
+    if independent then
+      Notebook1.PageIndex := 0
+    else
+      Notebook1.PageIndex := 1;
+  end else
+  begin
+    griddata := true;
+    Notebook1.PageIndex := 2;
+  end;
+end;
+
+procedure TTwoCorrsFrm.RadioGroup2Click(Sender: TObject);
+var
+  index1, index2: integer;
+begin
+  index1 := RadioGroup1.ItemIndex;
+  index2 := RadioGroup2.ItemIndex;
+
+  // form input with independent corrs
+  if ((index2 = 0) and (index1 = 0)) then
+  begin
+    independent := true;
+    Notebook1.PageIndex := 0;
+  end;
+
+  // grid data for independent corrs
+  if ((index2 = 0) and (index1 = 1)) then
+  begin
+    Notebook1.PageIndex := 2;
+    zlabel.Visible := false;
+    zvar.Visible := false;
+    grouplabel.Visible := true;
+    groupvar.Visible := true;
+  end;
+
+  // form data for dependent corrs
+  if ((index2 = 1) and (index1 = 0)) then
+  begin
+    Notebook1.PageIndex := 1;
+  end;
+
+  // grid data for dependent corrs
+  if ((index2 = 1) and (index1 = 1)) then
+  begin
+    Notebook1.PageIndex := 2;
+    independent := false;
+    zlabel.Visible := true;
+    Zvar.Visible := true;
+    GroupLabel.Visible := false;
+    GroupVar.Visible := false;
+  end;
+end;
+
+function TTwoCorrsFrm.Validate(out AMsg: String; out AControl: TWinControl): Boolean;
+var
+  n: Integer;
+  x: Double;
+begin
+  Result := false;
+  AControl := nil;
+  AMsg := '';
+  if Notebook1.PageIndex = 0 then
+  begin
+    if (rxy1.Text = '') or not TryStrToFloat(rxy1.Text, x) then
+    begin
+      AControl := rxy1;
+      AMsg := 'Invalid input for first correlation';
+      exit;
+    end;
+    if (Size1.Text = '') or not TryStrToInt(Size1.Text, n) or (n <= 0) then
+    begin
+      AControl := Size1;
+      AMsg := 'Invald input for size of sample 1';
+      exit;
+    end;
+    if (rxy2.Text = '') or not TryStrToFloat(rxy2.Text, x) then
+    begin
+      AControl := rxy2;
+      AMsg := 'Invalid input for second correlation';
+      exit;
+    end;
+    if (Size2.Text = '') or not TryStrToInt(Size2.Text, n) or (n <= 0) then
+    begin
+      AControl := Size2;
+      AMsg := 'Invalud input for size of sample 2';
+      exit;
+    end;
+  end else
+  if Notebook1.PageIndex = 1 then
+  begin
+    if (rxy.Text = '') or not TryStrToFloat(rxy.Text, x) then
+      AControl := rxy
+    else
+    if (rxz.Text = '') or not TryStrToFloat(rxz.Text, x) then
+      AControl := rxz
+    else
+    if (ryz.Text = '') or not TryStrToFloat(ryz.Text, x) then
+      AControl := ryz
+    else
+    if (SampSize.Text = '') or not TryStrToInt(SampSize.Text, n) or (n < 0) then
+      AControl := SampSize;
+    if AControl <> nil then
+    begin
+      AMsg := 'Invalid input.';
+      exit;
+    end;
+  end else
+  if Notebook1.PageIndex = 2 then
+  begin
+    if XVar.Text = '' then
+    begin
+      AControl := XVar;
+      AMsg := 'X variable not specified.';
+      exit;
+    end;
+    if YVar.Text = '' then
+    begin
+      AControl := YVar;
+      AMsg := 'Y variable not specified.';
+      exit;
+    end;
+    case RadioGroup2.ItemIndex of
+      0: if (GroupVar.Text = '') then
+         begin
+           AControl := GroupVar;
+           AMsg := 'Group variable not specified';
+           exit;
+         end;
+      1: if (ZVar.Text = '') then begin
+           AControl := ZVar;
+           AMsg := 'Z variable not specified.';
+           exit;
+         end;
+    end;
+  end;
+  Result := true;
+end;
+
+initialization
+  {$I twocorrsunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/comparisons/twopropunit.lfm

@@ -0,0 +1,585 @@
+object TwoPropFrm: TTwoPropFrm
+  Left = 603
+  Height = 427
+  Top = 225
+  Width = 455
+  Caption = 'Test of Equality for two Proportions'
+  ClientHeight = 427
+  ClientWidth = 455
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  LCLVersion = '2.1.0.0'
+  object ConfLabel: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = CInterval
+    AnchorSideTop.Side = asrCenter
+    AnchorSideRight.Control = CInterval
+    Left = 8
+    Height = 15
+    Top = 359
+    Width = 149
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    Caption = 'Percent Confidence Interval:'
+    ParentColor = False
+  end
+  object CInterval: TEdit
+    AnchorSideLeft.Control = ConfLabel
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel4
+    Left = 165
+    Height = 23
+    Top = 355
+    Width = 41
+    Alignment = taRightJustify
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Right = 8
+    TabOrder = 1
+    Text = '95.0'
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 242
+    Height = 25
+    Top = 394
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 3
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 304
+    Height = 25
+    Top = 394
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 4
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 388
+    Height = 25
+    Top = 394
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 5
+  end
+  object HelpBtn: TButton
+    Tag = 152
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 183
+    Height = 25
+    Top = 394
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 2
+  end
+  object Notebook1: TNotebook
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Panel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CInterval
+    Left = 8
+    Height = 259
+    Top = 88
+    Width = 439
+    PageIndex = 1
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    TabOrder = 0
+    object Page1: TPage
+      AnchorSideTop.Side = asrBottom
+      object Label11: TLabel
+        AnchorSideLeft.Control = Page1
+        AnchorSideTop.Control = Page1
+        Left = 0
+        Height = 15
+        Top = 0
+        Width = 83
+        Caption = 'Select Variables:'
+        ParentColor = False
+      end
+      object FirstVarLabel: TLabel
+        AnchorSideLeft.Control = Bevel1
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = VarList
+        Left = 223
+        Height = 15
+        Top = 17
+        Width = 66
+        Caption = 'First Variable'
+        ParentColor = False
+      end
+      object SecdVarLabel: TLabel
+        AnchorSideLeft.Control = Bevel1
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideBottom.Control = Var2
+        Left = 223
+        Height = 15
+        Top = 110
+        Width = 83
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Second Variable'
+        ParentColor = False
+      end
+      object GrpLabel: TLabel
+        AnchorSideLeft.Control = Bevel1
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideBottom.Control = Grp
+        Left = 223
+        Height = 15
+        Top = 219
+        Width = 64
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Group Code'
+        ParentColor = False
+      end
+      object VarList: TListBox
+        AnchorSideLeft.Control = Page1
+        AnchorSideTop.Control = Label11
+        AnchorSideTop.Side = asrBottom
+        AnchorSideRight.Control = Bevel1
+        AnchorSideBottom.Control = Page1
+        AnchorSideBottom.Side = asrBottom
+        Left = 0
+        Height = 242
+        Top = 17
+        Width = 215
+        Anchors = [akTop, akLeft, akRight, akBottom]
+        BorderSpacing.Top = 2
+        Constraints.MinHeight = 220
+        ItemHeight = 0
+        OnClick = VarListClick
+        TabOrder = 0
+      end
+      object Var1: TEdit
+        AnchorSideLeft.Control = Bevel1
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = FirstVarLabel
+        AnchorSideTop.Side = asrBottom
+        AnchorSideRight.Control = Page1
+        AnchorSideRight.Side = asrBottom
+        Left = 223
+        Height = 23
+        Top = 34
+        Width = 216
+        Anchors = [akTop, akLeft, akRight]
+        BorderSpacing.Top = 2
+        ReadOnly = True
+        TabOrder = 1
+        Text = 'Var1'
+      end
+      object Var2: TEdit
+        AnchorSideLeft.Control = Bevel1
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = VarList
+        AnchorSideTop.Side = asrCenter
+        AnchorSideRight.Control = Page1
+        AnchorSideRight.Side = asrBottom
+        Left = 223
+        Height = 23
+        Top = 127
+        Width = 216
+        Anchors = [akTop, akLeft, akRight]
+        ReadOnly = True
+        TabOrder = 2
+        Text = 'Var2'
+      end
+      object Grp: TEdit
+        AnchorSideLeft.Control = Bevel1
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = Page1
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = VarList
+        AnchorSideBottom.Side = asrBottom
+        Left = 223
+        Height = 23
+        Top = 236
+        Width = 216
+        Anchors = [akLeft, akRight, akBottom]
+        ReadOnly = True
+        TabOrder = 3
+        Text = 'Grp'
+      end
+      object Bevel1: TBevel
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        Left = 215
+        Height = 49
+        Top = 53
+        Width = 8
+        Shape = bsSpacer
+      end
+    end
+    object Page2: TPage
+      object Panel4: TPanel
+        AnchorSideTop.Control = Page2
+        Left = 24
+        Height = 62
+        Top = 16
+        Width = 344
+        AutoSize = True
+        BorderSpacing.Top = 16
+        BevelOuter = bvNone
+        ChildSizing.HorizontalSpacing = 8
+        ChildSizing.VerticalSpacing = 12
+        ChildSizing.Layout = cclLeftToRightThenTopToBottom
+        ChildSizing.ControlsPerLine = 5
+        ClientHeight = 62
+        ClientWidth = 344
+        TabOrder = 0
+        object Samp1Label: TLabel
+          AnchorSideTop.Side = asrCenter
+          Left = 0
+          Height = 23
+          Top = 4
+          Width = 77
+          Caption = 'Sample 1 Freq.'
+          ParentColor = False
+        end
+        object IndFreq1: TEdit
+          Left = 85
+          Height = 23
+          Top = 4
+          Width = 80
+          Alignment = taRightJustify
+          TabOrder = 0
+          Text = 'IndFreq1'
+        end
+        object Bevel2: TBevel
+          Left = 173
+          Height = 10
+          Top = 4
+          Width = 10
+          Constraints.MaxHeight = 10
+          Constraints.MaxWidth = 10
+          Shape = bsSpacer
+        end
+        object Samp1SizeLabel: TLabel
+          AnchorSideTop.Side = asrCenter
+          Left = 191
+          Height = 23
+          Top = 4
+          Width = 65
+          BorderSpacing.Top = 4
+          Caption = 'Sample Size:'
+          ParentColor = False
+        end
+        object IndSize1: TEdit
+          Left = 264
+          Height = 23
+          Top = 4
+          Width = 80
+          Alignment = taRightJustify
+          TabOrder = 1
+          Text = 'IndSize1'
+        end
+        object Samp2Label: TLabel
+          Left = 0
+          Height = 23
+          Top = 39
+          Width = 77
+          Caption = 'Sample 2 Freq.'
+          ParentColor = False
+        end
+        object IndFreq2: TEdit
+          Left = 85
+          Height = 23
+          Top = 39
+          Width = 80
+          Alignment = taRightJustify
+          TabOrder = 2
+          Text = 'IndFreq2'
+        end
+        object Bevel3: TBevel
+          Left = 173
+          Height = 10
+          Top = 39
+          Width = 10
+          Constraints.MaxHeight = 10
+          Constraints.MaxWidth = 10
+          Shape = bsSpacer
+        end
+        object Samp2SizeLabel: TLabel
+          Left = 191
+          Height = 23
+          Top = 39
+          Width = 65
+          Caption = 'Sample Size:'
+          ParentColor = False
+        end
+        object IndSize2: TEdit
+          Left = 264
+          Height = 23
+          Top = 39
+          Width = 80
+          Alignment = taRightJustify
+          TabOrder = 3
+          Text = 'IndSize2'
+        end
+      end
+    end
+    object Page3: TPage
+      object DepSamp2Label: TLabel
+        AnchorSideLeft.Control = Page3
+        Left = 8
+        Height = 15
+        Top = 72
+        Width = 45
+        BorderSpacing.Left = 8
+        Caption = 'Sample2'
+        ParentColor = False
+      end
+      object DepSamp1Label: TLabel
+        AnchorSideTop.Control = Page3
+        Left = 168
+        Height = 15
+        Top = 0
+        Width = 45
+        Caption = 'Sample1'
+        ParentColor = False
+      end
+      object Panel3: TPanel
+        AnchorSideTop.Control = DepSamp1Label
+        AnchorSideTop.Side = asrBottom
+        Left = 72
+        Height = 85
+        Top = 23
+        Width = 201
+        BorderSpacing.Top = 8
+        BevelOuter = bvNone
+        ChildSizing.HorizontalSpacing = 16
+        ChildSizing.VerticalSpacing = 12
+        ChildSizing.Layout = cclLeftToRightThenTopToBottom
+        ChildSizing.ControlsPerLine = 3
+        ClientHeight = 85
+        ClientWidth = 201
+        TabOrder = 0
+        object LabelCorner: TLabel
+          Left = 0
+          Height = 15
+          Top = 0
+          Width = 9
+          Caption = '   '
+          ParentColor = False
+        end
+        object Samp10Label: TLabel
+          Left = 25
+          Height = 15
+          Top = 0
+          Width = 80
+          Alignment = taCenter
+          Caption = '0'
+          ParentColor = False
+        end
+        object Samp11Label: TLabel
+          Left = 121
+          Height = 15
+          Top = 0
+          Width = 80
+          Alignment = taCenter
+          Caption = '1'
+          ParentColor = False
+        end
+        object Samp20Label: TLabel
+          Left = 0
+          Height = 23
+          Top = 27
+          Width = 9
+          Caption = '0'
+          Layout = tlCenter
+          ParentColor = False
+        end
+        object DepFreq00: TEdit
+          Left = 25
+          Height = 23
+          Top = 27
+          Width = 80
+          Alignment = taRightJustify
+          TabOrder = 0
+          Text = 'DepFreq00'
+        end
+        object DepFreq10: TEdit
+          Left = 121
+          Height = 23
+          Top = 27
+          Width = 80
+          Alignment = taRightJustify
+          TabOrder = 1
+          Text = 'DepFreq10'
+        end
+        object Samp21Label: TLabel
+          Left = 0
+          Height = 23
+          Top = 62
+          Width = 9
+          Caption = '1'
+          Layout = tlCenter
+          ParentColor = False
+        end
+        object DepFreq01: TEdit
+          Left = 25
+          Height = 23
+          Top = 62
+          Width = 80
+          Alignment = taRightJustify
+          TabOrder = 2
+          Text = 'DepFreq01'
+        end
+        object DepFreq11: TEdit
+          Left = 121
+          Height = 23
+          Top = 62
+          Width = 80
+          Alignment = taRightJustify
+          TabOrder = 3
+          Text = 'DepFreq11'
+        end
+      end
+    end
+  end
+  object Bevel4: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 378
+    Width = 455
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 0
+    Height = 80
+    Top = 0
+    Width = 455
+    Anchors = [akTop, akLeft, akRight]
+    AutoSize = True
+    BevelOuter = bvNone
+    ClientHeight = 80
+    ClientWidth = 455
+    TabOrder = 6
+    object RadioGroup1: TRadioGroup
+      AnchorSideTop.Control = Panel1
+      AnchorSideRight.Control = Bevel5
+      Left = 16
+      Height = 72
+      Top = 8
+      Width = 203
+      Anchors = [akTop, akRight]
+      AutoFill = True
+      AutoSize = True
+      BorderSpacing.Top = 8
+      Caption = 'Data Entry By:'
+      ChildSizing.LeftRightSpacing = 16
+      ChildSizing.TopBottomSpacing = 6
+      ChildSizing.VerticalSpacing = 2
+      ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+      ChildSizing.EnlargeVertical = crsHomogenousChildResize
+      ChildSizing.ShrinkHorizontal = crsScaleChilds
+      ChildSizing.ShrinkVertical = crsScaleChilds
+      ChildSizing.Layout = cclLeftToRightThenTopToBottom
+      ChildSizing.ControlsPerLine = 1
+      ClientHeight = 52
+      ClientWidth = 199
+      Items.Strings = (
+        'Values Entered on this Form'
+        'Values in the Data Grid'
+      )
+      OnClick = RadioGroup1Click
+      TabOrder = 0
+    end
+    object RadioGroup2: TRadioGroup
+      AnchorSideLeft.Control = Bevel5
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = Panel1
+      Left = 235
+      Height = 72
+      Top = 8
+      Width = 188
+      AutoFill = True
+      AutoSize = True
+      BorderSpacing.Top = 8
+      Caption = 'Test Assumptions:'
+      ChildSizing.LeftRightSpacing = 16
+      ChildSizing.TopBottomSpacing = 6
+      ChildSizing.VerticalSpacing = 2
+      ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+      ChildSizing.EnlargeVertical = crsHomogenousChildResize
+      ChildSizing.ShrinkHorizontal = crsScaleChilds
+      ChildSizing.ShrinkVertical = crsScaleChilds
+      ChildSizing.Layout = cclLeftToRightThenTopToBottom
+      ChildSizing.ControlsPerLine = 1
+      ClientHeight = 52
+      ClientWidth = 184
+      Items.Strings = (
+        'Independent Proportions'
+        'Dependent Proportions'
+      )
+      OnClick = RadioGroup2Click
+      TabOrder = 1
+    end
+    object Bevel5: TBevel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = Panel1
+      Left = 219
+      Height = 41
+      Top = 0
+      Width = 16
+      Shape = bsSpacer
+    end
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/twopropunit.pas

@@ -0,0 +1,541 @@
+unit TwoPropUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls,
+  Graphics, Dialogs, ExtCtrls, StdCtrls, ComCtrls, MainUnit, Globals,
+  FunctionsLib, OutPutUnit, DataProcs, contexthelpunit;
+
+type
+
+  { TTwoPropFrm }
+
+  TTwoPropFrm = class(TForm)
+    Bevel1: TBevel;
+    Bevel2: TBevel;
+    Bevel3: TBevel;
+    Bevel4: TBevel;
+    Bevel5: TBevel;
+    HelpBtn: TButton;
+    LabelCorner: TLabel;
+    Notebook1: TNotebook;
+    Page1: TPage;
+    Page2: TPage;
+    Page3: TPage;
+    Panel1: TPanel;
+    Panel3: TPanel;
+    Panel4: TPanel;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    CloseBtn: TButton;
+    DepFreq00: TEdit;
+    DepFreq10: TEdit;
+    DepFreq01: TEdit;
+    DepFreq11: TEdit;
+    CInterval: TEdit;
+    Grp: TEdit;
+    GrpLabel: TLabel;
+    ConfLabel: TLabel;
+    Var2: TEdit;
+    SecdVarLabel: TLabel;
+    Var1: TEdit;
+    IndSize2: TEdit;
+    IndSize1: TEdit;
+    IndFreq2: TEdit;
+    IndFreq1: TEdit;
+    Samp1Label: TLabel;
+    Samp21Label: TLabel;
+    Label11: TLabel;
+    FirstVarLabel: TLabel;
+    Samp2Label: TLabel;
+    Samp1SizeLabel: TLabel;
+    Samp2SizeLabel: TLabel;
+    DepSamp2Label: TLabel;
+    DepSamp1Label: TLabel;
+    Samp10Label: TLabel;
+    Samp11Label: TLabel;
+    Samp20Label: TLabel;
+    VarList: TListBox;
+    RadioGroup1: TRadioGroup;
+    RadioGroup2: TRadioGroup;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure RadioGroup1Click(Sender: TObject);
+    procedure RadioGroup2Click(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    independent: boolean;
+    griddata: boolean;
+    function Validate(out AMsg: String; out AControl: TWinControl): Boolean;
+
+  public
+    { public declarations }
+  end; 
+
+var
+  TwoPropFrm: TTwoPropFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TTwoPropFrm }
+
+procedure TTwoPropFrm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  CInterval.Text := FormatFloat('0.0', DEFAULT_CONFIDENCE_LEVEL_PERCENT);
+
+  RadioGroup1.ItemIndex := 0;
+  RadioGroup2.ItemIndex := 0;
+  VarList.Clear;
+  Var1.Text := '';
+  Var2.Text := '';
+  independent := true;
+  griddata := false;
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  GrpLabel.Visible := true;
+  Grp.Visible := true;
+  Grp.Text := '';
+  Var2.Visible := false;
+  SecdVarLabel.Visible := false;
+  DepFreq00.Text := '';
+  DepFreq01.Text := '';
+  DepFreq10.Text := '';
+  DepFreq11.Text := '';
+  IndFreq1.Text := '';
+  IndFreq2.Text := '';
+  IndSize1.Text := '';
+  IndSize2.Text := '';
+
+  Notebook1.PageIndex := 1;
+end;
+
+procedure TTwoPropFrm.VarListClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if not independent then
+  begin
+    if Var1.Text <> '' then
+      Var2.Text := VarList.Items[index]
+    else
+      Var1.Text := VarList.Items[index];
+  end;
+
+  if independent then
+  begin
+    if Var1.Text <> '' then
+      Grp.Text := VarList.Items[index]
+    else
+      Var1.Text := VarList.Items[index];
+  end;
+end;
+
+procedure TTwoPropFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TTwoPropFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).tag);
+end;
+
+procedure TTwoPropFrm.ComputeBtnClick(Sender: TObject);
+var
+  ConfInt, Prop1, Prop2, zstatistic, zprobability: double;
+  PropDif, stderr, UCL, LCL, value1, value2, ztest: double;
+  P, Q: double;
+  i, v1, v2, NoSelected, f1, f2, f3, f4, ncases1, ncases2: integer;
+  min, max, group, AB, AC, CD, BD: integer;
+  ColNoSelected: IntDyneVec;
+  msg: String;
+  C: TWinControl;
+  lReport: TStrings;
+begin
+  if not Validate(msg, C) then
+  begin
+    C.SetFocus;
+    MessageDlg(msg, mtError, [mbOK], 0);
+    ModalResult := mrNone;
+    exit;
+  end;
+
+  // Initialize output form
+  stderr := 0.0;
+  PropDif := 0.0;
+  v2 := 0;
+  ztest := 0.0;
+  Prop1 := 0.0;
+  Prop2 := 0.0;
+  NoSelected := 0;
+  v1 := 0;
+  zstatistic := 0.0;
+  zprobability := 0.0;
+  UCL := 0.0;
+  LCL := 0.0;
+
+  SetLength(ColNoSelected,NoVariables);
+
+  ConfInt := (100.0 - StrToFloat(CInterval.Text)) / 2.0 ;
+  ConfInt := (100.0 - ConfInt) / 100.0; // one tail
+  ncases1 := 0;
+  ncases2 := 0;
+  f1 := 0;
+  f2 := 0;
+  f3 := 0;
+  f4 := 0;
+  if independent then
+    Var2.Text := Grp.Text;
+
+  if griddata then // data read from grid
+  begin
+    for i := 1 to NoVariables do
+    begin
+      if Var1.Text = OS3MainFrm.DataGrid.Cells[i,0] then
+      begin
+        v1 := i;
+        ColNoSelected[0] := i;
+      end;
+
+      if Var2.Text = OS3MainFrm.DataGrid.Cells[i,0] then
+      begin
+        v2 := i;
+        ColNoSelected[1] := i;
+      end;
+    end; // next variable
+
+    if not independent then // correlated data
+    begin
+      for i := 1 to NoCases do
+      begin
+        if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        ncases1 := ncases1 + 1;
+        value1 := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v1,i]));
+        value2 := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v2,i]));
+        f1 := f1 + round(value1);
+        f2 := f2 + round(value2);
+      end; // next case
+      f3 := ncases1 - f1;
+      f4 := ncases1 - f2;
+      AB := f1 + f2;
+      AC := f1 + f3;
+      CD := f3 + f4;
+      BD := f2 + f4;
+      Prop1 := BD / ncases1;
+      Prop2 := AB / ncases1;
+      stderr := sqrt((f1 / ncases1 + f4 / ncases1) / ncases1);
+      PropDif := Prop1 - Prop2;
+      zstatistic := PropDif / stderr;
+      ztest := inversez(ConfInt);
+      zprobability := 1.0 - probz(abs(zstatistic));
+      UCL := PropDif + stderr * ztest;
+      LCL := PropDif - stderr * ztest;
+    end; // if not independent
+
+    if independent then
+    begin
+      min := round(StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v2,1])));
+      max := min;
+      for i := 2 to NoCases do
+      begin
+        if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        group := round(StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v2,i])));
+        if group < min then min := group;
+        if group > max then max := group;
+      end;
+
+      for i := 1 to NoCases do
+      begin
+        if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        value1 := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v1,i]));
+        group := round(StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[v2,i])));
+        if group = min then
+        begin
+          f1 := f1 + round(value1);
+          ncases1 := ncases1 + 1;
+        end else
+        begin
+          f2 := f2 + round(value1);
+          ncases2 := ncases2 + 1;
+        end;
+      end; // next case
+
+      Prop1 := f1 / ncases1;
+      Prop2 := f2 / ncases2;
+      PropDif := Prop1 - Prop2;
+      P := (f1 + f2) / (ncases1 + ncases2);
+      Q := 1.0 - P;
+      stderr := sqrt(P * Q * ((1.0 / ncases1) + (1.0 / ncases2)));
+      zstatistic := (Prop1 - Prop2) / stderr;
+      zprobability := 1.0 - probz(abs(zstatistic));
+      ztest := inversez(ConfInt);
+      UCL := PropDif + ztest * stderr;
+      LCL := PropDif - ztest * stderr;
+    end; // end if independent
+  end; // if reading grid data
+
+  if not griddata then // data read from form
+  begin
+    if not independent then // correlated data
+    begin
+      f1 := round(StrToFloat(DepFreq00.Text));
+      f2 := round(StrToFloat(DepFreq10.Text));
+      f3 := round(StrToFloat(DepFreq01.Text));
+      f4 := round(StrToFloat(DepFreq11.Text));
+      ncases1 := f1 + f2 + f3 + f4;
+      AB := f1 + f2;
+      AC := f1 + f3;
+      CD := f3 + f4;
+      BD := f2 + f4;
+      Prop1 := BD / ncases1;
+      Prop2 := AB / ncases1;
+      stderr := sqrt((f1 / ncases1 + f4 / ncases1) / ncases1);
+      PropDif := Prop1 - Prop2;
+      zstatistic := PropDif / stderr;
+      ztest := inversez(ConfInt);
+      zprobability := 1.0 - probz(abs(zstatistic));
+      UCL := PropDif + stderr * ztest;
+      LCL := PropDif - stderr * ztest;
+    end; // if not independent
+
+    if independent then // independent data
+    begin
+      f1 := StrToInt(IndFreq1.Text);
+      f2 := StrToInt(IndFreq2.Text);
+      ncases1 := StrToInt(IndSize1.Text);
+      ncases2 := StrToInt(IndSize2.Text);
+      Prop1 := f1 / ncases1;
+      Prop2 := f2 / ncases2;
+      PropDif := Prop1 - Prop2;
+      P := (f1 + f2) / (ncases1 + ncases2);
+      Q := 1.0 - P;
+      stderr := sqrt(P * Q * ((1.0 / ncases1) + (1.0 / ncases2)));
+      zstatistic := (Prop1 - Prop2) / stderr;
+      zprobability := 1.0 - probz(abs(zstatistic));
+      ztest := inversez(ConfInt);
+      UCL := PropDif + ztest * stderr;
+      LCL := PropDif - ztest * stderr;
+    end;
+  end;
+
+  // Print the results
+  lReport := TStringList.Create;
+  try
+    lReport.Add('COMPARISON OF TWO PROPORTIONS');
+    lReport.Add('');
+    if not independent then
+    begin
+      lReport.Add('Test for Difference Between Two Dependent Proportions');
+      lReport.Add('');
+      lReport.Add('Entered Values');
+      lReport.Add('');
+      lReport.Add('Sample               1');
+      lReport.Add('                 0      1    sum');
+      lReport.Add('           -----------------------');
+      lReport.Add('       0  |%5d   %5d   %5d |', [f1, f2, AB]);
+      lReport.Add('  2        --------|-------|------');
+      lReport.Add('       1  |%5d   %5d   %5d |', [f3, f4, CD]);
+      lReport.Add('           --------|-------|------');
+      lReport.Add(' sum      | %5d  %5d   %5d |', [AC, BD, ncases1]);
+      lReport.Add('');
+      lReport.Add('Confidence Level selected: %s', [CInterval.Text]);
+      lReport.Add('Proportion 1 = %.3f and Proportion 2 = %.3f with %d cases', [Prop1, Prop2, ncases1]);
+      lReport.Add('Difference in proportions:       %9.3f', [PropDif]);
+      lReport.Add('Standard Error of Difference:    %9.3f', [stderr]);
+      lReport.Add('z test statistic:                %9.3f with probability = %.4f', [zstatistic, zprobability]);
+      lReport.Add('z value for confidence interval: %9.3f', [ztest]);
+      lReport.Add('Confidence Interval: (%.3f, %.3f)', [LCL, UCL]);
+    end;
+
+    if independent then
+    begin
+      lReport.Add('Test for Difference Between Two Independent Proportions');
+      lReport.Add('');
+      lReport.Add('Entered Values');
+      lReport.Add('');
+      lReport.Add('Sample 1: Frequency = %5d for %5d cases.', [f1, ncases1]);
+      lReport.Add('Sample 2: Frequency = %5d for %5d cases.', [f2, ncases2]);
+      lReport.Add('');
+      lReport.Add('Proportion 1:                    %9.3f', [Prop1]);
+      lReport.Add('Proportion 2:                    %9.3f', [Prop2]);
+      lReport.Add('Difference:                      %9.3f', [PropDif]);
+      lReport.Add('Standard Error of Difference:    %9.3f', [stderr]);
+      lReport.Add('Confidence Level selected:       %9s', [CInterval.Text]);
+      lReport.Add('z test statistic:                %9.3f with probability = %.4f', [zstatistic, zprobability]);
+      lReport.Add('z value for confidence interval: %9.3f', [ztest]);
+      lReport.Add('Confidence Interval: (%.3f, %.3f)', [LCL, UCL]);
+    end;
+
+    DisplayReport(lReport);
+
+  finally
+    lReport.Free;
+    ColNoSelected := nil;
+  end;
+end;
+
+procedure TTwoPropFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  RadioGroup2.Constraints.MinWidth := RadioGroup1.Width;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  Width := Max(
+    RadioGroup2.Left + RadioGroup2.Width + RadioGroup2.BorderSpacing.Right,
+    Width - HelpBtn.Left + HelpBtn.BorderSpacing.Left
+  );
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TTwoPropFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+end;
+
+procedure TTwoPropFrm.RadioGroup1Click(Sender: TObject);
+begin
+     griddata := RadioGroup1.ItemIndex = 1;
+     RadioGroup2Click(nil);
+end;
+
+procedure TTwoPropFrm.RadioGroup2Click(Sender: TObject);
+begin
+     case RadioGroup2.ItemIndex of
+       0: begin
+            independent := true;
+            if griddata then begin
+              Notebook1.PageIndex := 0;
+              Var2.Visible := false;
+              Grp.Visible := true;
+              SecdVarLabel.Visible := Var2.Visible;
+              GrpLabel.Visible := Grp.Visible;
+            end else
+              Notebook1.PageIndex := 1;
+          end;
+       1: begin
+            independent := false;
+            if griddata then begin
+              Notebook1.PageIndex := 0;
+              Var2.Visible := true;
+              Grp.Visible := false;
+              SecdVarLabel.Visible := Var2.Visible;
+              GrpLabel.Visible := Grp.Visible;
+            end else
+              Notebook1.PageIndex := 2;
+          end;
+     end;
+end;
+
+function TTwoPropFrm.Validate(out AMsg: String; out AControl: TWinControl): Boolean;
+var
+  n: Integer;
+begin
+  Result := false;
+  AControl := nil;
+  AMsg := '';
+  if Notebook1.PageIndex = 0 then
+  begin
+    if Var1.Text = '' then
+    begin
+      AControl := Var1;
+      AMsg := 'First variable not specified.';
+      exit;
+    end;
+    case RadioGroup2.ItemIndex of
+      0: if (Grp.Text = '') then
+         begin
+           AControl := Grp;
+           AMsg := 'Group code not specified';
+           exit;
+         end;
+      1: if (Var2.Text = '') then begin
+           AControl := Var2;
+           AMsg := 'Second variable not specified.';
+           exit;
+         end;
+    end;
+  end else
+  if Notebook1.PageIndex = 1 then
+  begin
+    if (IndFreq1.Text = '') or not TryStrToInt(IndFreq1.Text, n) or (n < 0) then
+    begin
+      AControl := IndFreq1;
+      AMsg := 'Invalid input for Sample 1 frequency';
+      exit;
+    end;
+    if (IndFreq2.Text = '') or not TryStrToInt(IndFreq2.Text, n) or (n < 0) then
+    begin
+      AControl := IndFreq2;
+      AMsg := 'Invalid input for Sample 2 frequency';
+      exit;
+    end;
+    if (IndSize1.Text = '') or not TryStrToInt(IndSize1.Text, n) or (n <= 0) then
+    begin
+      AControl := IndSize1;
+      AMsg := 'Invald input for size of sample 1';
+      exit;
+    end;
+    if (IndSize2.Text = '') or not TryStrToInt(IndSize2.Text, n) or (n <= 0) then
+    begin
+      AControl := IndSize2;
+      AMsg := 'Invalud input for size of sample 2';
+      exit;
+    end;
+  end else
+  if Notebook1.PageIndex = 2 then
+  begin
+    if (DepFreq00.Text = '') or not TryStrToInt(DepFreq00.Text, n) or (n < 0) then
+      AControl := DepFreq00
+    else
+    if (DepFreq01.Text = '') or not TryStrToInt(DepFreq01.Text, n) or (n < 0) then
+      AControl := DepFreq01
+    else
+    if (DepFreq10.Text = '') or not TryStrToInt(DepFreq10.Text, n) or (n < 0) then
+      AControl := DepFreq10
+    else
+    if (DepFreq11.Text = '') or not TryStrToInt(DepFreq11.Text, n) or (n < 0) then
+      AControl := DepFreq11;
+    if AControl <> nil then
+    begin
+      AMsg := 'Invalid input.';
+      exit;
+    end;
+  end;
+  Result := true;
+end;
+
+
+initialization
+  {$I twopropunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/comparisons/withinanovaunit.lfm

@@ -0,0 +1,242 @@
+object WithinANOVAFrm: TWithinANOVAFrm
+  Left = 544
+  Height = 362
+  Top = 330
+  Width = 458
+  AutoSize = True
+  Caption = 'Within Subjects ANOVA and Hoyt Reliability Estimates'
+  ClientHeight = 362
+  ClientWidth = 458
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 15
+    Top = 8
+    Width = 97
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Available Variables'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = SelList
+    AnchorSideTop.Control = Owner
+    Left = 251
+    Height = 15
+    Top = 8
+    Width = 96
+    BorderSpacing.Top = 8
+    Caption = 'Selected Variables:'
+    ParentColor = False
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = InBtn
+    AnchorSideBottom.Control = GroupBox1
+    Left = 8
+    Height = 229
+    Top = 25
+    Width = 199
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Constraints.MinHeight = 220
+    ItemHeight = 0
+    MultiSelect = True
+    OnSelectionChange = VarListSelectionChange
+    TabOrder = 0
+  end
+  object InBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = VarList
+    Left = 215
+    Height = 28
+    Top = 25
+    Width = 28
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = InBtnClick
+    Spacing = 0
+    TabOrder = 1
+  end
+  object OutBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = InBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 215
+    Height = 28
+    Top = 57
+    Width = 28
+    BorderSpacing.Top = 4
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = OutBtnClick
+    Spacing = 0
+    TabOrder = 2
+  end
+  object SelList: TListBox
+    AnchorSideLeft.Control = InBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Label2
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = GroupBox1
+    Left = 251
+    Height = 229
+    Top = 25
+    Width = 199
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    ItemHeight = 0
+    MultiSelect = True
+    OnSelectionChange = VarListSelectionChange
+    TabOrder = 3
+  end
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 51
+    Top = 262
+    Width = 384
+    Anchors = [akLeft, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    Caption = 'Options:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.HorizontalSpacing = 20
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 3
+    ClientHeight = 31
+    ClientWidth = 380
+    TabOrder = 4
+    object RelChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 124
+      Caption = 'Reliability Estimates'
+      TabOrder = 0
+    end
+    object AssumpChk: TCheckBox
+      Left = 156
+      Height = 19
+      Top = 6
+      Width = 113
+      Caption = 'Test Assumptions'
+      TabOrder = 1
+    end
+    object PlotChk: TCheckBox
+      Left = 289
+      Height = 19
+      Top = 6
+      Width = 79
+      Caption = 'Plot Means'
+      TabOrder = 2
+    end
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 245
+    Height = 25
+    Top = 329
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 6
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 307
+    Height = 25
+    Top = 329
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 7
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 391
+    Height = 25
+    Top = 329
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 8
+  end
+  object HelpBtn: TButton
+    Tag = 157
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 186
+    Height = 25
+    Top = 329
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 5
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 313
+    Width = 458
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/comparisons/withinanovaunit.pas

@@ -0,0 +1,521 @@
+// Use file "itemdata2.laz" for testing
+
+unit WithinANOVAUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Buttons, ExtCtrls, Math,
+  MainUnit, FunctionsLib, OutputUnit, MatrixLib, Globals, DataProcs,
+  GraphLib, ContextHelpUnit;
+
+type
+
+  { TWithinANOVAFrm }
+
+  TWithinANOVAFrm = class(TForm)
+    AssumpChk: TCheckBox;
+    Bevel1: TBevel;
+    HelpBtn: TButton;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    CloseBtn: TButton;
+    PlotChk: TCheckBox;
+    RelChk: TCheckBox;
+    GroupBox1: TGroupBox;
+    InBtn: TBitBtn;
+    Label2: TLabel;
+    SelList: TListBox;
+    OutBtn: TBitBtn;
+    Label1: TLabel;
+    VarList: TListBox;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure InBtnClick(Sender: TObject);
+    procedure OutBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    procedure UpdateBtnStates;
+  public
+    { public declarations }
+  end; 
+
+var
+  WithinANOVAFrm: TWithinANOVAFrm;
+
+implementation
+
+{ TWithinANOVAFrm }
+
+procedure TWithinANOVAFrm.ResetBtnClick(Sender: TObject);
+VAR
+  i: integer;
+begin
+  VarList.Clear;
+  SelList.Clear;
+  PlotChk.Checked := false;
+  RelChk.Checked := false;
+  AssumpChk.Checked := false;
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  UpdateBtnStates;
+end;
+
+procedure TWithinANOVAFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := True;
+end;
+
+procedure TWithinANOVAFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if GraphFrm = nil then
+    Application.CreateForm(TGraphFrm, GraphFrm);
+end;
+
+procedure TWithinANOVAFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TWithinANOVAFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).tag);
+end;
+
+procedure TWithinANOVAFrm.ComputeBtnClick(Sender: TObject);
+var
+  i, j, k, f3: integer;
+  LabelStr: string;
+  NoSelected, count, row: integer;
+  SSrows, SScols, SSwrows, SSerr, SStot: double;
+  MSrows, MScols, MSwrows, MSerr, MStot: double;
+  dfrows, dfcols, dfwrows, dferr, dftot: double;
+  f1, f2, probf1, GrandMean, Term1, Term2, Term3, Term4: double;
+  r1, r2, r3, r4, X, avgvar, avgcov: double;
+  determ1, determ2, M2, C2, chi2, prob: double;
+  errorfound: boolean;
+  Selected: IntDyneVec;
+  ColLabels: StrDyneVec;
+  ColMeans, ColVar, RowMeans, RowVar, ColStdDev: DblDyneVec;
+  varcovmat, vcmat, workmat: DblDyneMat;
+  title: string;
+  lReport: TStrings;
+begin
+  if SelList.Items.Count = 0 then
+  begin
+     MessageDlg('No variables selected.', mtError, [mbOK], 0);
+     exit;
+  end;
+  if SelList.Items.Count = 1 then
+  begin
+     MessageDlg('At least two variables must be selected.', mtError, [mbOK], 0);
+     exit;
+  end;
+
+  errorfound := false;
+  NoSelected := SelList.Items.Count;
+  Caption := IntToStr(NoSelected);
+
+  SetLength(Selected,NoSelected);
+  SetLength(ColLabels,NoSelected);
+  SetLength(ColMeans,NoSelected);
+  SetLength(ColVar,NoSelected);
+  SetLength(RowMeans,NoCases);
+  SetLength(RowVar,NoCases);
+
+  for i := 0 to NoSelected - 1 do
+  begin
+    LabelStr := SelList.Items[i];
+    for j := 1 to NoVariables do
+      if LabelStr = OS3MainFrm.DataGrid.Cells[j, 0] then
+      begin
+         Selected[i] := j;
+         ColLabels[i] := labelStr;
+         break;
+      end;
+  end;
+
+  // Initialize values
+  SScols := 0.0;
+  SSrows := 0.0;
+  SStot := 0.0;
+  dfwrows := 0.0;
+  dftot := 0.0;
+  GrandMean := 0.0;
+  count := 0;
+
+  for i := 0 to NoSelected-1 do
+  begin
+    ColMeans[i] := 0.0;
+    ColVar[i] := 0.0;
+  end;
+  for j := 0 to NoCases-1 do
+  begin
+    RowMeans[j] := 0.0;
+    RowVar[j] := 0.0;
+  end;
+
+  // Read data and compute sums while reading
+  row := 0;
+  for i := 1 to NoCases do
+  begin
+    if not GoodRecord(i,NoSelected,Selected) then continue;
+    count := count + 1;
+    for j := 1 to NoSelected do
+    begin
+      k := Selected[j-1];
+      X := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[k,i]));
+      RowMeans[row] := RowMeans[row] + X;
+      RowVar[row] := RowVar[row] + (X * X);
+      ColMeans[j-1] := ColMeans[j-1] + X;
+      ColVar[j-1] := ColVar[j-1] + (X * X);
+      GrandMean := GrandMean + X;
+      SStot := SStot + (X * X);
+    end;
+    row := row + 1;
+  end;
+
+  // Calculate ANOVA results
+  Term1 := (GrandMean * GrandMean) / (count * NoSelected);
+  Term2 := SStot;
+  for i := 1 to count do SSrows := SSrows + (RowMeans[i-1] * RowMeans[i-1]);
+  Term4 := SSrows / NoSelected;
+  for i := 1 to NoSelected do SScols := SScols + (ColMeans[i-1] * ColMeans[i-1]);
+  Term3 := SScols / count;
+  SSrows := Term4 - Term1;
+  SScols := Term3 - Term1;
+  SSwrows := Term2 - Term4;
+  SSerr := Term2 - Term3 - Term4 + Term1;
+  SStot := Term2 - Term1;
+  dfrows := count - 1;
+  dfcols := NoSelected - 1;
+  dfwrows := count * (NoSelected - 1);
+  dferr := (count - 1) * (NoSelected - 1);
+  dftot := (count * NoSelected) - 1;
+  MSrows := SSrows / dfrows;
+  MScols := SScols / dfcols;
+  MSwrows := SSwrows / dfwrows;
+  MSerr := SSerr / dferr;
+  MStot := SStot / dftot; // variance of all scores
+  GrandMean := GrandMean / (count * NoSelected);
+  for i := 0 to count-1 do
+  begin
+    RowVar[i] := RowVar[i] - (RowMeans[i] * RowMeans[i] / NoSelected);
+    RowVar[i] := RowVar[i] / (NoSelected - 1);
+    RowMeans[i] := RowMeans[i] / NoSelected;
+  end;
+  for i := 0 to NoSelected-1 do
+  begin
+    ColVar[i] := ColVar[i] - (ColMeans[i] * ColMeans[i] / count);
+    ColVar[i] := ColVar[i] / (count - 1);
+    ColMeans[i] := ColMeans[i] / count;
+  end;
+  f1 := MScols / MSerr; // treatment F statistic
+  probf1 := probf(f1,dfcols,dferr);
+
+  // Do reliability terms if requested
+  if RelChk.Checked then
+  begin
+    r1 := 1.0 - (MSwrows / MSrows); // unadjusted reliability of test
+    r2 := (MSrows - MSwrows) / (MSrows + (NoSelected - 1) * MSwrows);
+    // r2 is unadjusted reliability of a single item
+    r3 := (MSrows - MSerr) / MSrows; // Cronbach alpha for test
+    r4 := (MSrows - MSerr) / (MSrows + (NoSelected - 1) * MSerr);
+    // r4 is adjusted reliability of a single item
+  end;
+
+  // do homogeneity of variance and covariance checks if requested
+
+  lReport := TStringList.Create;
+  try
+    // print results
+    lReport.Add('Treatments by Subjects (AxS) ANOVA Results.');
+    lReport.Add('');
+    lReport.Add('Data File = ' + OS3MainFrm.FileNameEdit.Text);
+    lReport.Add('');
+    lReport.Add('');
+    lReport.Add('-----------------------------------------------------------');
+    lReport.Add('SOURCE           DF        SS        MS        F  Prob. > F');
+    lReport.Add('-----------------------------------------------------------');
+    lReport.Add('SUBJECTS       %4.0f%10.3f%10.3f', [dfrows, SSrows, MSrows]);
+    lReport.Add('WITHIN SUBJECTS%4.0f%10.3f%10.3f', [dfwrows, SSwrows, MSwrows]);
+    lReport.Add('   TREATMENTS  %4.0f%10.3f%10.3f%10.3f%10.3f', [dfcols, SScols, MScols, f1, probf1]);
+    lReport.Add('   RESIDUAL    %4.0f%10.3f%10.3f', [dferr, SSerr, MSerr]);
+    lReport.Add('-----------------------------------------------------------');
+    lReport.Add('TOTAL          %4.0f%10.3f%10.3f', [dftot, SStot, MStot]);
+    lReport.Add('-----------------------------------------------------------');
+    lReport.Add('');
+    lReport.Add('');
+    lReport.Add('TREATMENT (COLUMN) MEANS AND STANDARD DEVIATIONS');
+    lReport.Add('VARIABLE  MEAN      STD.DEV.');
+    for i := 1 to NoSelected do
+      lReport.Add('%-8s%10.3f%10.3f', [ColLabels[i-1], ColMeans[i-1], sqrt(ColVar[i-1])]);
+    lReport.Add('');
+    lReport.Add('Mean of all scores = %.3f with standard deviation = %.3f', [GrandMean, sqrt(MStot)]);
+    lReport.Add('');
+    lReport.Add('');
+
+    // Do reliability estimates if requested
+    if RelChk.Checked then
+    begin
+      lReport.Add('RELIABILITY ESTIMATES');
+      lReport.Add('');
+      lReport.Add('TYPE OF ESTIMATE              VALUE');
+      lReport.Add('Unadjusted total reliability %7.3f', [r1]);
+      lReport.Add('Unadjusted item reliability  %7.3f', [r2]);
+      lReport.Add('Adjusted total (Cronbach)    %7.3f', [r3]);
+      lReport.Add('Adjusted item reliability    %7.3f', [r4]);
+      lReport.Add('');
+      lReport.Add('');
+    end;
+
+    // Test assumptions of variance - covariance homogeneity if requested
+    if AssumpChk.Checked then
+    begin
+      SetLength(varcovmat,NoSelected+1,NoSelected+1);
+      SetLength(vcmat,NoSelected+1,NoSelected+1);
+      SetLength(workmat,NoSelected+1,NoSelected+1);
+      SetLength(ColStdDev,NoSelected);
+      errorfound := false;
+      count := NoCases;
+      lReport.Add('BOX TEST FOR HOMOGENEITY OF VARIANCE-COVARIANCE MATRIX');
+      lReport.Add('');
+      GridCovar(NoSelected, Selected, varcovmat, ColMeans, ColVar, ColStdDev, errorfound, count);
+      title := 'SAMPLE COVARIANCE MATRIX';
+      MatPrint(varcovmat, NoSelected, NoSelected, title, ColLabels, ColLabels, NoCases, lReport);
+      if errorfound then
+        MessageDlg('Zero variance found for a variable.', mtError, [mbOK], 0);
+
+      // get average of variances into workmat diagonal and average of
+      // covariances into workmat off-diagonals (See Winer, pg 371)
+      avgvar := 0.0;
+      avgcov := 0.0;
+      for i := 0 to NoSelected-1 do
+        vcmat[i,i] := varcovmat[i,i];
+      for i := 0 to NoSelected-2 do
+      begin
+        for j := i+1 to NoSelected-1 do
+        begin
+          vcmat[i,j] := varcovmat[i,j];
+          vcmat[j,i] := vcmat[i,j];
+        end;
+      end;
+
+      for i := 0 to NoSelected-1 do
+        avgvar := avgvar + varcovmat[i,i];
+      for i := 0 to NoSelected-2 do
+        for j := i+1 to NoSelected-1 do
+          avgcov := avgcov + varcovmat[i,j];
+      avgvar := avgvar / NoSelected;
+      avgcov := avgcov / (NoSelected * NoSelected - 1) / 2.0;
+      for i := 0 to NoSelected-1 do
+        workmat[i,i] := avgvar;
+      for i := 0 to NoSelected-2 do
+      begin
+        for j := i+1 to NoSelected-1 do
+        begin
+          workmat[i,j] := avgcov;
+          workmat[j,i] := workmat[i,j];
+        end;
+      end;
+
+      // get determinants of varcov and workmat
+      determ1 := 0.0;
+      determ2 := 0.0;
+      M2 := 0.0;
+      C2 := 0.0;
+      chi2 := 0.0;
+      f2 := 0;
+      prob := 0.0;
+      Determ(vcmat,NoSelected,NoSelected,determ1,errorfound);
+      if determ1 < 0.0 then determ1 := 0.0;
+      Determ(workmat,NoSelected,NoSelected,determ2,errorfound);
+      if determ2 < 0.0 then determ2 := 0.0;
+      count := NoCases;
+      GridCovar(NoSelected,Selected,varcovmat,ColMeans,ColVar,ColStdDev,errorfound,count);
+      errorfound := false;
+      if ((determ1 > 0.0) and (determ2 > 0.0)) then
+        M2 := -(NoCases*NoSelected - 1) * ln(determ1 / determ2)
+      else
+      begin
+        M2 := 0.0;
+        errorfound := true;
+        MessageDlg('A determinant <= zero was found.', mtError, [mbOK], 0);
+      end;
+      if not errorfound then
+      begin
+        C2 := NoSelected * (NoSelected+1) * (NoSelected + 1) * (2 * NoSelected - 3);
+        C2  := C2 / (6 * (count - 1)*(NoSelected - 1) * (NoSelected * NoSelected + NoSelected - 4));
+        chi2 := (1.0 - C2) * M2;
+        f3 := (NoSelected * NoSelected + NoSelected - 4) div 2;
+        if ((chi2 > 0.01) and (chi2 < 1000.0)) then
+          prob := chisquaredprob(chi2,f3)
+        else
+        begin
+          if chi2 <= 0.0 then prob := 1.0;
+          if chi2 >= 1000.0 then prob := 0.0;
+        end;
+      end;
+      title := 'ASSUMED POP. COVARIANCE MATRIX';
+      for i := 0 to NoSelected-1 do
+        for j := 0 to NoSelected-1 do
+          varcovmat[i,j] := workmat[i,j];
+      MatPrint(varcovmat, NoSelected, NoSelected, title, ColLabels, ColLabels, NoCases, lReport);
+      lReport.Add('Determinant of variance-covariance matrix = %10.3g', [determ1]);
+      lReport.Add('Determinant of homogeneity matrix = %10.3g', [determ2]);
+      if not errorfound then
+      begin
+        lReport.Add('ChiSquare = %10.3f with %3d degrees of freedom', [chi2,f3]);
+        lReport.Add('Probability of larger chisquare = %6.3g', [1.0-prob]);
+      end;
+    end;
+
+    DisplayReport(lReport);
+
+  finally
+     lReport.Free;
+     ColStdDev := nil;
+     workmat := nil;
+     vcmat := nil;
+     varcovmat := nil;
+  end;
+
+  { Now, plot values if indicated in options list }
+  if PlotChk.Checked then
+  begin
+    SetLength(GraphFrm.Xpoints,1,NoSelected);
+    SetLength(GraphFrm.Ypoints,1,NoSelected);
+
+    // use rowvar to hold variable no.
+    for i := 1 to NoSelected do
+    begin
+      rowvar[i-1] := Selected[i-1];
+      GraphFrm.Xpoints[0,i-1] := Selected[i-1];
+      GraphFrm.Ypoints[0,i-1] := ColMeans[i-1];
+    end;
+    GraphFrm.nosets := 1;
+    GraphFrm.nbars := NoSelected;
+    GraphFrm.Heading := 'WITHIN SUBJECTS ANOVA';
+    GraphFrm.XTitle := 'Repeated Measure Var. No.';
+    GraphFrm.YTitle := 'Mean';
+    GraphFrm.barwideprop := 0.5;
+    GraphFrm.AutoScaled := true;
+    GraphFrm.GraphType := 2; // 3d Vertical Bar Chart
+    GraphFrm.BackColor := clYellow;
+    GraphFrm.WallColor := clBlack;
+    GraphFrm.FloorColor := clLtGray;
+    GraphFrm.ShowBackWall := true;
+    GraphFrm.ShowModal;
+  end;
+
+  // Clean-up
+  RowVar := nil;
+  RowMeans := nil;
+  ColVar := nil;
+  ColMeans := nil;
+  ColLabels := nil;
+  GraphFrm.Xpoints := nil;
+  GraphFrm.Ypoints := nil;
+  Selected := nil;
+end;
+
+procedure TWithinANOVAFrm.InBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while i < VarList.Items.Count do
+  begin
+    if VarList.Selected[i] then
+    begin
+      SelList.Items.Add(VarList.Items[i]);
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TWithinANOVAFrm.OutBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while i < SelList.Items.Count do
+  begin
+    if SelList.Selected[i] then
+    begin
+      VarList.Items.Add(SelList.Items[i]);
+      SelList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  VarList.ItemIndex := -1;
+  SelList.ItemIndex := -1;
+  UpdateBtnStates;
+end;
+
+procedure TWithinANOVAFrm.UpdateBtnStates;
+var
+  i: Integer;
+  lEnabled: Boolean;
+begin
+  lEnabled := false;
+  for i:=0 to VarList.Items.Count-1 do
+    if VarList.Selected[i] then
+    begin
+      lEnabled := true;
+      break;
+    end;
+  InBtn.Enabled := lEnabled;
+
+  lEnabled := false;
+  for i:=0 to SelList.Items.Count-1 do
+    if SelList.Selected[i] then
+    begin
+      lEnabled := true;
+      break;
+    end;
+  OutBtn.Enabled := lEnabled;
+end;
+
+procedure TWithinANOVAFrm.VarListSelectionChange(Sender: TObject;
+  User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+
+initialization
+  {$I withinanovaunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/correlation/autocorunit.lfm

@@ -0,0 +1,708 @@
+object AutoCorrFrm: TAutoCorrFrm
+  Left = 456
+  Height = 459
+  Top = 163
+  Width = 684
+  AutoSize = True
+  Caption = 'Autocorrelation'
+  ClientHeight = 459
+  ClientWidth = 684
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 68
+    Top = 8
+    Width = 137
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'The series is code in:'
+    ClientHeight = 48
+    ClientWidth = 133
+    TabOrder = 0
+    object ColBtn: TRadioButton
+      AnchorSideLeft.Control = GroupBox1
+      AnchorSideTop.Control = GroupBox1
+      Left = 16
+      Height = 19
+      Top = 0
+      Width = 99
+      BorderSpacing.Left = 16
+      Caption = 'A Grid Column'
+      OnClick = ColBtnClick
+      TabOrder = 0
+    end
+    object RowBtn: TRadioButton
+      AnchorSideLeft.Control = ColBtn
+      AnchorSideTop.Control = ColBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 16
+      Height = 19
+      Top = 21
+      Width = 109
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      BorderSpacing.Bottom = 8
+      Caption = 'A row of the grid'
+      OnClick = RowBtnClick
+      TabOrder = 1
+    end
+  end
+  object GroupBox2: TGroupBox
+    AnchorSideLeft.Control = GroupBox1
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Owner
+    Left = 169
+    Height = 68
+    Top = 8
+    Width = 275
+    AutoSize = True
+    BorderSpacing.Left = 24
+    BorderSpacing.Top = 8
+    Caption = 'Include Cases:'
+    ClientHeight = 48
+    ClientWidth = 271
+    TabOrder = 1
+    object Label1: TLabel
+      AnchorSideLeft.Control = FromCaseEdit
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = OnlyCasesBtn
+      AnchorSideTop.Side = asrCenter
+      Left = 189
+      Height = 15
+      Top = 23
+      Width = 12
+      BorderSpacing.Left = 4
+      Caption = 'To'
+      ParentColor = False
+    end
+    object AllCasesBtn: TRadioButton
+      AnchorSideLeft.Control = GroupBox2
+      AnchorSideTop.Control = GroupBox2
+      Left = 12
+      Height = 19
+      Top = 0
+      Width = 67
+      BorderSpacing.Left = 12
+      Caption = 'All Cases'
+      TabOrder = 0
+    end
+    object OnlyCasesBtn: TRadioButton
+      AnchorSideLeft.Control = GroupBox2
+      AnchorSideTop.Control = AllCasesBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 12
+      Height = 19
+      Top = 21
+      Width = 112
+      BorderSpacing.Left = 12
+      BorderSpacing.Top = 2
+      BorderSpacing.Bottom = 8
+      Caption = 'Only Cases From:'
+      TabOrder = 1
+    end
+    object FromCaseEdit: TEdit
+      AnchorSideLeft.Control = OnlyCasesBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = OnlyCasesBtn
+      AnchorSideTop.Side = asrCenter
+      Left = 128
+      Height = 23
+      Top = 19
+      Width = 57
+      Alignment = taRightJustify
+      BorderSpacing.Left = 4
+      TabOrder = 2
+      Text = 'FromCaseEdit'
+    end
+    object ToCaseEdit: TEdit
+      AnchorSideLeft.Control = Label1
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = OnlyCasesBtn
+      AnchorSideTop.Side = asrCenter
+      Left = 205
+      Height = 23
+      Top = 19
+      Width = 58
+      Alignment = taRightJustify
+      BorderSpacing.Left = 4
+      BorderSpacing.Right = 8
+      TabOrder = 3
+      Text = 'ToCaseEdit'
+    end
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = CancelBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 387
+    Height = 25
+    Top = 426
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 5
+  end
+  object CancelBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 453
+    Height = 25
+    Top = 426
+    Width = 62
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Cancel'
+    ModalResult = 2
+    TabOrder = 6
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = ReturnBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 527
+    Height = 25
+    Top = 426
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    ModalResult = 1
+    OnClick = ComputeBtnClick
+    TabOrder = 7
+  end
+  object ReturnBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 615
+    Height = 25
+    Top = 426
+    Width = 61
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Return'
+    ModalResult = 1
+    OnClick = ReturnBtnClick
+    TabOrder = 8
+  end
+  object HelpBtn: TButton
+    Tag = 104
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 324
+    Height = 25
+    Top = 426
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 4
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = ReturnBtn
+    Left = 0
+    Height = 8
+    Top = 410
+    Width = 684
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = GroupBox2
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Panel2
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 326
+    Top = 84
+    Width = 447
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BevelOuter = bvNone
+    ClientHeight = 326
+    ClientWidth = 447
+    TabOrder = 2
+    object Label3: TLabel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Panel1
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 100
+      Caption = 'Available Variables:'
+      ParentColor = False
+    end
+    object Label4: TLabel
+      AnchorSideLeft.Control = DepVarEdit
+      AnchorSideBottom.Control = DepVarEdit
+      Left = 301
+      Height = 15
+      Top = 25
+      Width = 88
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 2
+      Caption = 'Selected Variable'
+      ParentColor = False
+    end
+    object Label5: TLabel
+      AnchorSideTop.Control = AlphaEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = AlphaEdit
+      Left = 311
+      Height = 15
+      Top = 93
+      Width = 67
+      Anchors = [akTop, akRight]
+      BorderSpacing.Right = 8
+      Caption = 'Alpha Level: '
+      ParentColor = False
+    end
+    object Label6: TLabel
+      AnchorSideTop.Control = MaxLagEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = MaxLagEdit
+      Left = 295
+      Height = 15
+      Top = 120
+      Width = 83
+      Anchors = [akTop, akRight]
+      BorderSpacing.Right = 8
+      Caption = 'Maximum Lag: '
+      ParentColor = False
+    end
+    object GroupBox3: TGroupBox
+      AnchorSideLeft.Control = InBtn
+      AnchorSideTop.Control = MaxLagEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 265
+      Height = 51
+      Top = 163
+      Width = 182
+      Anchors = [akTop, akLeft, akRight]
+      AutoSize = True
+      BorderSpacing.Top = 24
+      Caption = 'Projection Option:'
+      ClientHeight = 31
+      ClientWidth = 178
+      TabOrder = 6
+      object Label2: TLabel
+        AnchorSideLeft.Control = ProjPtsEdit
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = ProjPtsEdit
+        AnchorSideTop.Side = asrCenter
+        Left = 135
+        Height = 15
+        Top = 6
+        Width = 33
+        BorderSpacing.Left = 8
+        BorderSpacing.Right = 16
+        BorderSpacing.Bottom = 8
+        Caption = 'Points'
+        ParentColor = False
+      end
+      object ProjectChk: TCheckBox
+        AnchorSideLeft.Control = GroupBox3
+        AnchorSideTop.Control = ProjPtsEdit
+        AnchorSideTop.Side = asrCenter
+        Left = 12
+        Height = 19
+        Top = 4
+        Width = 57
+        BorderSpacing.Left = 12
+        Caption = 'Project'
+        TabOrder = 0
+      end
+      object ProjPtsEdit: TEdit
+        AnchorSideLeft.Control = ProjectChk
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = GroupBox3
+        Left = 85
+        Height = 23
+        Top = 2
+        Width = 42
+        Alignment = taRightJustify
+        BorderSpacing.Left = 16
+        BorderSpacing.Top = 2
+        BorderSpacing.Bottom = 6
+        TabOrder = 1
+      end
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Label3
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = InBtn
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 309
+      Top = 17
+      Width = 257
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      Constraints.MinHeight = 220
+      ItemHeight = 0
+      TabOrder = 0
+    end
+    object InBtn: TBitBtn
+      AnchorSideLeft.Control = Bevel2
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = VarList
+      Left = 265
+      Height = 28
+      Top = 17
+      Width = 28
+      Glyph.Data = {
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+        71FFA0D7A9FF9CD5A5FF98D3A1FF94D09DFF90CE98FF8BCB93FF87C98EFF82C6
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+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
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+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+      }
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = InBtnClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object OutBtn: TBitBtn
+      AnchorSideLeft.Control = InBtn
+      AnchorSideTop.Control = InBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 265
+      Height = 28
+      Top = 49
+      Width = 28
+      BorderSpacing.Top = 4
+      Glyph.Data = {
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+        2000000000000004000064000000640000000000000000000000FFFFFF00FFFF
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+        FF00FFFFFF0053A95CD94DA156F747994F38FFFFFF00FFFFFF00FFFFFF00FFFF
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+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+      }
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = OutBtnClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object DepVarEdit: TEdit
+      AnchorSideLeft.Control = InBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = OutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 301
+      Height = 23
+      Top = 42
+      Width = 146
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      TabOrder = 3
+      Text = 'DepVarEdit'
+    end
+    object AlphaEdit: TEdit
+      AnchorSideTop.Control = DepVarEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 386
+      Height = 23
+      Top = 89
+      Width = 61
+      Alignment = taRightJustify
+      Anchors = [akTop, akRight]
+      BorderSpacing.Top = 24
+      TabOrder = 4
+      Text = 'AlphaEdit'
+    end
+    object MaxLagEdit: TEdit
+      AnchorSideTop.Control = AlphaEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 386
+      Height = 23
+      Top = 116
+      Width = 61
+      Alignment = taRightJustify
+      Anchors = [akTop, akRight]
+      BorderSpacing.Top = 4
+      TabOrder = 5
+      Text = 'MaxLagEdit'
+    end
+    object Bevel2: TBevel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = Panel1
+      Left = 182
+      Height = 12
+      Top = 0
+      Width = 83
+      Shape = bsSpacer
+    end
+  end
+  object Panel2: TPanel
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 463
+    Height = 357
+    Top = 6
+    Width = 213
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    BevelOuter = bvNone
+    ClientHeight = 357
+    ClientWidth = 213
+    TabOrder = 3
+    object GroupBox4: TGroupBox
+      AnchorSideLeft.Control = Panel2
+      AnchorSideTop.Control = GroupBox5
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Side = asrBottom
+      Left = 0
+      Height = 177
+      Top = 180
+      Width = 213
+      AutoSize = True
+      BorderSpacing.Top = 16
+      Caption = 'Data Smoothing:'
+      ChildSizing.LeftRightSpacing = 12
+      ChildSizing.TopBottomSpacing = 6
+      ChildSizing.VerticalSpacing = 2
+      ChildSizing.Layout = cclLeftToRightThenTopToBottom
+      ClientHeight = 157
+      ClientWidth = 209
+      TabOrder = 1
+      object MeanChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 6
+        Width = 185
+        Caption = 'Center on Mean'
+        TabOrder = 0
+      end
+      object DifferenceChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 27
+        Width = 185
+        Caption = 'Difference Smoothing'
+        TabOrder = 1
+      end
+      object MoveAvgChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 48
+        Width = 185
+        Caption = 'Moving Average Smooth'
+        TabOrder = 2
+      end
+      object ExpSmoothChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 69
+        Width = 185
+        Caption = 'Exponentially Smooth'
+        TabOrder = 3
+      end
+      object FourierSmoothChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 90
+        Width = 185
+        Caption = 'Fourier Filter Smooth'
+        TabOrder = 4
+      end
+      object PolyChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 111
+        Width = 185
+        Caption = 'Polynomial Regression Smooth'
+        TabOrder = 5
+      end
+      object MRegSmoothChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 132
+        Width = 185
+        Caption = 'Multiple Regression Smooth'
+        TabOrder = 6
+      end
+    end
+    object GroupBox5: TGroupBox
+      AnchorSideLeft.Control = Panel2
+      AnchorSideTop.Control = Panel2
+      AnchorSideRight.Control = GroupBox4
+      AnchorSideRight.Side = asrBottom
+      Left = 0
+      Height = 156
+      Top = 8
+      Width = 213
+      Anchors = [akTop, akLeft, akRight]
+      AutoSize = True
+      BorderSpacing.Top = 8
+      Caption = 'Analysis / Output Options'
+      ChildSizing.LeftRightSpacing = 12
+      ChildSizing.TopBottomSpacing = 6
+      ChildSizing.VerticalSpacing = 2
+      ChildSizing.Layout = cclLeftToRightThenTopToBottom
+      ClientHeight = 136
+      ClientWidth = 209
+      TabOrder = 0
+      object PlotChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 6
+        Width = 142
+        Caption = 'Correlogram'
+        TabOrder = 0
+      end
+      object StatsChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 27
+        Width = 142
+        Caption = 'Statistics'
+        TabOrder = 1
+      end
+      object RMatChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 48
+        Width = 142
+        Caption = 'Print correlation Mat.'
+        TabOrder = 2
+      end
+      object PartialsChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 69
+        Width = 142
+        Caption = 'Partial autocorrelations'
+        TabOrder = 3
+      end
+      object YuleWalkerChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 90
+        Width = 142
+        Caption = 'Yule-Walker Coef.s'
+        TabOrder = 4
+      end
+      object ResidChk: TCheckBox
+        Left = 12
+        Height = 19
+        Top = 111
+        Width = 142
+        Caption = 'Residual Plot'
+        TabOrder = 5
+      end
+    end
+  end
+end

applications/lazstats/source/forms/analysis/correlation/autoplotunit.lfm

@@ -0,0 +1,67 @@
+object AutoPlotFrm: TAutoPlotFrm
+  Left = 480
+  Height = 517
+  Top = 170
+  Width = 743
+  Caption = 'Autocorrelation and partial autocorrelation'
+  ClientHeight = 517
+  ClientWidth = 743
+  OnActivate = FormActivate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Image1: TImage
+    Left = 0
+    Height = 476
+    Top = 0
+    Width = 743
+    Align = alClient
+  end
+  object Panel1: TPanel
+    Left = 0
+    Height = 41
+    Top = 476
+    Width = 743
+    Align = alBottom
+    AutoSize = True
+    BevelOuter = bvNone
+    ClientHeight = 41
+    ClientWidth = 743
+    TabOrder = 0
+    object PrintBtn: TButton
+      AnchorSideTop.Control = Panel1
+      AnchorSideRight.Control = ReturnBtn
+      Left = 607
+      Height = 25
+      Top = 8
+      Width = 51
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Left = 12
+      BorderSpacing.Top = 8
+      BorderSpacing.Right = 12
+      BorderSpacing.Bottom = 8
+      Caption = 'Print'
+      OnClick = PrintBtnClick
+      TabOrder = 0
+    end
+    object ReturnBtn: TButton
+      AnchorSideTop.Control = Panel1
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 670
+      Height = 25
+      Top = 8
+      Width = 61
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Left = 12
+      BorderSpacing.Top = 8
+      BorderSpacing.Right = 12
+      BorderSpacing.Bottom = 8
+      Caption = 'Return'
+      ModalResult = 1
+      TabOrder = 1
+    end
+  end
+end

applications/lazstats/source/forms/analysis/correlation/autoplotunit.pas

@@ -0,0 +1,231 @@
+unit AutoPlotUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  ExtCtrls, StdCtrls, Printers,
+  Globals;
+
+type
+
+  { TAutoPlotFrm }
+
+  TAutoPlotFrm = class(TForm)
+    Image1: TImage;
+    PrintBtn: TButton;
+    ReturnBtn: TButton;
+    Panel1: TPanel;
+    procedure FormActivate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure PrintBtnClick(Sender: TObject);
+    procedure AutoPlot(Sender: TObject);
+
+  private
+    { private declarations }
+
+  public
+    { public declarations }
+    correlations, partcors : DblDyneVec;
+    uplimit, lowlimit : double;
+    npoints : integer;
+    DepVarEdit : string;
+    PlotPartCors : boolean; // true to plot partial correlations
+    PlotLimits : boolean;   // true to show upper and lower limits
+
+  end; 
+
+var
+  AutoPlotFrm: TAutoPlotFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TAutoPlotFrm }
+
+procedure TAutoPlotFrm.FormShow(Sender: TObject);
+begin
+  Image1.Canvas.Brush.Color := clWhite;
+  Image1.Canvas.FillRect(0, 0, Image1.Width, Image1.Height);
+//    AutoPlotFrm.Image1.Canvas.Clear;
+  AutoPlot(self);
+end;
+
+procedure TAutoPlotFrm.PrintBtnClick(Sender: TObject);
+var r : Trect;
+begin
+        with Printer do
+        begin
+                Printer.Orientation := poPortrait;
+                r := Rect(20,20,printer.pagewidth-20,printer.pageheight div 2 + 20);
+                BeginDoc;
+                Canvas.StretchDraw(r,Image1.Picture.BitMap);
+                EndDoc;
+        end;
+end;
+
+procedure TAutoPlotFrm.AutoPlot(Sender: TObject);
+var
+    topmarg, botmarg, leftmarg, rightmarg, verthi, horizlong : integer;
+    i, X, Y, middle, yincrement, xincrement, labelheight : integer;
+    labelstring : string;
+    labelstr : string;
+    corstep, yprop, scaley : double;
+
+begin
+    height := Image1.Canvas.Height;
+    width := Image1.Canvas.Width;
+    middle := height div 2;
+    topmarg := height div 10;
+    verthi := height - (2 * topmarg);
+    botmarg := topmarg + verthi;
+    leftmarg := width div 10;
+    horizlong := width - 2 * leftmarg;
+    rightmarg := leftmarg + horizlong;
+    yincrement := verthi div 20;
+    xincrement := horizlong div npoints;
+
+//    AutoPlotFrm.Show;
+    Image1.Canvas.Pen.Color := clBlack;
+
+    // print title at top, centered
+    labelstring := 'Autocorrelations analysis for :';
+    labelstring := labelstring + DepVarEdit;
+    X := (leftmarg + horizlong div 2) - (Image1.Canvas.TextWidth(labelstring) div 2);
+    Y := 1;
+    Image1.Canvas.TextOut(X,Y,labelstring);
+
+    // draw middle (zero correlation) axis
+    Y := middle;
+    Image1.Canvas.MoveTo(leftmarg,Y);
+    X := rightmarg;
+    Image1.Canvas.LineTo(X,Y);
+
+    // draw right axis
+    X := leftmarg;
+    Y := botmarg;
+    Image1.Canvas.MoveTo(X,Y);
+    Y := topmarg;
+    Image1.Canvas.LineTo(X,Y);
+
+    // correlation scale to left of vertical axis
+    corstep := 1.0;
+    for i := 0 to 20 do
+    begin
+        Y := topmarg + (i * yincrement);
+        labelstr := format('%4.2f -',[corstep]);
+        labelstring := labelstr;
+        X := leftmarg - Image1.Canvas.TextWidth(labelstring);
+        Image1.Canvas.TextOut(X,Y,labelstring);
+        corstep := corstep - 0.1;
+    end;
+
+    // Make legend axis on bottom
+    X := leftmarg;
+    Y := botmarg;
+    Image1.Canvas.MoveTo(X,Y);
+    X := rightmarg;
+    Image1.Canvas.LineTo(X,Y);
+    for i := 0 to npoints do
+    begin
+        X := leftmarg + (xincrement * i);
+        labelstring := '|';
+        Image1.Canvas.TextOut(X,Y,labelstring);
+        labelstring := IntToStr(i);
+        Y := Y + 5;
+        if (i mod 2) = 1 then Image1.Canvas.TextOut(X,Y,labelstring);
+        Y := botmarg;
+    end;
+    labelstring := 'LAG VALUE';
+    X := (leftmarg + horizlong div 2) - (Image1.Canvas.TextWidth(labelstring) div 2);
+    Y := botmarg + Image1.Canvas.TextHeight(labelstring);
+    Image1.Canvas.TextOut(X,Y,labelstring);
+
+    // Plot lines from correlation to correlation
+    Image1.Canvas.Pen.Color := clRed;
+    for i := 0 to npoints - 1 do
+    begin
+         yprop := (1.0 - correlations[i]) / 2.0;
+         scaley := yprop * verthi;
+         X := leftmarg + round(xincrement * i);
+         Y := topmarg + round(scaley);
+         if (i = 0)then Image1.Canvas.MoveTo(X,Y)
+           else Canvas.LineTo(X,Y);
+         Image1.Canvas.Ellipse(X-3,Y-3,X+3,Y+3);
+    end;
+
+    // Plot partial correlations
+    if PlotPartCors then
+    begin
+         Image1.Canvas.Pen.Color := clBlue;
+         for i := 0 to npoints - 1 do
+         begin
+              yprop := (1.0 - partcors[i]) / 2.0;
+              scaley := yprop * verthi;
+              X := leftmarg + round(xincrement * i);
+              Y := topmarg + round(scaley);
+              if (i = 0) then Image1.Canvas.MoveTo(X,Y)
+              else Image1.Canvas.LineTo(X,Y);
+              Image1.Canvas.Ellipse(X-3,Y-3,X+3,Y+3);
+         end;
+    end;
+
+    // Plot lines for upper and lower 95% confidence levels
+    if PlotLimits then
+    begin
+         Image1.Canvas.Pen.Color := clGreen;
+         yprop := (1.0 - uplimit) / 2.0;
+         scaley := yprop * verthi;
+         Y := topmarg + round(scaley);
+         Image1.Canvas.MoveTo(leftmarg,Y);
+         X := rightmarg;
+         Image1.Canvas.LineTo(X,Y);
+         yprop := (1.0 - lowlimit) / 2.0;
+         scaley := yprop * verthi;
+         Y := topmarg + round(scaley);
+         Image1.Canvas.MoveTo(leftmarg,Y);
+         X := rightmarg;
+         Image1.Canvas.LineTo(X,Y);
+    end;
+
+    // Show legend at right
+    X := rightmarg;
+    labelstring := 'Correlations';
+    labelheight := Image1.Canvas.TextHeight(labelstring);
+    Y := 5 * labelheight;
+    Image1.Canvas.Font.Color := clRed;
+    Image1.Canvas.TextOut(X,Y,labelstring);
+    if PlotPartCors then
+    begin
+         labelstring := 'Partials';
+         Y := 6 * labelheight;
+         Image1.Canvas.Font.Color := clBlue;
+         Image1.Canvas.TextOut(X,Y,labelstring);
+    end;
+    if PlotLimits then
+    begin
+         Y := 7 * labelheight;
+         labelstring := '95% C.I.';
+         Image1.Canvas.Font.Color := clGreen;
+         Image1.Canvas.TextOut(X,Y,labelstring);
+    end;
+end;
+
+procedure TAutoPlotFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  w := MaxValue([PrintBtn.Width, ReturnBtn.Width]);
+  PrintBtn.Constraints.MinWidth := w;
+  ReturnBtn.Constraints.MinWidth := w;
+end;
+
+initialization
+  {$I autoplotunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/correlation/canonunit.lfm

@@ -0,0 +1,484 @@
+object CannonFrm: TCannonFrm
+  Left = 261
+  Height = 379
+  Top = 157
+  Width = 401
+  AutoSize = True
+  Caption = 'Canonical Correlation Analysis'
+  ClientHeight = 379
+  ClientWidth = 401
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 72
+    Top = 258
+    Width = 225
+    Anchors = [akLeft, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    Caption = 'Options'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.HorizontalSpacing = 16
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 2
+    ClientHeight = 52
+    ClientWidth = 221
+    TabOrder = 1
+    object CorsChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 87
+      Caption = 'Correlations'
+      TabOrder = 0
+    end
+    object InvChk: TCheckBox
+      Left = 115
+      Height = 19
+      Top = 6
+      Width = 94
+      Caption = 'Matrix Inverse'
+      TabOrder = 1
+    end
+    object EigenChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 27
+      Width = 87
+      Caption = 'Eigenvectors'
+      TabOrder = 2
+    end
+    object RedundChk: TCheckBox
+      Left = 115
+      Height = 19
+      Top = 27
+      Width = 94
+      Caption = 'Redundancies'
+      TabOrder = 3
+    end
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = CancelBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 104
+    Height = 25
+    Top = 346
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 3
+  end
+  object CancelBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 170
+    Height = 25
+    Top = 346
+    Width = 62
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Cancel'
+    ModalResult = 2
+    TabOrder = 4
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = ReturnBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 244
+    Height = 25
+    Top = 346
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 5
+  end
+  object ReturnBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 332
+    Height = 25
+    Top = 346
+    Width = 61
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Return'
+    ModalResult = 1
+    TabOrder = 6
+  end
+  object HelpBtn: TButton
+    Tag = 111
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 41
+    Height = 25
+    Top = 346
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 2
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = ReturnBtn
+    Left = 0
+    Height = 8
+    Top = 330
+    Width = 401
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = GroupBox1
+    Left = 0
+    Height = 258
+    Top = 0
+    Width = 401
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    AutoSize = True
+    BevelOuter = bvNone
+    ClientHeight = 258
+    ClientWidth = 401
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideTop.Control = Panel1
+      Left = 8
+      Height = 15
+      Top = 8
+      Width = 100
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 8
+      Caption = 'Available Variables:'
+      ParentColor = False
+    end
+    object Label2: TLabel
+      AnchorSideLeft.Control = LeftList
+      Left = 222
+      Height = 15
+      Top = 8
+      Width = 103
+      BorderSpacing.Top = 8
+      Caption = 'Left-Hand Variables'
+      ParentColor = False
+    end
+    object Label3: TLabel
+      AnchorSideLeft.Control = RightList
+      AnchorSideTop.Control = VarList
+      AnchorSideTop.Side = asrCenter
+      Left = 222
+      Height = 15
+      Top = 130
+      Width = 111
+      Caption = 'Right-Hand Variables'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideTop.Control = Label1
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = LeftIn
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 8
+      Height = 225
+      Top = 25
+      Width = 170
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      BorderSpacing.Bottom = 8
+      Constraints.MinHeight = 220
+      ItemHeight = 0
+      MultiSelect = True
+      TabOrder = 0
+    end
+    object LeftIn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = VarList
+      Left = 186
+      Height = 28
+      Top = 25
+      Width = 28
+      Glyph.Data = {
+        36040000424D3604000000000000360000002800000010000000100000000100
+        2000000000000004000064000000640000000000000000000000FFFFFF00FFFF
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+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
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+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+      }
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = LeftInClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object LeftOut: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = LeftIn
+      AnchorSideTop.Side = asrBottom
+      Left = 186
+      Height = 28
+      Top = 57
+      Width = 28
+      BorderSpacing.Top = 4
+      Glyph.Data = {
+        36040000424D3604000000000000360000002800000010000000100000000100
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+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
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+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF0068C7740668C774BBFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
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+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+      }
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = LeftOutClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object RightIn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideBottom.Control = RightOut
+      Left = 186
+      Height = 28
+      Top = 190
+      Width = 28
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 4
+      Glyph.Data = {
+        36040000424D3604000000000000360000002800000010000000100000000100
+        2000000000000004000064000000640000000000000000000000FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
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+        74FFA5DAAEFFA2D8ABFF9ED6A7FF9AD4A3FF96D29FFF93CF9AFF8ECC95FF89CA
+        90FF85C78BFF81C587FF7DC282FF4A9150FF256929C9FFFFFF00FFFFFF0068C7
+        74FF68C774FF65C371FF61BE6DFF5DB868FF58B162FF53A95CFF4DA156FF4799
+        4FFF419149FF5AA362FF559D5CFF2F7835D1FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00419149F73B8842DBFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF0047994FBB41914906FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+      }
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = RightInClick
+      Spacing = 0
+      TabOrder = 4
+    end
+    object RightOut: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideBottom.Control = VarList
+      AnchorSideBottom.Side = asrBottom
+      Left = 186
+      Height = 28
+      Top = 222
+      Width = 28
+      Anchors = [akLeft, akBottom]
+      Glyph.Data = {
+        36040000424D3604000000000000360000002800000010000000100000000100
+        2000000000000004000064000000640000000000000000000000FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF004DA1560647994FB8FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF0053A95CD94DA156F747994F38FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF005DB868CF71BE7BFF7AC183FF5BAA64FF47994FFF419149FF3B8842FF3580
+        3BFF2F7835FF2A702FFF256929FF216324FF1D5E20FFFFFFFF00FFFFFF0065C3
+        71C47BC886FF9CD5A5FF98D3A1FF94D09DFF90CE98FF8BCB93FF87C98EFF82C6
+        89FF7EC384FF7AC180FF76BE7CFF72BD78FF216324FFFFFFFF00FFFFFF0068C7
+        74C97FCC8AFFA2D8ABFF9ED6A7FF9AD4A3FF96D29FFF93CF9AFF8ECC95FF89CA
+        90FF85C78BFF81C587FF7DC282FF78C07EFF256929FFFFFFFF00FFFFFF00FFFF
+        FF0068C774D180CD8BFF7CC987FF5DB868FF58B162FF53A95CFF4DA156FF4799
+        4FFF419149FF3B8842FF35803BFF2F7835FF2A702FFFFFFFFF00FFFFFF00FFFF
+        FF00FFFFFF0068C774DB65C371F7FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF0068C7740668C774BBFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+        FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+      }
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = RightOutClick
+      Spacing = 0
+      TabOrder = 5
+    end
+    object LeftList: TListBox
+      AnchorSideLeft.Control = LeftIn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = Label2
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Label3
+      Left = 222
+      Height = 89
+      Top = 25
+      Width = 171
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      BorderSpacing.Bottom = 16
+      ItemHeight = 0
+      TabOrder = 3
+    end
+    object RightList: TListBox
+      AnchorSideLeft.Control = LeftList
+      AnchorSideTop.Control = Label3
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = LeftList
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = VarList
+      AnchorSideBottom.Side = asrBottom
+      Left = 222
+      Height = 103
+      Top = 147
+      Width = 171
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      ItemHeight = 0
+      TabOrder = 6
+    end
+  end
+end

applications/lazstats/source/forms/analysis/correlation/canonunit.pas

@@ -0,0 +1,621 @@
+unit CanonUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Buttons, ExtCtrls,
+  MainUnit, OutputUnit, FunctionsLib, GraphLib, Globals, MatrixLib,
+  ContextHelpUnit;
+
+type
+
+  { TCannonFrm }
+
+  TCannonFrm = class(TForm)
+    Bevel1: TBevel;
+    HelpBtn: TButton;
+    Panel1: TPanel;
+    ResetBtn: TButton;
+    CancelBtn: TButton;
+    ComputeBtn: TButton;
+    ReturnBtn: TButton;
+    CorsChk: TCheckBox;
+    InvChk: TCheckBox;
+    EigenChk: TCheckBox;
+    RedundChk: TCheckBox;
+    GroupBox1: TGroupBox;
+    LeftIn: TBitBtn;
+    LeftOut: TBitBtn;
+    RightIn: TBitBtn;
+    RightOut: TBitBtn;
+    Label1: TLabel;
+    Label2: TLabel;
+    Label3: TLabel;
+    LeftList: TListBox;
+    RightList: TListBox;
+    VarList: TListBox;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure LeftInClick(Sender: TObject);
+    procedure LeftOutClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure RightInClick(Sender: TObject);
+    procedure RightOutClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+  public
+    { public declarations }
+  end; 
+
+var
+  CannonFrm: TCannonFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TCannonFrm }
+
+procedure TCannonFrm.ResetBtnClick(Sender: TObject);
+VAR i : integer;
+begin
+     VarList.Clear;
+     LeftList.Clear;
+     RightList.Clear;
+     LeftOut.Enabled := false;
+     LeftIn.Enabled := true;
+     RightOut.Enabled := false;
+     RightIn.Enabled := true;
+     for i := 1 to NoVariables do
+         VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+end;
+
+procedure TCannonFrm.RightInClick(Sender: TObject);
+VAR i, index : integer;
+begin
+     index := VarList.Items.Count;
+     i := 0;
+     while i < index do
+     begin
+         if (VarList.Selected[i]) then
+         begin
+            RightList.Items.Add(VarList.Items.Strings[i]);
+            VarList.Items.Delete(i);
+            index := index - 1;
+            i := 0;
+         end
+         else i := i + 1;
+     end;
+     RightOut.Enabled := true;
+end;
+
+procedure TCannonFrm.RightOutClick(Sender: TObject);
+VAR index : integer;
+begin
+     index := RightList.ItemIndex;
+     if index < 0 then
+     begin
+          RightOut.Enabled := false;
+          exit;
+     end;
+     VarList.Items.Add(RightList.Items.Strings[index]);
+     RightList.Items.Delete(index);
+end;
+
+procedure TCannonFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, CancelBtn.Width, ComputeBtn.Width, ReturnBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  CancelBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  ReturnBtn.Constraints.MinWidth := w;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TCannonFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if OutputFrm = nil then Application.CreateForm(TOutputFrm, OutputFrm);
+end;
+
+procedure TCannonFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TCannonFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).tag);
+end;
+
+procedure TCannonFrm.ComputeBtnClick(Sender: TObject);
+label cleanup;
+var
+   i, j, k, count, a_size, b_size, no_factors, novars, IER: integer;
+   outline, cellstring, gridstring: string;
+   s, m, n, df1, df2, q, w, pcnt_extracted, trace : double;
+   minroot, critical_prob, Lambda, Pillia : double;
+   chisqr, HLTrace, chiprob, ftestprob, Roys, f, Hroot : double;
+   raa, rbb, rab, rba, bigmat, prod, first_prod, second_prod : DblDyneMat;
+   char_equation, raainv, rbbinv, eigenvectors, norm_a, norm_b : DblDyneMat;
+   raw_a, raw_b, a_cors, b_cors, eigentrans, theta, tempmat : DblDyneMat;
+   mean, variance, stddev, roots, root_chi, chi_prob, pv_a, pv_b : DblDyneVec;
+   rd_a, rd_b, pcnt_trace : DblDyneVec;
+   root_df, a_vars, b_vars : IntDyneVec;
+   selected : IntDyneVec;
+   RowLabels, ColLabels : StrDyneVec;
+   CanLabels : StrDyneVec;
+   NCases : integer;
+   title : string;
+   errorcode : boolean = false;
+
+begin
+     k := 0;
+     no_factors := 0;
+     pcnt_extracted := 0.0;
+     trace := 0.0;
+     minroot := 0.0;
+     critical_prob := 0.0;
+     Pillia := 0.0;
+     chisqr := 0.0;
+     HLTrace := 0.0;
+     chiprob := 0.0;
+
+    // Get size of the Left and Right matrices (predictors and dependents)
+    a_size := LeftList.Items.Count;
+    b_size := RightList.Items.Count;
+    novars := a_size + b_size;
+
+    // allocate memory for matrices and vectors
+    SetLength(raa,a_size,a_size);
+    SetLength(rbb,b_size,b_size);
+    SetLength(rab,a_size,b_size);
+    SetLength(rba,b_size,a_size);
+    SetLength(bigmat,novars+1,novars+1);
+    SetLength(prod,novars,novars);
+    SetLength(first_prod,novars,novars);
+    SetLength(second_prod,novars,novars);
+    SetLength(char_equation,novars,novars);
+    SetLength(raainv,a_size,a_size);
+    SetLength(rbbinv,b_size,b_size);
+    SetLength(eigenvectors,novars,novars);
+    SetLength(norm_a,novars,novars);
+    SetLength(norm_b,novars,novars);
+    SetLength(raw_a,novars,novars);
+    SetLength(raw_b,novars,novars);
+    SetLength(a_cors,novars,novars);
+    SetLength(b_cors,novars,novars);
+    SetLength(eigentrans,novars,novars);
+    SetLength(theta,novars,novars);
+    SetLength(tempmat,novars,novars);
+
+    SetLength(mean,novars);
+    SetLength(variance,novars);
+    SetLength(stddev,novars);
+    SetLength(roots,novars);
+    SetLength(root_chi,novars);
+    SetLength(chi_prob,novars);
+    SetLength(pv_a,novars);
+    SetLength(pv_b,novars);
+    SetLength(rd_a,novars);
+    SetLength(rd_b,novars);
+    SetLength(pcnt_trace,novars);
+
+    SetLength(root_df,novars);
+    SetLength(a_vars,a_size);
+    SetLength(b_vars,b_size);
+    SetLength(CanLabels,novars);
+    SetLength(RowLabels,novars);
+    SetLength(ColLabels,novars);
+    SetLength(Selected,novars);
+
+     //------------ WORK STARTS HERE! -------------------------------------
+
+     // Build labels for canonical functions 1 to novars
+     for i := 1 to b_size do
+         CanLabels[i-1]:='Var. ' + IntToStr(i);
+
+     // identify variables selected for left and right variables
+     for i := 0 to a_size - 1 do // identify left variables
+     begin
+         cellstring := LeftList.Items.Strings[i];
+         for j := 1 to NoVariables do
+         begin
+             gridstring := OS3MainFrm.DataGrid.Cells[j,0];
+             if (cellstring = gridstring) then
+             begin
+                 a_vars[i] := j;
+                 RowLabels[i] := gridstring;
+             end;
+         end;
+     end;
+     for i := 0 to b_size - 1 do // identify left variables
+     begin
+         cellstring := RightList.Items.Strings[i];
+         for j := 1 to NoVariables do
+         begin
+             gridstring := OS3MainFrm.DataGrid.Cells[j,0];
+             if (cellstring = gridstring) then
+             begin
+                 b_vars[i] := j;
+                 ColLabels[i] := gridstring;
+             end;
+         end;
+     end;
+
+     // build list of all variables selected
+     for i := 1 to a_size do selected[i-1] := a_vars[i-1];
+     for i := 1 to b_size do selected[i-1 + a_size] := b_vars[i-1];
+
+     OutputFrm.RichEdit.Clear;
+     OutputFrm.RichEdit.Lines.Add('CANONICAL CORRELATION ANALYSIS');
+     OutputFrm.RichEdit.Lines.Add('');
+     // Get means, standard deviations, etc. for total matrix
+     Correlations(novars,selected,bigmat,mean,variance,stddev,errorcode,Ncases);
+     count := Ncases;
+     if (IER = 1)then
+     begin
+          ShowMessage('Zero variance found for a variable-terminating');
+          goto cleanup;
+     end;
+
+     //partition matrix into quadrants
+     for i := 1 to a_size do
+         for j := 1 to a_size do raa[i-1,j-1]:= bigmat[i-1,j-1];
+
+     for i := a_size + 1 to novars do
+         for j := a_size + 1 to novars do
+              rbb[i-1-a_size,j-1-a_size] := bigmat[i-1,j-1];
+
+     for i := 1 to a_size do
+         for j := a_size + 1 to novars do
+             rab[i-1,j-1-a_size] := bigmat[i-1,j-1];
+
+     for i := a_size + 1 to novars do
+         for j := 1 to a_size do
+             rba[i-1-a_size,j-1] := bigmat[i-1,j-1];
+
+     if CorsChk.Checked then
+     begin
+          title := 'Left Correlation Matrix';
+          MAT_PRINT(raa,a_size,a_size,title,RowLabels,RowLabels,NCases);
+          title := 'Right Correlation Matrix';
+          MAT_PRINT(rbb,b_size,b_size,title,ColLabels,ColLabels,NCases);
+          title := 'Left-Right Correlation Matrix';
+          MAT_PRINT(rab,a_size,b_size,title,RowLabels,ColLabels,NCases);
+          OutputFrm.ShowModal;
+          OutputFrm.RichEdit.Clear;
+     end;
+
+     // get inverses of left and right hand matrices raa and rbb
+     for i := 1 to a_size do
+         for j := 1 to a_size do
+             raainv[i-1,j-1] := raa[i-1,j-1];
+     SVDinverse(raainv,a_size);
+     if InvChk.Checked then
+     begin
+          title := 'Inverse of Left Matrix';
+          MAT_PRINT(raainv,a_size,a_size,title,RowLabels,RowLabels,NCases);
+     end;
+
+     for i := 1 to b_size do
+         for j := 1 to b_size do
+             rbbinv[i-1,j-1] := rbb[i-1,j-1];
+     SVDinverse(rbbinv,b_size);
+     if InvChk.Checked then
+     begin
+          title := 'Inverse of Right Matrix';
+          MAT_PRINT(rbbinv,b_size,b_size,title,ColLabels,ColLabels,NCases);
+     end;
+
+     // get products of raainv x rab and the rbbinv x rba matrix
+     MatAxB(first_prod,rbbinv,rba,b_size,b_size,b_size,a_size,errorcode);
+     MatAxB(second_prod,raainv,rab,a_size,a_size,a_size,b_size,errorcode);
+     title := 'Right Inverse x Right-Left Matrix';
+     MAT_PRINT(first_prod,b_size,a_size,title,ColLabels,RowLabels,NCases);
+     title := 'Left Inverse x Left-Right Matrix';
+     MAT_PRINT(second_prod,a_size,b_size,title,RowLabels,ColLabels,NCases);
+
+     //get characteristic equations matrix (product of last two product matrices
+     //The product should yeild rows and cols representing the smaller of the two sets
+     MatAxB(char_equation,first_prod,second_prod,b_size,a_size, a_size,b_size,errorcode);
+     title := 'Canonical Function';
+     MAT_PRINT(char_equation,b_size,b_size,title,CanLabels,CanLabels,NCases);
+     OutputFrm.ShowModal;
+     OutputFrm.RichEdit.Clear;
+
+     //  now get roots and vectors of the characteristic equation using
+     // NonSymRoots routine
+     minroot := 0.0;
+     for i := 1 to b_size do
+     begin
+         roots[i-1] := 0.0;
+         pcnt_trace[i-1] := 0.0;
+         for j := 1 to b_size do eigenvectors[i-1,j-1] := 0.0;
+     end;
+     trace := 0.0;
+     no_factors := b_size;
+     nonsymroots(char_equation, b_size, no_factors, minroot, eigenvectors, roots,
+                pcnt_trace, trace, pcnt_extracted);
+     outline := format('Trace of the matrix:=%10.4f',[trace]);
+     OutputFrm.RichEdit.Lines.Add(outline);
+     outline := format('Percent of trace extracted: %10.4f',[pcnt_extracted]);
+     OutputFrm.RichEdit.Lines.Add(outline);
+
+     // Normalize smaller set weights and coumpute larger set weights
+     MATTRN(eigentrans,eigenvectors,b_size,b_size);
+     MatAxB(tempmat,eigentrans,rbb,b_size,b_size,b_size,b_size,errorcode);
+     MatAxB(theta,tempmat,eigenvectors,b_size,b_size,b_size,b_size,errorcode);
+     for j := 1 to b_size do
+     begin
+            q := 1.0 / sqrt(theta[j-1,j-1]);
+            for i := 1 to b_size do
+            begin
+                norm_b[i-1,j-1] := eigenvectors[i-1,j-1] * q;
+                raw_b[i-1,j-1] := norm_b[i-1,j-1] / stddev[a_size+i-1];
+            end;
+     end;
+     MatAxB(norm_a,second_prod,norm_b,a_size,b_size,b_size,b_size,errorcode);
+     for j := 1 to b_size do
+     begin
+            for i := 1 to a_size do
+            begin
+                norm_a[i-1,j-1] := norm_a[i-1,j-1] * (1.0 / sqrt(roots[j-1]));
+                raw_a[i-1,j-1] := norm_a[i-1,j-1] / stddev[i-1];
+            end;
+     end;
+
+     // Compute the correlations between variables and canonical variables
+     MatAxB(a_cors,raa,norm_a,a_size,a_size,a_size,b_size,errorcode);
+     for j := 1 to b_size do
+     begin
+         q := 0.0;
+         for i := 1 to a_size do q := q + norm_a[i-1,j-1] * a_cors[i-1,j-1];
+         q := 1.0 / sqrt(q);
+         for i := 1 to a_size do a_cors[i-1,j-1] := a_cors[i-1,j-1] * q;
+     end;
+     MatAxB(b_cors,rbb,norm_b,b_size,b_size,b_size,b_size,errorcode);
+     for j := 1 to b_size do
+     begin
+         q := 0.0;
+         for i := 1 to b_size do q := q + norm_b[i-1,j-1] * b_cors[i-1,j-1];
+         q := 1.0 / sqrt(q);
+         for i := 1 to b_size do b_cors[i-1,j-1] := b_cors[i-1,j-1] * q;
+     end;
+
+     // Compute the Proportions of Variance (PVs) and Redundancy Coefficients
+     for j := 1 to b_size do
+     begin
+         pv_a[j-1] := 0.0;
+         for i := 1 to a_size do pv_a[j-1] := pv_a[j-1] + (a_cors[i-1,j-1] * a_cors[i-1,j-1]);
+         pv_a[j-1] := pv_a[j-1] / a_size;
+         rd_a[j-1] := pv_a[j-1] * roots[j-1];
+     end;
+     for j := 1 to b_size do
+     begin
+         pv_b[j-1] := 0.0;
+         for i := 1 to b_size do pv_b[j-1] := pv_b[j-1] + (b_cors[i-1,j-1] * b_cors[i-1,j-1]);
+         pv_b[j-1] := pv_b[j-1] / b_size;
+         rd_b[j-1] := pv_b[j-1] * roots[j-1];
+     end;
+
+     // Compute tests of the roots
+     q := a_size + b_size + 1;
+     q := -(count - 1.0 - (q / 2.0));
+     k := 0;
+     for i := 1 to b_size do
+     begin
+         w := 1.0;
+         for j := i to b_size do w := w * (1.0 - roots[j-1]);
+         root_chi[i-1] := q * ln(w);
+         root_df[i-1] := (a_size - i + 1) * (b_size - i + 1);
+         chi_prob[i-1] := 1.0 - chisquaredprob(root_chi[i-1],root_df[i-1]);
+         if (chi_prob[i-1] < critical_prob) then k := k + 1;
+     end;
+     Roys := roots[0] / (1.0 - roots[0]);
+     Lambda := 1.0;
+     for i := 1 to b_size do
+     begin
+         Hroot := roots[i-1] / (1.0 - roots[i-1]);
+         Lambda := Lambda * (1.0 / (1.0 + Hroot));
+         Pillia := Pillia + (Hroot / (1.0 + Hroot));
+         HLTrace := HLTrace + Hroot;
+     end;
+
+     // Print remaining results
+     OutputFrm.RichEdit.Lines.Add('');
+     OutputFrm.RichEdit.Lines.Add('');
+     outline := '   Canonical R   Root  % Trace   Chi-Sqr    D.F.    Prob.';
+     OutputFrm.RichEdit.Lines.Add(outline);
+     for i := 1 to b_size do
+     begin
+         outline := format('%2d %10.6f %8.3f %7.3f %8.3f      %2d %8.3f',
+          [i, sqrt(roots[i-1]), roots[i-1], pcnt_trace[i-1], root_chi[i-1], root_df[i-1], chi_prob[i-1]]);
+         OutputFrm.RichEdit.Lines.Add(outline);
+     end;
+     chisqr := -ln(Lambda) * (count - 1.0 - 0.5 * (a_size + b_size - 1.0));
+     chiprob := 1.0 - chisquaredprob(chisqr,a_size * b_size);
+     OutputFrm.RichEdit.Lines.Add('');
+     OutputFrm.RichEdit.Lines.Add('Overall Tests of Significance:');
+     OutputFrm.RichEdit.Lines.Add('         Statistic      Approx. Stat.   Value   D.F.  Prob.>Value');
+     outline := format('Wilk''s Lambda           Chi-Squared %10.4f  %3d   %6.4f',
+                [chisqr,a_size * b_size,chiprob]);
+     OutputFrm.RichEdit.Lines.Add(outline);
+     s := b_size;
+     m := 0.5 * (a_size - b_size - 1);
+     n := 0.5 * (count - b_size - a_size - 2);
+     f := (HLTrace * 2.0 * (s * n + 1)) / (s * s * (2.0 * m + s + 1.0));
+     df1 := s * (2.0 * m + s + 1.0);
+     df2 := 2.0 * ( s * n  + 1.0);
+     ftestprob := probf(f,df1,df2);
+     outline := format('Hotelling-Lawley Trace  F-Test      %10.4f %2.0f %2.0f  %6.4f',
+                [f, df1,df2, ftestprob]);
+     OutputFrm.RichEdit.Lines.Add(outline);
+     df2 := s * (2.0 * n + s + 1.0);
+     f := (Pillia / (s - Pillia)) * ( (2.0 * n + s +1.0) / (2.0 * m + s + 1.0) );
+     ftestprob := probf(f,df1,df2);
+     outline := format('Pillai Trace            F-Test      %10.4f %2.0f %2.0f  %6.4f',
+                [f, df1,df2, ftestprob]);
+     OutputFrm.RichEdit.Lines.Add(outline);
+     Roys := Roys * (count - 1 - a_size + b_size)/ a_size ;
+     df1 := a_size;
+     df2 := count - 1 - a_size + b_size;
+     ftestprob := probf(Roys,df1,df2);
+     outline := format('Roys Largest Root       F-Test      %10.4f %2.0f %2.0f  %6.4f',
+                [Roys, df1, df2, ftestprob]);
+     OutputFrm.RichEdit.Lines.Add(outline);
+     OutputFrm.ShowModal;
+     OutputFrm.RichEdit.Clear;
+
+     if EigenChk.Checked then
+     begin
+          title := 'Eigenvectors';
+          MAT_PRINT(eigenvectors,b_size,b_size,title,CanLabels,CanLabels,NCases);
+          OutputFrm.ShowModal();
+          OutputFrm.RichEdit.Clear;
+     end;
+
+     title := 'Standardized Right Side Weights';
+     MAT_PRINT(norm_a,a_size,b_size,title,RowLabels,CanLabels,NCases);
+     title := 'Standardized Left Side Weights';
+     MAT_PRINT(norm_b,b_size,b_size,title,ColLabels,CanLabels,NCases);
+     OutputFrm.ShowModal;
+     OutputFrm.RichEdit.Clear;
+     title := 'Raw Right Side Weights';
+     MAT_PRINT(raw_a,a_size,b_size,title,RowLabels,CanLabels,NCases);
+     title := 'Raw Left Side Weights';
+     MAT_PRINT(raw_b,b_size,b_size,title,ColLabels,CanLabels,NCases);
+     OutputFrm.ShowModal;
+     OutputFrm.RichEdit.Clear;
+     title := 'Right Side Correlations with Function';
+     MAT_PRINT(a_cors,a_size,b_size,title,RowLabels,CanLabels,NCases);
+     title := 'Left Side Correlations with Function';
+     MAT_PRINT(b_cors,b_size,b_size,title,ColLabels,CanLabels,NCases);
+     OutputFrm.ShowModal;
+     OutputFrm.RichEdit.Clear;
+
+     if RedundChk.Checked then
+     begin
+          outline := 'Redundancy Analysis for Right Side Variables';
+          OutputFrm.RichEdit.Lines.Add(outline);
+          OutputFrm.RichEdit.Lines.Add('');
+          outline := '            Variance Prop.    Redundancy';
+          OutputFrm.RichEdit.Lines.Add(outline);
+          for i := 1 to b_size do
+          begin
+               outline := format('%10d %10.5f     %10.5f',[i,pv_a[i-1],rd_a[i-1]]);
+               OutputFrm.RichEdit.Lines.Add(outline);
+          end;
+          OutputFrm.RichEdit.Lines.Add('');
+          outline := 'Redundancy Analysis for Left Side Variables';
+          OutputFrm.RichEdit.Lines.Add(outline);
+          outline := '            Variance Prop.    Redundancy';
+          OutputFrm.RichEdit.Lines.Add(outline);
+          for i := 1 to b_size do
+          begin
+               outline := format('%10d %10.5f     %10.5f',[i,pv_b[i-1],rd_b[i-1]]);
+               OutputFrm.RichEdit.Lines.Add(outline);
+               end;
+          OutputFrm.ShowModal;
+          OutputFrm.RichEdit.Clear;
+     end;
+
+     //------------- Now, clean up memory mess ----------------------------
+cleanup:
+    Selected := nil;
+    ColLabels := nil;
+    RowLabels := nil;
+    CanLabels := nil;
+    b_vars := nil;
+    a_vars := nil;
+    root_df := nil;
+    pcnt_trace := nil;
+    rd_b := nil;
+    rd_a := nil;
+    pv_b := nil;
+    pv_a := nil;
+    chi_prob := nil;
+    root_chi := nil;
+    roots := nil;
+    stddev := nil;
+    variance := nil;
+    mean := nil;
+    tempmat := nil;
+    theta := nil;
+    eigentrans := nil;
+    b_cors := nil;
+    a_cors := nil;
+    raw_b := nil;
+    raw_a := nil;
+    norm_b := nil;
+    norm_a := nil;
+    eigenvectors := nil;
+    rbbinv := nil;
+    raainv := nil;
+    char_equation := nil;
+    second_prod := nil;
+    first_prod := nil;
+    prod := nil;
+    rba := nil;
+    rab := nil;
+    rbb := nil;
+    raa := nil;
+end;
+
+procedure TCannonFrm.LeftInClick(Sender: TObject);
+VAR i, index : integer;
+begin
+     index := VarList.Items.Count;
+     i := 0;
+     while i < index do
+     begin
+         if (VarList.Selected[i]) then
+         begin
+            LeftList.Items.Add(VarList.Items.Strings[i]);
+            VarList.Items.Delete(i);
+            index := index - 1;
+            i := 0;
+         end
+         else i := i + 1;
+     end;
+     LeftOut.Enabled := true;
+end;
+
+procedure TCannonFrm.LeftOutClick(Sender: TObject);
+VAR index : integer;
+begin
+     index := LeftList.ItemIndex;
+     if index < 0 then
+     begin
+          LeftOut.Enabled := false;
+          exit;
+     end;
+     VarList.Items.Add(LeftList.Items.Strings[index]);
+     LeftList.Items.Delete(index);
+end;
+
+initialization
+  {$I canonunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/correlation/differenceunit.lfm

@@ -0,0 +1,153 @@
+object DifferenceFrm: TDifferenceFrm
+  Left = 611
+  Height = 115
+  Top = 292
+  Width = 318
+  AutoSize = True
+  BorderStyle = bsDialog
+  Caption = 'Differencing Specification'
+  ClientHeight = 115
+  ClientWidth = 318
+  OnActivate = FormActivate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object CancelBtn: TButton
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    Left = 128
+    Height = 25
+    Top = 78
+    Width = 62
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Cancel'
+    ModalResult = 2
+    TabOrder = 2
+  end
+  object OKBtn: TButton
+    AnchorSideLeft.Control = CancelBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    Left = 202
+    Height = 25
+    Top = 78
+    Width = 42
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 16
+    BorderSpacing.Bottom = 8
+    Caption = 'OK'
+    ModalResult = 1
+    TabOrder = 3
+  end
+  object HelpBtn: TButton
+    Tag = 121
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = CancelBtn
+    Left = 65
+    Height = 25
+    Top = 78
+    Width = 51
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Left = 16
+    BorderSpacing.Top = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 1
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Owner
+    Left = 68
+    Height = 50
+    Top = 8
+    Width = 183
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BevelOuter = bvNone
+    ClientHeight = 50
+    ClientWidth = 183
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideTop.Control = LagEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = LagEdit
+      Left = 13
+      Height = 15
+      Top = 4
+      Width = 108
+      Anchors = [akTop, akRight]
+      BorderSpacing.Right = 8
+      Caption = 'Difference for lag of:'
+      ParentColor = False
+    end
+    object Label2: TLabel
+      AnchorSideTop.Control = OrderEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = OrderEdit
+      Left = 0
+      Height = 15
+      Top = 31
+      Width = 121
+      Anchors = [akTop, akRight]
+      BorderSpacing.Right = 8
+      Caption = 'No. of times to repeat: '
+      ParentColor = False
+    end
+    object LagEdit: TEdit
+      AnchorSideTop.Control = Panel1
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 129
+      Height = 23
+      Top = 0
+      Width = 54
+      Alignment = taRightJustify
+      Anchors = [akTop, akRight]
+      TabOrder = 0
+      Text = '1'
+    end
+    object OrderEdit: TEdit
+      AnchorSideTop.Control = LagEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 129
+      Height = 23
+      Top = 27
+      Width = 54
+      Alignment = taRightJustify
+      Anchors = [akTop, akRight]
+      BorderSpacing.Top = 4
+      TabOrder = 1
+      Text = '1'
+    end
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Panel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 0
+    Height = 8
+    Top = 62
+    Width = 318
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Top = 4
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/correlation/differenceunit.pas

@@ -0,0 +1,71 @@
+unit DifferenceUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls, contexthelpunit;
+
+type
+
+  { TDifferenceFrm }
+
+  TDifferenceFrm = class(TForm)
+    Bevel1: TBevel;
+    CancelBtn: TButton;
+    HelpBtn: TButton;
+    OKBtn: TButton;
+    LagEdit: TEdit;
+    OrderEdit: TEdit;
+    Label1: TLabel;
+    Label2: TLabel;
+    Panel1: TPanel;
+    procedure FormActivate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+  private
+    { private declarations }
+  public
+    { public declarations }
+  end; 
+
+var
+  DifferenceFrm: TDifferenceFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TDifferenceFrm }
+
+procedure TDifferenceFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  w := MaxValue([HelpBtn.Width, CancelBtn.Width, OKBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  CancelBtn.Constraints.MinWidth := w;
+  OKBtn.Constraints.MinWidth := w;
+end;
+
+procedure TDifferenceFrm.FormShow(Sender: TObject);
+begin
+    LagEdit.Text := '1';
+    OrderEdit.Text := '1';
+end;
+
+procedure TDifferenceFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).tag);
+end;
+
+initialization
+  {$I differenceunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/correlation/expsmoothunit.lfm

@@ -0,0 +1,137 @@
+object ExpSmoothFrm: TExpSmoothFrm
+  Left = 659
+  Height = 131
+  Top = 369
+  Width = 352
+  AutoSize = True
+  BorderStyle = bsDialog
+  Caption = 'Exponential Smoothing Form'
+  ClientHeight = 131
+  ClientWidth = 352
+  OnActivate = FormActivate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideTop.Control = AlphaEdit
+    AnchorSideTop.Side = asrCenter
+    AnchorSideRight.Control = AlphaEdit
+    Left = 101
+    Height = 15
+    Top = 12
+    Width = 45
+    Anchors = [akTop, akRight]
+    BorderSpacing.Right = 8
+    Caption = 'Alpha = '
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = AlphaScroll
+    AnchorSideTop.Side = asrBottom
+    Left = 8
+    Height = 15
+    Top = 66
+    Width = 15
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 4
+    Caption = '0.0'
+    ParentColor = False
+  end
+  object Label3: TLabel
+    AnchorSideTop.Control = AlphaScroll
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 329
+    Height = 15
+    Top = 66
+    Width = 15
+    Anchors = [akTop, akRight]
+    BorderSpacing.Top = 4
+    BorderSpacing.Right = 8
+    Caption = '1.0'
+    ParentColor = False
+  end
+  object AlphaEdit: TEdit
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Owner
+    Left = 154
+    Height = 23
+    Top = 8
+    Width = 44
+    Alignment = taRightJustify
+    BorderSpacing.Top = 8
+    TabOrder = 0
+    Text = '0.99'
+  end
+  object AlphaScroll: TScrollBar
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = AlphaEdit
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 8
+    Height = 23
+    Top = 39
+    Width = 336
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Max = 1
+    PageSize = 0
+    Position = 1
+    TabOrder = 1
+    OnChange = AlphaScrollChange
+  end
+  object CancelBtn: TButton
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = OKBtn
+    Left = 228
+    Height = 25
+    Top = 97
+    Width = 62
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Cancel'
+    ModalResult = 2
+    TabOrder = 2
+  end
+  object OKBtn: TButton
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 302
+    Height = 25
+    Top = 97
+    Width = 42
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'OK'
+    ModalResult = 1
+    TabOrder = 3
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label3
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 0
+    Height = 8
+    Top = 81
+    Width = 352
+    Anchors = [akTop, akLeft, akRight]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/correlation/expsmoothunit.pas

@@ -0,0 +1,68 @@
+unit ExpSmoothUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls;
+
+type
+
+  { TExpSmoothFrm }
+
+  TExpSmoothFrm = class(TForm)
+    AlphaEdit: TEdit;
+    Bevel1: TBevel;
+    CancelBtn: TButton;
+    OKBtn: TButton;
+    Label1: TLabel;
+    Label2: TLabel;
+    Label3: TLabel;
+    AlphaScroll: TScrollBar;
+    procedure AlphaScrollChange(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+  private
+    { private declarations }
+  public
+    { public declarations }
+    alpha : double;
+  end; 
+
+var
+  ExpSmoothFrm: TExpSmoothFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TExpSmoothFrm }
+
+procedure TExpSmoothFrm.FormActivate(Sender: TObject);
+begin
+  OKBtn.Constraints.MinWidth := MaxValue([OKBtn.Width, CancelBtn.Width]);
+  CancelBtn.Constraints.MinWidth := OKBtn.Constraints.MinWidth;
+end;
+
+procedure TExpSmoothFrm.FormShow(Sender: TObject);
+begin
+    AlphaEdit.Text := '0.99';
+    AlphaScroll.Position := 99;
+    alpha := 0.99;
+end;
+
+procedure TExpSmoothFrm.AlphaScrollChange(Sender: TObject);
+begin
+    AlphaEdit.Text := FloatToStr(AlphaScroll.Position / 100.0);
+    alpha := AlphaScroll.Position / 100.0;
+end;
+
+
+initialization
+  {$I expsmoothunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/correlation/fftunit.lfm

@@ -0,0 +1,122 @@
+object FFTFrm: TFFTFrm
+  Left = 648
+  Height = 127
+  Top = 346
+  Width = 305
+  BorderStyle = bsDialog
+  Caption = 'Fourier Transform Form'
+  ClientHeight = 127
+  ClientWidth = 305
+  OnActivate = FormActivate
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object CancelBtn: TButton
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = OKBtn
+    Left = 177
+    Height = 25
+    Top = 93
+    Width = 62
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Cancel'
+    ModalResult = 2
+    TabOrder = 1
+  end
+  object OKBtn: TButton
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 251
+    Height = 25
+    Top = 93
+    Width = 42
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'OK'
+    ModalResult = 1
+    TabOrder = 2
+  end
+  object Memo1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 8
+    Height = 30
+    Top = 8
+    Width = 289
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'Enter the number of data points to include in the Fourier smoothing.'
+    ParentColor = False
+    WordWrap = True
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Memo1
+    AnchorSideTop.Side = asrBottom
+    Left = 66
+    Height = 23
+    Top = 50
+    Width = 172
+    AutoSize = True
+    BorderSpacing.Left = 64
+    BorderSpacing.Top = 12
+    BorderSpacing.Right = 64
+    BorderSpacing.Bottom = 4
+    BevelOuter = bvNone
+    ClientHeight = 23
+    ClientWidth = 172
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideTop.Control = NptsEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = NptsEdit
+      Left = 0
+      Height = 15
+      Top = 4
+      Width = 100
+      Anchors = [akTop, akRight]
+      BorderSpacing.Right = 8
+      Caption = 'Number of points: '
+      ParentColor = False
+    end
+    object NptsEdit: TEdit
+      AnchorSideTop.Control = Panel1
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 108
+      Height = 23
+      Top = 0
+      Width = 64
+      Alignment = taRightJustify
+      Anchors = [akTop, akRight]
+      TabOrder = 0
+    end
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Panel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 0
+    Height = 8
+    Top = 77
+    Width = 305
+    Anchors = [akTop, akLeft, akRight]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/correlation/fftunit.pas

@@ -0,0 +1,53 @@
+unit FFTUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls;
+
+type
+
+  { TFFTFrm }
+
+  TFFTFrm = class(TForm)
+    Bevel1: TBevel;
+    CancelBtn: TButton;
+    Memo1: TLabel;
+    OKBtn: TButton;
+    NptsEdit: TEdit;
+    Label1: TLabel;
+    Panel1: TPanel;
+    procedure FormActivate(Sender: TObject);
+  private
+    { private declarations }
+  public
+    { public declarations }
+  end; 
+
+var
+  FFTFrm: TFFTFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TFFTFrm }
+
+procedure TFFTFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  w := MaxValue([CancelBtn.Width, OKBtn.Width]);
+  CancelBtn.Constraints.MinWidth := w;
+  OKBtn.Constraints.MinWidth := w;
+end;
+
+initialization
+  {$I fftunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/correlation/moveavgunit.lfm

@@ -0,0 +1,154 @@
+object MoveAvgFrm: TMoveAvgFrm
+  Left = 434
+  Height = 307
+  Top = 163
+  Width = 372
+  Caption = 'Moving Average Specification Form'
+  ClientHeight = 307
+  ClientWidth = 372
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideTop.Control = OrderEdit
+    AnchorSideTop.Side = asrCenter
+    AnchorSideRight.Control = OrderEdit
+    Left = 38
+    Height = 15
+    Top = 17
+    Width = 36
+    Anchors = [akTop, akRight]
+    BorderSpacing.Right = 8
+    Caption = 'Order: '
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = ThetaEdit
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 52
+    Width = 66
+    BorderSpacing.Left = 8
+    Caption = 'Theta Value: '
+    ParentColor = False
+  end
+  object OrderEdit: TEdit
+    AnchorSideLeft.Control = ThetaEdit
+    AnchorSideRight.Control = ThetaList
+    AnchorSideRight.Side = asrBottom
+    Left = 82
+    Height = 23
+    Top = 13
+    Width = 118
+    Alignment = taRightJustify
+    OnKeyPress = OrderEditKeyPress
+    TabOrder = 0
+    Text = 'OrderEdit'
+  end
+  object ThetaEdit: TEdit
+    AnchorSideLeft.Control = Label2
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideRight.Control = ThetaList
+    AnchorSideRight.Side = asrBottom
+    Left = 82
+    Height = 23
+    Top = 48
+    Width = 118
+    Alignment = taRightJustify
+    BorderSpacing.Left = 8
+    OnKeyPress = ThetaEditKeyPress
+    TabOrder = 1
+    Text = 'ThetaEdit'
+  end
+  object ThetaList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Panel1
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 8
+    Height = 219
+    Top = 80
+    Width = 286
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    ItemHeight = 0
+    OnClick = ThetaListClick
+    TabOrder = 2
+  end
+  object Panel1: TPanel
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 302
+    Height = 157
+    Top = 142
+    Width = 62
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    BevelOuter = bvNone
+    ChildSizing.VerticalSpacing = 8
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ClientHeight = 157
+    ClientWidth = 62
+    TabOrder = 3
+    object HelpBtn: TButton
+      Tag = 132
+      Left = 0
+      Height = 25
+      Top = 0
+      Width = 62
+      AutoSize = True
+      Caption = 'Help'
+      OnClick = HelpBtnClick
+      TabOrder = 0
+    end
+    object ResetBtn: TButton
+      Left = 0
+      Height = 25
+      Top = 33
+      Width = 62
+      AutoSize = True
+      Caption = 'Reset'
+      OnClick = ResetBtnClick
+      TabOrder = 1
+    end
+    object CancelBtn: TButton
+      Left = 0
+      Height = 25
+      Top = 66
+      Width = 62
+      AutoSize = True
+      Caption = 'Cancel'
+      ModalResult = 2
+      TabOrder = 2
+    end
+    object ApplyBtn: TButton
+      Left = 0
+      Height = 25
+      Top = 99
+      Width = 62
+      AutoSize = True
+      Caption = 'Apply'
+      OnClick = ApplyBtnClick
+      TabOrder = 3
+    end
+    object OKBtn: TButton
+      Left = 0
+      Height = 25
+      Top = 132
+      Width = 62
+      AutoSize = True
+      Caption = 'OK'
+      ModalResult = 1
+      TabOrder = 4
+    end
+  end
+end

applications/lazstats/source/forms/analysis/correlation/moveavgunit.pas

@@ -0,0 +1,133 @@
+unit MoveAvgUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls,
+  ContextHelpUnit;
+
+type
+
+  { TMoveAvgFrm }
+
+  TMoveAvgFrm = class(TForm)
+    HelpBtn: TButton;
+    Panel1: TPanel;
+    ResetBtn: TButton;
+    CancelBtn: TButton;
+    ApplyBtn: TButton;
+    OKBtn: TButton;
+    ThetaList: TListBox;
+    ThetaEdit: TEdit;
+    Label2: TLabel;
+    OrderEdit: TEdit;
+    Label1: TLabel;
+    procedure ApplyBtnClick(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure OrderEditKeyPress(Sender: TObject; var Key: char);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure ThetaEditKeyPress(Sender: TObject; var Key: char);
+    procedure ThetaListClick(Sender: TObject);
+  private
+    { private declarations }
+  public
+    { public declarations }
+    W : array[0..20] of double;
+    order : integer;
+    currentindex : integer;
+
+  end; 
+
+var
+  MoveAvgFrm: TMoveAvgFrm;
+
+implementation
+
+{ TMoveAvgFrm }
+
+procedure TMoveAvgFrm.ResetBtnClick(Sender: TObject);
+VAR i : integer;
+begin
+    OrderEdit.Text := '';
+    ThetaEdit.Text := '';
+    ThetaList.Clear;
+    currentindex := 0;
+    for i := 0 to 20 do W[i] := 1.0;
+end;
+
+procedure TMoveAvgFrm.ThetaEditKeyPress(Sender: TObject; var Key: char);
+var cellstring : string;
+
+begin
+    if currentindex < 1 then exit;
+    if ord(Key) <> 13 then exit;
+    cellstring := 'Theta(' + IntToStr(currentindex + 1) + ') = ';
+    cellstring := cellstring + ThetaEdit.Text;
+    W[currentindex + 1] := StrToFloat(ThetaEdit.Text);
+end;
+
+procedure TMoveAvgFrm.ThetaListClick(Sender: TObject);
+VAR index : integer;
+begin
+    index := ThetaList.ItemIndex;
+    if index < 0 then exit;
+    currentindex := index;
+    ThetaEdit.Text := '1.0';
+    ThetaEdit.SetFocus;
+end;
+
+procedure TMoveAvgFrm.FormShow(Sender: TObject);
+begin
+    ResetBtnClick(self);
+end;
+
+procedure TMoveAvgFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).tag);
+end;
+
+procedure TMoveAvgFrm.ApplyBtnClick(Sender: TObject);
+var
+    sum : double;
+    i : integer;
+    cellstring : string;
+
+begin
+    ThetaList.Clear;
+    sum := W[0];
+    for i := 1 to order do sum := sum + (2.0 * W[i]);
+    for i := 0 to order do
+    begin
+        W[i] := W[i] / sum;
+        cellstring := 'Theta(' + IntToStr(i+1) + ') = ';
+        cellstring := cellstring + FloatToStr(W[i]);
+        ThetaList.Items.Add(cellstring);
+    end;
+end;
+
+procedure TMoveAvgFrm.OrderEditKeyPress(Sender: TObject; var Key: char);
+VAR    cellstring : string;
+    i : integer;
+
+begin
+    if ord(Key) <> 13 then exit;
+    ThetaList.Clear;
+    order := StrToInt(OrderEdit.Text);
+    for i := 1 to order do
+    begin
+        cellstring := 'Theta(' + IntToStr(i) + ')';
+        ThetaList.Items.Add(cellstring);
+    end;
+end;
+
+initialization
+  {$I moveavgunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/correlation/partialsunit.lfm

@@ -0,0 +1,559 @@
+object PartialsFrm: TPartialsFrm
+  Left = 637
+  Height = 460
+  Top = 307
+  Width = 412
+  AutoSize = True
+  Caption = 'Partial Correlation'
+  ClientHeight = 460
+  ClientWidth = 412
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 15
+    Top = 8
+    Width = 100
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Available Variables:'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = DepVar
+    AnchorSideTop.Control = DepInBtn
+    AnchorSideBottom.Control = DepVar
+    Left = 228
+    Height = 15
+    Top = 25
+    Width = 152
+    Caption = 'Selected Dependent Variable:'
+    ParentColor = False
+  end
+  object Label3: TLabel
+    AnchorSideLeft.Control = PredList
+    Left = 229
+    Height = 15
+    Top = 120
+    Width = 144
+    Caption = 'Selected Predictor Variables'
+    ParentColor = False
+  end
+  object Label4: TLabel
+    AnchorSideLeft.Control = PartList
+    AnchorSideTop.Control = PartInBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 8
+    Height = 15
+    Top = 289
+    Width = 121
+    BorderSpacing.Top = 8
+    Caption = 'Variables Partialed Out:'
+    ParentColor = False
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = DepInBtn
+    Left = 8
+    Height = 220
+    Top = 25
+    Width = 176
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    Constraints.MinHeight = 220
+    Constraints.MinWidth = 175
+    ItemHeight = 0
+    MultiSelect = True
+    TabOrder = 0
+  end
+  object DepInBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = VarList
+    Left = 192
+    Height = 28
+    Top = 25
+    Width = 28
+    Glyph.Data = {
+      36040000424D3604000000000000360000002800000010000000100000000100
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+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+    }
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = DepInBtnClick
+    Spacing = 0
+    TabOrder = 1
+  end
+  object DepOutBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = DepInBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 192
+    Height = 28
+    Top = 57
+    Width = 28
+    BorderSpacing.Top = 4
+    Glyph.Data = {
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+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+    }
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = DepOutBtnClick
+    Spacing = 0
+    TabOrder = 2
+  end
+  object PredInBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideBottom.Control = PredOutBtn
+    Left = 192
+    Height = 28
+    Top = 185
+    Width = 28
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 4
+    Glyph.Data = {
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+    }
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = PredInBtnClick
+    Spacing = 0
+    TabOrder = 4
+  end
+  object PredOutBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideBottom.Control = VarList
+    AnchorSideBottom.Side = asrBottom
+    Left = 192
+    Height = 28
+    Top = 217
+    Width = 28
+    Anchors = [akLeft, akBottom]
+    Glyph.Data = {
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+      FF0068C774D180CD8BFF7CC987FF5DB868FF58B162FF53A95CFF4DA156FF4799
+      4FFF419149FF3B8842FF35803BFF2F7835FF2A702FFFFFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0068C774DB65C371F7FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0068C7740668C774BBFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+    }
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = PredOutBtnClick
+    Spacing = 0
+    TabOrder = 5
+  end
+  object PartInBtn: TBitBtn
+    AnchorSideTop.Control = VarList
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Bevel1
+    Left = 64
+    Height = 28
+    Top = 253
+    Width = 28
+    Anchors = [akTop, akRight]
+    BorderSpacing.Top = 8
+    Glyph.Data = {
+      36040000424D3604000000000000360000002800000010000000100000000100
+      2000000000000004000064000000640000000000000000000000FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00256929C4216425C9FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF002D7533CF488F4DFF458C4AFF2265
+      26D1FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF003C8A430638833ED9519957FF79C07EFF76BF7CFF468D
+      4BFF236627DB20622306FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF0042924AB83D8C45F765AD6CFF7DC282FF7AC180FF4B92
+      50FF276D2CF7246828BBFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF0043944B384E9A55FF81C587FF7EC385FF317A
+      36FFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF0045954CFF85C78CFF82C689FF3682
+      3DFFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF004A9E53FF8ACA91FF87C98EFF3C8A
+      43FFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF0050A659FF8ECC95FF8BCB93FF4292
+      4AFFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF0056AD5FFF93CF9AFF90CE98FF489A
+      50FFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF005BB465FF96D29FFF94D09CFF4EA2
+      57FFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF005FBB6AFF9AD4A3FF98D3A1FF53AA
+      5DFFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF0063C06FFF9ED6A7FF9CD4A5FF59B2
+      63FFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF0066C572FFA2D8ABFFA0D7A9FF5DB8
+      68FFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF0068C774FF67C673FF65C270FF62BE
+      6DFFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+    }
+    Images = MainDataModule.ImageList
+    ImageIndex = 3
+    OnClick = PartInBtnClick
+    Spacing = 0
+    TabOrder = 7
+  end
+  object PartOutBtn: TBitBtn
+    AnchorSideLeft.Control = Bevel1
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = VarList
+    AnchorSideTop.Side = asrBottom
+    Left = 100
+    Height = 28
+    Top = 253
+    Width = 28
+    BorderSpacing.Top = 8
+    Glyph.Data = {
+      36040000424D3604000000000000360000002800000010000000100000000100
+      2000000000000004000064000000640000000000000000000000FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00286E2DFF256929FF216425FF1E60
+      22FFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF002D7533FF74BD7AFF72BD78FF2265
+      26FFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00337D39FF79C07EFF76BF7CFF266B
+      2BFFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF0039853FFF7DC282FF7AC180FF2B72
+      30FFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF003F8D46FF81C587FF7EC385FF317A
+      36FFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF0045954CFF85C78CFF82C689FF3682
+      3DFFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF004A9E53FF8ACA91FF87C98EFF3C8A
+      43FFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF0050A659FF8ECC95FF8BCB93FF4292
+      4AFFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF0056AD5FFF93CF9AFF90CE98FF489A
+      50FFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF005BB465FF96D29FFF94D09CFF5DAC
+      65FF499C5238FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF0065C371BB62BF6EF779C683FF9AD4A3FF98D3A1FF7DC3
+      86FF4FA458F74A9E53B8FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF0068C7740666C472DB7CCA87FF9ED6A7FF9CD4A5FF73C0
+      7DFF55AC5ED950A65906FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF0066C572D17ECA88FF7BC885FF5DB8
+      68CFFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF0067C673C965C270C4FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+    }
+    Images = MainDataModule.ImageList
+    ImageIndex = 2
+    OnClick = PartOutBtnClick
+    Spacing = 0
+    TabOrder = 8
+  end
+  object DepVar: TEdit
+    AnchorSideLeft.Control = DepInBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Label2
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = DepOutBtn
+    AnchorSideBottom.Side = asrBottom
+    Left = 228
+    Height = 23
+    Top = 42
+    Width = 176
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    TabOrder = 3
+    Text = 'DepVar'
+  end
+  object PredList: TListBox
+    AnchorSideLeft.Control = PredInBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = PredOutBtn
+    AnchorSideBottom.Side = asrBottom
+    Left = 229
+    Height = 109
+    Top = 136
+    Width = 175
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 9
+    BorderSpacing.Right = 8
+    Constraints.MinWidth = 175
+    ItemHeight = 0
+    TabOrder = 6
+  end
+  object PartList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label4
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = VarList
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel2
+    Left = 8
+    Height = 105
+    Top = 306
+    Width = 176
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    Constraints.MinHeight = 100
+    ItemHeight = 0
+    TabOrder = 9
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = CancelBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 111
+    Height = 25
+    Top = 427
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 11
+  end
+  object CancelBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 177
+    Height = 25
+    Top = 427
+    Width = 62
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Cancel'
+    ModalResult = 2
+    TabOrder = 12
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = ReturnBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 251
+    Height = 25
+    Top = 427
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 13
+  end
+  object ReturnBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 339
+    Height = 25
+    Top = 427
+    Width = 61
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Return'
+    ModalResult = 1
+    TabOrder = 14
+  end
+  object HelpBtn: TButton
+    Tag = 136
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 48
+    Height = 25
+    Top = 427
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 10
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = VarList
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = VarList
+    AnchorSideTop.Side = asrBottom
+    Left = 92
+    Height = 28
+    Top = 245
+    Width = 8
+    Shape = bsSpacer
+  end
+  object Bevel2: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = ReturnBtn
+    Left = 0
+    Height = 8
+    Top = 411
+    Width = 412
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/correlation/partialsunit.pas

@@ -0,0 +1,411 @@
+unit PartialsUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Buttons, ExtCtrls,
+  MainUnit, MatrixLib, FunctionsLib, OutputUnit, Globals, ContextHelpUnit;
+
+type
+
+  { TPartialsFrm }
+
+  TPartialsFrm = class(TForm)
+    Bevel1: TBevel;
+    Bevel2: TBevel;
+    DepInBtn: TBitBtn;
+    DepOutBtn: TBitBtn;
+    HelpBtn: TButton;
+    PredInBtn: TBitBtn;
+    PredOutBtn: TBitBtn;
+    PartInBtn: TBitBtn;
+    PartOutBtn: TBitBtn;
+    ResetBtn: TButton;
+    CancelBtn: TButton;
+    ComputeBtn: TButton;
+    ReturnBtn: TButton;
+    DepVar: TEdit;
+    Label1: TLabel;
+    Label2: TLabel;
+    Label3: TLabel;
+    Label4: TLabel;
+    PartList: TListBox;
+    PredList: TListBox;
+    VarList: TListBox;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure DepInBtnClick(Sender: TObject);
+    procedure DepOutBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure PartInBtnClick(Sender: TObject);
+    procedure PartOutBtnClick(Sender: TObject);
+    procedure PredInBtnClick(Sender: TObject);
+    procedure PredOutBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+  public
+    { public declarations }
+  end; 
+
+var
+  PartialsFrm: TPartialsFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TPartialsFrm }
+
+procedure TPartialsFrm.ResetBtnClick(Sender: TObject);
+VAR i : integer;
+begin
+     DepVar.Text := '';
+     VarList.Clear;
+     PartList.Clear;
+     PredList.Clear;
+     DepInBtn.Enabled := true;
+     DepOutBtn.Enabled := false;
+     PredInBtn.Enabled := true;
+     PredOutBtn.Enabled := false;
+     PartInBtn.Enabled := true;
+     PartOutBtn.Enabled := false;
+     for i := 1 to OS3MainFrm.DataGrid.ColCount - 1 do
+         VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+end;
+
+procedure TPartialsFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, CancelBtn.Width, ComputeBtn.Width, ReturnBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  CancelBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  ReturnBtn.Constraints.MinWidth := w;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TPartialsFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if OutputFrm = nil then Application.CreateForm(TOutputFrm, OutputFrm);
+end;
+
+procedure TPartialsFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TPartialsFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).tag);
+end;
+
+procedure TPartialsFrm.PartInBtnClick(Sender: TObject);
+VAR i, index : integer;
+begin
+     index := VarList.Items.Count;
+     i := 0;
+     while i < index do
+     begin
+         if (VarList.Selected[i]) then
+         begin
+            PartList.Items.Add(VarList.Items.Strings[i]);
+            VarList.Items.Delete(i);
+            index := index - 1;
+            i := 0;
+         end
+         else i := i + 1;
+     end;
+     PartOutBtn.Enabled := true;
+end;
+
+procedure TPartialsFrm.PartOutBtnClick(Sender: TObject);
+VAR index : integer;
+begin
+   index := PartList.ItemIndex;
+   VarList.Items.Add(PartList.Items.Strings[index]);
+   PartList.Items.Delete(index);
+   if PartList.Items.Count = 0 then PartOutBtn.Enabled := false;
+end;
+
+procedure TPartialsFrm.PredInBtnClick(Sender: TObject);
+VAR i, index : integer;
+begin
+     index := VarList.Items.Count;
+     i := 0;
+     while i < index do
+     begin
+         if (VarList.Selected[i]) then
+         begin
+            PredList.Items.Add(VarList.Items.Strings[i]);
+            VarList.Items.Delete(i);
+            index := index - 1;
+            i := 0;
+         end
+         else i := i + 1;
+     end;
+     PredOutBtn.Enabled := true;
+end;
+
+procedure TPartialsFrm.PredOutBtnClick(Sender: TObject);
+VAR index : integer;
+begin
+   index := PredList.ItemIndex;
+   VarList.Items.Add(PredList.Items.Strings[index]);
+   PredList.Items.Delete(index);
+   if PredList.Items.Count = 0 then PredOutBtn.Enabled := false;
+end;
+
+procedure TPartialsFrm.DepInBtnClick(Sender: TObject);
+VAR index : integer;
+begin
+     index := VarList.ItemIndex;
+     if index < 0 then exit;
+     DepVar.Text := VarList.Items.Strings[index];
+     VarList.Items.Delete(index);
+     DepOutBtn.Enabled := true;
+     DepInBtn.Enabled := false;
+end;
+
+procedure TPartialsFrm.ComputeBtnClick(Sender: TObject);
+var
+   rmatrix, workmat : DblDyneMat;
+   Means, Variances, StdDevs, W, Betas : DblDyneVec;
+   R2Full, R2Cntrl, SemiPart, Partial, df1, df2, F, Prob : double;
+   NoPredVars, NoCntrlVars, DepVarNo, TotNoVars, pcnt, ccnt, count : integer;
+   PredVars, CntrlVars : IntDyneVec;
+   MatVars : IntDyneVec;
+   outline, varstring : string;
+   i, j, K, L, NCases : integer;
+   errorcode : boolean;
+   vtimesw, W1, v : DblDyneMat;
+
+begin
+     DepVarNo := 1;
+     errorcode := false;
+
+    // Get no. of predictor and control variables
+    NoPredVars := PredList.Items.Count;
+    NoCntrlVars := PartList.Items.Count;
+    if (NoPredVars = 0) or (NoCntrlVars = 0) then
+    begin
+        ShowMessage('You must select at least one predictor and one control variable!');
+        exit;
+    end;
+    TotNoVars := NoPredVars + NoCntrlVars + 1;
+    count := NoCases;
+    NCases := NoCases;
+
+    // Allocate space required
+    SetLength(vtimesw,NoVariables,NoVariables);
+    SetLength(v,NoVariables,NoVariables);
+    SetLength(W1,NoVariables,NoVariables);
+    SetLength(rmatrix,NoVariables+1,NoVariables+1); // augmented
+    SetLength(workmat,NoVariables+1,NoVariables+1); // augmented
+    SetLength(PredVars,NoVariables);
+    SetLength(CntrlVars,NoVariables);
+    SetLength(Means,NoVariables);
+    SetLength(Variances,NoVariables);
+    SetLength(StdDevs,NoVariables);
+    SetLength(W,NoVariables);
+    SetLength(Betas,NoVariables);
+    SetLength(MatVars,NoVariables);
+
+    OutputFrm.RichEdit.Clear;
+    OutputFrm.RichEdit.Lines.Add('Partial and Semi-Partial Correlation Analysis');
+    OutputFrm.RichEdit.Lines.Add('');
+
+    // Get column numbers of dependent, predictor and control variables
+    pcnt := 1;
+    for i := 0 to NoPredVars - 1 do
+    begin
+        varstring := PredList.Items.Strings[i];
+        for j := 1 to NoVariables do
+        begin
+            if varstring = OS3MainFrm.DataGrid.Cells[j,0] then
+            begin
+                PredVars[pcnt-1] := j;
+                pcnt := pcnt + 1;
+            end;
+        end;
+    end;
+    ccnt := 1;
+    for i := 0 to NoCntrlVars - 1 do
+    begin
+        varstring := PartList.Items.Strings[i];
+        for j := 1 to NoVariables do
+        begin
+            if varstring = OS3MainFrm.DataGrid.Cells[j,0] then
+            begin
+                CntrlVars[ccnt-1] := j;
+                ccnt := ccnt + 1;
+            end;
+        end;
+    end;
+    varstring := DepVar.Text;
+    for i := 1 to NoVariables do
+        if varstring = OS3MainFrm.DataGrid.Cells[i,0] then DepVarNo := i;
+
+    outline := format('Dependent variable = %s',[OS3MainFrm.DataGrid.Cells[DepVarNo,0]]);
+    OutputFrm.RichEdit.Lines.Add(outline);
+    OutputFrm.RichEdit.Lines.Add('');
+    OutputFrm.RichEdit.Lines.Add('Predictor Variables:');
+    for i := 1 to NoPredVars do
+    begin
+        outline := format('Variable %d = %s',[i+1,OS3MainFrm.DataGrid.Cells[PredVars[i-1],0]]);
+        OutputFrm.RichEdit.Lines.Add(outline);
+    end;
+    OutputFrm.RichEdit.Lines.Add('');
+    OutputFrm.RichEdit.Lines.Add('Control Variables:');
+    for i := 1 to NoCntrlVars do
+    begin
+        outline := format('Variable %d = %s',[i+1,OS3MainFrm.DataGrid.Cells[CntrlVars[i-1],0]]);
+        OutputFrm.RichEdit.Lines.Add(outline);
+    end;
+    OutputFrm.RichEdit.Lines.Add('');
+    if NoPredVars > 1 then
+    begin
+        outline := format('Higher order partialling at level = %d',[NoPredVars]);
+        OutputFrm.RichEdit.Lines.Add(outline);
+        OutputFrm.RichEdit.Lines.Add('');
+    end;
+    if NoCntrlVars > 1 then
+    begin
+        outline := format('Multiple partialling with %d variables.',[NoCntrlVars]);
+        OutputFrm.RichEdit.Lines.Add(outline);
+        OutputFrm.RichEdit.Lines.Add('');
+    end;
+
+    // Now, build the correlation matrix
+    MatVars[0] := DepVarNo;
+    for i := 1 to NoPredVars do MatVars[i] := PredVars[i-1];
+    for i := 1 to NoCntrlVars do MatVars[i + NoPredVars] := CntrlVars[i-1];
+    Correlations(TotNoVars, MatVars, rmatrix, Means, Variances, StdDevs, errorcode, count);
+
+    // Now do Multiple regression models required
+    // Full model first
+    for i := 2 to TotNoVars do
+        for j := 2 to TotNoVars do
+            workmat[i-2,j-2] := rmatrix[i-1,j-1];
+
+    matinv(workmat, vtimesw, v, W1, TotNoVars-1);
+    R2Full := 0.0;
+    for i := 1 to TotNoVars-1 do // rows
+    begin
+        W[i-1] := 0.0;
+        for j := 1 to TotNoVars - 1 do W[i-1] := W[i-1] + (workmat[i-1,j-1] * rmatrix[0,j]);
+        R2Full := R2Full + W[i-1] * rmatrix[0,i];
+    end;
+    outline := format('Squared Multiple Correlation with all variables = %6.3f',[R2Full]);
+    OutputFrm.RichEdit.Lines.Add(outline);
+    OutputFrm.RichEdit.Lines.Add('');
+    OutputFrm.RichEdit.Lines.Add('Standardized Regression Coefficients:');
+    for i := 1 to TotNoVars - 1 do
+    begin
+        outline := format('%10s = %6.3f',[OS3MainFrm.DataGrid.Cells[MatVars[i],0],W[i-1]]);
+        OutputFrm.RichEdit.Lines.Add(outline);
+    end;
+    OutputFrm.RichEdit.Lines.Add('');
+
+    // Now do model for Partial and Semi-partial
+    for i := 1 to NoCntrlVars do
+    begin
+        K := i + 1 + NoPredVars;
+        for j := 1 to NoCntrlVars do
+        begin
+            L := j + 1 + NoPredVars;
+            workmat[i-1,j-1] := rmatrix[K-1,L-1];
+        end;
+    end;
+    matinv(workmat, vtimesw, v, W1, NoCntrlVars);
+    R2Cntrl := 0.0;
+    for i := 1 to NoCntrlVars do
+    begin
+        L := i + 1 + NoPredVars;
+        W[i-1] := 0.0;
+        for j := 1 to NoCntrlVars do
+        begin
+                K := j + 1 + NoPredVars;
+                W[i-1] := W[i-1] + (workmat[i-1,j-1] * rmatrix[0,K-1]);
+        end;
+        R2Cntrl := R2Cntrl + W[i-1] * rmatrix[0,L-1];
+    end;
+    outline := format('Squared Multiple Correlation with control variables = %6.3f',[R2Cntrl]);
+    OutputFrm.RichEdit.Lines.Add(outline);
+    OutputFrm.RichEdit.Lines.Add('');
+    OutputFrm.RichEdit.Lines.Add('Standardized Regression Coefficients:');
+    for i := 1 to NoCntrlVars do
+    begin
+        outline := format('%10s = %6.3f',[OS3MainFrm.DataGrid.Cells[MatVars[i+NoPredVars],0],W[i-1]]);
+        OutputFrm.RichEdit.Lines.Add(outline);
+    end;
+    OutputFrm.RichEdit.Lines.Add('');
+
+    SemiPart := R2Full - R2Cntrl;
+    Partial := SemiPart / (1.0 - R2Cntrl);
+    df1 := TotNoVars - 1 - NoCntrlVars;
+    df2 := count - TotNoVars;
+    F := (SemiPart / (1.0 - R2Full)) * (df2 / df1);
+    Prob := probf(F,df1,df2);
+
+    // Report results
+    OutputFrm.RichEdit.Lines.Add('');
+    outline := format('Partial Correlation = %6.3f',[sqrt(Partial)]);
+    OutputFrm.RichEdit.Lines.Add(outline);
+    OutputFrm.RichEdit.Lines.Add('');
+    outline := format('Semi-Partial Correlation = %6.3f',[sqrt(SemiPart)]);
+    OutputFrm.RichEdit.Lines.Add(outline);
+    OutputFrm.RichEdit.Lines.Add('');
+    outline := format('F = %8.3f with probability = %6.4f, D.F.1 = %3.0f and D.F.2 = %3.0f',[F,Prob,df1,df2]);
+    OutputFrm.RichEdit.Lines.Add(outline);
+    OutputFrm.ShowModal;
+
+    // clean up the heap
+    MatVars := nil;
+    Betas := nil;
+    W := nil;
+    Variances := nil;
+    StdDevs := nil;
+    Means := nil;
+    CntrlVars := nil;
+    PredVars := nil;
+    workmat := nil;
+    rmatrix := nil;
+    v := nil;
+    W1 := nil;
+    vtimesw := nil;
+end;
+
+procedure TPartialsFrm.DepOutBtnClick(Sender: TObject);
+begin
+     VarList.Items.Add(DepVar.Text);
+     DepVar.Text := '';
+     DepInBtn.Enabled := true;
+     DepOutBtn.Enabled := false;
+end;
+
+
+initialization
+  {$I partialsunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/correlation/pointsunit.lfm

@@ -0,0 +1,81 @@
+object PointsFrm: TPointsFrm
+  Left = 506
+  Height = 470
+  Top = 217
+  Width = 736
+  Caption = 'Points Form'
+  ClientHeight = 470
+  ClientWidth = 736
+  OnActivate = FormActivate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Image1: TImage
+    Left = 0
+    Height = 424
+    Top = 0
+    Width = 736
+    Align = alClient
+  end
+  object Panel1: TPanel
+    Left = 0
+    Height = 46
+    Top = 424
+    Width = 736
+    Align = alBottom
+    AutoSize = True
+    BevelOuter = bvNone
+    BorderStyle = bsSingle
+    ClientHeight = 42
+    ClientWidth = 732
+    TabOrder = 0
+    object MsgEdit: TEdit
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Panel1
+      AnchorSideTop.Side = asrCenter
+      Left = 8
+      Height = 23
+      Top = 10
+      Width = 335
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 8
+      BorderSpacing.Bottom = 8
+      TabOrder = 0
+      Text = 'MsgEdit'
+    end
+    object PrintBtn: TButton
+      AnchorSideTop.Control = Panel1
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = ReturnBtn
+      Left = 600
+      Height = 25
+      Top = 9
+      Width = 51
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Right = 12
+      Caption = 'Print'
+      OnClick = PrintBtnClick
+      TabOrder = 1
+    end
+    object ReturnBtn: TButton
+      AnchorSideTop.Control = Panel1
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 663
+      Height = 25
+      Top = 9
+      Width = 61
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Top = 8
+      BorderSpacing.Right = 8
+      BorderSpacing.Bottom = 8
+      Caption = 'Return'
+      ModalResult = 1
+      OnClick = ReturnBtnClick
+      TabOrder = 2
+    end
+  end
+end

applications/lazstats/source/forms/analysis/correlation/pointsunit.pas

@@ -0,0 +1,227 @@
+unit PointsUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  ExtCtrls, StdCtrls, Printers,
+  Globals;
+
+type
+
+  { TPointsFrm }
+
+  TPointsFrm = class(TForm)
+    Image1: TImage;
+    PrintBtn: TButton;
+    ReturnBtn: TButton;
+    MsgEdit: TEdit;
+    Panel1: TPanel;
+//    procedure FormPaint(Sender: TObject);
+//    procedure FormResize(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure PrintBtnClick(Sender: TObject);
+    procedure PtsPlot(Sender: TObject);
+    procedure ReturnBtnClick(Sender: TObject);
+
+  private
+    { private declarations }
+
+  public
+    { public declarations }
+    pts : DblDyneVec;
+    avg : DblDyneVec;
+    LabelOne : string;
+    LabelTwo : string;
+    NoCases : integer;
+    Title : string;
+//    Caption : string;
+
+  end; 
+
+var
+  PointsFrm: TPointsFrm;
+
+implementation
+
+{ TPointsFrm }
+
+uses
+  Math;
+
+procedure TPointsFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  w := MaxValue([PrintBtn.Width, ReturnBtn.Width]);
+  PrintBtn.Constraints.MinWidth := w;
+  ReturnBtn.Constraints.MinWidth := w;
+end;
+
+procedure TPointsFrm.FormShow(Sender: TObject);
+begin
+//    Image1.Canvas.Clear;
+    Image1.Canvas.Brush.Color := clWhite;
+    Image1.Canvas.FillRect(0, 0, Image1.Width, Image1.Height);
+    PtsPlot(self);
+end;
+
+procedure TPointsFrm.PrintBtnClick(Sender: TObject);
+var
+        r : Trect;
+begin
+        with Printer do
+        begin
+                Printer.Orientation := poPortrait;
+                r := Rect(20,20,printer.pagewidth-20,printer.pageheight div 2 + 20);
+                BeginDoc;
+                Canvas.StretchDraw(r,Image1.Picture.BitMap);
+                EndDoc;
+        end;
+end;
+
+procedure TPointsFrm.PtsPlot(Sender: TObject);
+var
+    topmarg, botmarg, leftmarg, rightmarg, verthi, horizlong : integer;
+    X, Y, yincrement, labelheight, i: integer;
+    labelstring, labelstr : string;
+    Xstep, Ystep, yprop, scaley, xprop, scalex, Min, Max : double;
+begin
+    height := Image1.Canvas.Height;
+    width := Image1.Canvas.Width;
+    topmarg := height div 10;
+    verthi := height - (2 * topmarg);
+    botmarg := topmarg + verthi;
+    botmarg := height;
+    leftmarg := width div 10;
+    horizlong := width - 2 * leftmarg;
+    rightmarg := leftmarg + horizlong;
+    // get max and min of values to plot
+    Max := -1000.0;
+    Min := 1000.0;
+    for i := 0 to NoCases - 1 do
+    begin
+        if (pts[i] > Max) then Max := pts[i];
+        if (avg[i] > Max) then Max := avg[i];
+        if (pts[i] < Min) then Min := pts[i];
+        if (avg[i] < Min) then Min := avg[i];
+    end;
+    yincrement := verthi div 20;
+    Image1.Canvas.Pen.Color := clBlack;
+
+    // print title at top, centered
+    labelstring := 'Plot of Original and ';
+    labelstring := labelstring + Title;
+//    labelstring := labelstring + DepVarEdit.Text;
+    X := (leftmarg + horizlong div 2) - (Image1.Canvas.TextWidth(labelstring) div 2);
+    Y := 1;
+    Image1.Canvas.TextOut(X,Y,labelstring);
+
+    // draw left axis
+    X := leftmarg;
+    Y := botmarg;
+    Image1.Canvas.MoveTo(X,Y);
+    Y := topmarg;
+    Image1.Canvas.LineTo(X,Y);
+
+    // scale to left of vertical axis
+    Ystep := (Max - Min) / 20;
+    for i := 0 to 20 do
+    begin
+        Y := topmarg + (i * yincrement);
+        labelstr := format('%4.2f -',[Max - (Ystep * i)]);
+        labelstring := labelstr;
+        X := leftmarg - Image1.Canvas.TextWidth(labelstring);
+        Image1.Canvas.TextOut(X,Y,labelstring);
+    end;
+
+    // Make legend axis on bottom
+    X := leftmarg;
+    Y := botmarg;
+    Xstep := horizlong / 20;
+    xprop := NoCases / 20;
+    Image1.Canvas.MoveTo(X,Y);
+    X := rightmarg;
+    Image1.Canvas.LineTo(X,Y);
+    for i := 0 to 20 do
+    begin
+        X := leftmarg + round(Xstep * i);
+        labelstring := '|';
+        Image1.Canvas.TextOut(X,Y,labelstring);
+        labelstring := IntToStr(round((xprop * i) + 1));
+        Y := Y + 5;
+        Image1.Canvas.TextOut(X,Y,labelstring);
+        Y := botmarg;
+    end;
+    labelstring := 'CASES';
+    X := (leftmarg + horizlong div 2) - (Canvas.TextWidth(labelstring) div 2);
+    Y := botmarg + Image1.Canvas.TextHeight(labelstring);
+    Image1.Canvas.TextOut(X,Y,labelstring);
+
+    // Plot lines from point to point
+    Image1.Canvas.Pen.Color := clRed;
+    for i := 0 to NoCases - 1 do
+    begin
+        yprop := (Max - pts[i]) / (Max - Min);
+        scaley := yprop * verthi;
+        xprop := i / NoCases;
+        scalex := xprop * horizlong;
+        X := leftmarg + round(scalex);
+        Y := topmarg + round(scaley);
+        if (i = 0) then Image1.Canvas.MoveTo(X,Y)
+          else Image1.Canvas.LineTo(X,Y);
+        Image1.Canvas.Ellipse(X-3,Y-3,X+3,Y+3);
+    end;
+
+    // Plot average points
+    Image1.Canvas.Pen.Color := clBlue;
+    for i := 0 to NoCases - 1 do
+    begin
+        yprop := (Max - avg[i]) / (Max - Min);
+        scaley := yprop * verthi;
+        xprop := i / NoCases;
+        scalex := xprop * horizlong;
+        X := leftmarg + round(scalex);
+        Y := topmarg + round(scaley);
+        if (i = 0) then Image1.Canvas.MoveTo(X,Y)
+          else Image1.Canvas.LineTo(X,Y);
+        Image1.Canvas.Ellipse(X-3,Y-3,X+3,Y+3);
+    end;
+
+    // Show legend at right
+    X := rightmarg;
+    labelstring := LabelOne;
+    labelheight := Image1.Canvas.TextHeight(labelstring);
+    Y := 5 * labelheight;
+    Image1.Canvas.Font.Color := clRed;
+    Image1.Canvas.TextOut(X,Y,labelstring);
+    labelstring := LabelTwo;
+    Y := 6 * labelheight;
+    Image1.Canvas.Font.Color := clBlue;
+    Image1.Canvas.TextOut(X,Y,labelstring);
+end;
+
+procedure TPointsFrm.ReturnBtnClick(Sender: TObject);
+begin
+  PointsFrm.Hide;
+end;
+
+{
+procedure TPointsFrm.FormPaint(Sender: TObject);
+begin
+    PtsPlot;
+end;
+
+procedure TPointsFrm.FormResize(Sender: TObject);
+begin
+    PtsPlot;
+end;
+}
+initialization
+  {$I pointsunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/correlation/polynomialunit.lfm

@@ -0,0 +1,128 @@
+object PolynomialFrm: TPolynomialFrm
+  Left = 822
+  Height = 99
+  Top = 421
+  Width = 351
+  AutoSize = True
+  BorderStyle = bsDialog
+  Caption = 'Polynomial Regression Smoothing'
+  ClientHeight = 99
+  ClientWidth = 351
+  OnActivate = FormActivate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object CancelBtn: TButton
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = OKBtn
+    Left = 223
+    Height = 25
+    Top = 63
+    Width = 62
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Cancel'
+    ModalResult = 2
+    TabOrder = 2
+  end
+  object OKBtn: TButton
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 297
+    Height = 25
+    Top = 63
+    Width = 42
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'OK'
+    ModalResult = 1
+    TabOrder = 3
+  end
+  object HelpBtn: TButton
+    Tag = 139
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = CancelBtn
+    Left = 160
+    Height = 25
+    Top = 63
+    Width = 51
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 1
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Owner
+    Left = 99
+    Height = 23
+    Top = 16
+    Width = 152
+    AutoSize = True
+    BorderSpacing.Left = 100
+    BorderSpacing.Top = 16
+    BorderSpacing.Right = 100
+    BorderSpacing.Bottom = 8
+    BevelOuter = bvNone
+    ClientHeight = 23
+    ClientWidth = 152
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = PolyEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = PolyEdit
+      Left = 0
+      Height = 15
+      Top = 4
+      Width = 97
+      Anchors = [akTop, akRight]
+      BorderSpacing.Right = 8
+      Caption = 'Polynomial order :'
+      ParentColor = False
+    end
+    object PolyEdit: TEdit
+      AnchorSideTop.Control = Panel1
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 105
+      Height = 23
+      Top = 0
+      Width = 47
+      Alignment = taRightJustify
+      Anchors = [akTop, akRight]
+      TabOrder = 0
+      Text = 'PolyEdit'
+    end
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Panel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 0
+    Height = 8
+    Top = 47
+    Width = 351
+    Anchors = [akTop, akLeft, akRight]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/correlation/polynomialunit.pas

@@ -0,0 +1,69 @@
+unit PolynomialUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls,
+  ContextHelpUnit;
+
+type
+
+  { TPolynomialFrm }
+
+  TPolynomialFrm = class(TForm)
+    Bevel1: TBevel;
+    CancelBtn: TButton;
+    HelpBtn: TButton;
+    OKBtn: TButton;
+    Panel1: TPanel;
+    PolyEdit: TEdit;
+    Label1: TLabel;
+    procedure FormActivate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+  private
+    { private declarations }
+  public
+    { public declarations }
+  end; 
+
+var
+  PolynomialFrm: TPolynomialFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TPolynomialFrm }
+
+procedure TPolynomialFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  w := MaxValue([HelpBtn.Width, CancelBtn.Width, OKBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  CancelBtn.Constraints.MinWidth := w;
+  OKBtn.Constraints.MinWidth := w;
+end;
+
+procedure TPolynomialFrm.FormShow(Sender: TObject);
+begin
+    PolyEdit.Text := '1';
+end;
+
+procedure TPolynomialFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).tag);
+end;
+
+initialization
+  {$I polynomialunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/correlation/rmatunit.lfm

@@ -0,0 +1,389 @@
+object RMatFrm: TRMatFrm
+  Left = 597
+  Height = 482
+  Top = 185
+  Width = 409
+  AutoSize = True
+  Caption = 'Product-Moment Correlations'
+  ClientHeight = 482
+  ClientWidth = 409
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 15
+    Top = 8
+    Width = 114
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Variables to Correlate:'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = ListBox1
+    AnchorSideTop.Control = Owner
+    Left = 235
+    Height = 15
+    Top = 8
+    Width = 96
+    BorderSpacing.Top = 8
+    Caption = 'Selected Variables:'
+    ParentColor = False
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = AllBtn
+    AnchorSideBottom.Control = GroupBox1
+    Left = 8
+    Height = 223
+    Top = 25
+    Width = 165
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Constraints.MinHeight = 220
+    ItemHeight = 0
+    MultiSelect = True
+    TabOrder = 0
+  end
+  object InBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    Left = 190
+    Height = 28
+    Top = 29
+    Width = 28
+    Glyph.Data = {
+      36040000424D3604000000000000360000002800000010000000100000000100
+      2000000000000004000064000000640000000000000000000000FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00216324B81D5E2006FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF002A702F38256929F7216324D9FFFFFF00FFFFFF00FFFFFF00FFFFFF0061BE
+      6DFF5DB868FF58B162FF53A95CFF4DA156FF47994FFF419149FF3B8842FF3580
+      3BFF3F8845FF59A15EFF448B49FF216324CFFFFFFF00FFFFFF00FFFFFF0065C3
+      71FFA0D7A9FF9CD5A5FF98D3A1FF94D09DFF90CE98FF8BCB93FF87C98EFF82C6
+      89FF7EC384FF7AC180FF76BE7CFF458C4AFF216324C4FFFFFF00FFFFFF0068C7
+      74FFA5DAAEFFA2D8ABFF9ED6A7FF9AD4A3FF96D29FFF93CF9AFF8ECC95FF89CA
+      90FF85C78BFF81C587FF7DC282FF4A9150FF256929C9FFFFFF00FFFFFF0068C7
+      74FF68C774FF65C371FF61BE6DFF5DB868FF58B162FF53A95CFF4DA156FF4799
+      4FFF419149FF5AA362FF559D5CFF2F7835D1FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00419149F73B8842DBFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0047994FBB41914906FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+    }
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = InBtnClick
+    Spacing = 0
+    TabOrder = 1
+  end
+  object OutBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    Left = 190
+    Height = 28
+    Top = 64
+    Width = 28
+    Glyph.Data = {
+      36040000424D3604000000000000360000002800000010000000100000000100
+      2000000000000004000064000000640000000000000000000000FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF004DA1560647994FB8FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0053A95CD94DA156F747994F38FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF005DB868CF71BE7BFF7AC183FF5BAA64FF47994FFF419149FF3B8842FF3580
+      3BFF2F7835FF2A702FFF256929FF216324FF1D5E20FFFFFFFF00FFFFFF0065C3
+      71C47BC886FF9CD5A5FF98D3A1FF94D09DFF90CE98FF8BCB93FF87C98EFF82C6
+      89FF7EC384FF7AC180FF76BE7CFF72BD78FF216324FFFFFFFF00FFFFFF0068C7
+      74C97FCC8AFFA2D8ABFF9ED6A7FF9AD4A3FF96D29FFF93CF9AFF8ECC95FF89CA
+      90FF85C78BFF81C587FF7DC282FF78C07EFF256929FFFFFFFF00FFFFFF00FFFF
+      FF0068C774D180CD8BFF7CC987FF5DB868FF58B162FF53A95CFF4DA156FF4799
+      4FFF419149FF3B8842FF35803BFF2F7835FF2A702FFFFFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0068C774DB65C371F7FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0068C7740668C774BBFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+    }
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = OutBtnClick
+    Spacing = 0
+    TabOrder = 2
+  end
+  object AllBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    Left = 181
+    Height = 25
+    Top = 120
+    Width = 46
+    AutoSize = True
+    Caption = 'ALL'
+    OnClick = AllBtnClick
+    Spacing = 0
+    TabOrder = 3
+  end
+  object ListBox1: TListBox
+    AnchorSideLeft.Control = AllBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Label2
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = GroupBox1
+    Left = 235
+    Height = 223
+    Top = 25
+    Width = 166
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    ItemHeight = 0
+    TabOrder = 4
+  end
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 177
+    Top = 256
+    Width = 393
+    Anchors = [akLeft, akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    Caption = 'Options:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.Layout = cclTopToBottomThenLeftToRight
+    ChildSizing.ControlsPerLine = 7
+    ClientHeight = 157
+    ClientWidth = 389
+    TabOrder = 5
+    object CPChkBox: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 222
+      Caption = 'Show Cross-Products Matrix'
+      TabOrder = 0
+    end
+    object CovChkBox: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 27
+      Width = 222
+      Caption = 'Show Variance-Covariance Matrix'
+      TabOrder = 1
+    end
+    object CorrsChkBox: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 48
+      Width = 222
+      Caption = 'Show the Intercorrelation Matrix'
+      TabOrder = 2
+    end
+    object MeansChkBox: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 69
+      Width = 222
+      Caption = 'Show Means'
+      TabOrder = 3
+    end
+    object VarChkBox: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 90
+      Width = 222
+      Caption = 'Show Variances'
+      TabOrder = 4
+    end
+    object SDChkBox: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 111
+      Width = 222
+      Caption = 'Show Standard Deviations'
+      TabOrder = 5
+    end
+    object PairsChkBox: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 132
+      Width = 222
+      Caption = 'Pair-Wise Calculations'
+      TabOrder = 6
+    end
+    object AugmentChk: TCheckBox
+      Left = 234
+      Height = 19
+      Top = 6
+      Width = 143
+      Caption = 'Autmented'
+      TabOrder = 7
+    end
+    object GridMatChk: TCheckBox
+      Left = 234
+      Height = 19
+      Top = 27
+      Width = 143
+      Caption = 'Save Matrix to Grid'
+      TabOrder = 8
+    end
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = CancelBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 108
+    Height = 25
+    Top = 449
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 7
+  end
+  object CancelBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 174
+    Height = 25
+    Top = 449
+    Width = 62
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Cancel'
+    ModalResult = 2
+    TabOrder = 8
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = ReturnBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 248
+    Height = 25
+    Top = 449
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 9
+  end
+  object ReturnBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 336
+    Height = 25
+    Top = 449
+    Width = 61
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Return'
+    ModalResult = 1
+    TabOrder = 10
+  end
+  object HelpBtn: TButton
+    Tag = 144
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 45
+    Height = 25
+    Top = 449
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 6
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = ReturnBtn
+    Left = 0
+    Height = 8
+    Top = 433
+    Width = 409
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/correlation/rmatunit.pas

@@ -0,0 +1,479 @@
+unit RMatUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Buttons, ExtCtrls,
+  MainUnit, Globals, MatrixLib, OutputUnit, DataProcs, FunctionsLib,
+  ContextHelpUnit;
+
+type
+
+  { TRMatFrm }
+
+  TRMatFrm = class(TForm)
+    Bevel1: TBevel;
+    GridMatChk: TCheckBox;
+    HelpBtn: TButton;
+    InBtn: TBitBtn;
+    OutBtn: TBitBtn;
+    AllBtn: TBitBtn;
+    AugmentChk: TCheckBox;
+    ResetBtn: TButton;
+    CancelBtn: TButton;
+    ComputeBtn: TButton;
+    ReturnBtn: TButton;
+    CPChkBox: TCheckBox;
+    CovChkBox: TCheckBox;
+    CorrsChkBox: TCheckBox;
+    MeansChkBox: TCheckBox;
+    VarChkBox: TCheckBox;
+    SDChkBox: TCheckBox;
+    PairsChkBox: TCheckBox;
+    GroupBox1: TGroupBox;
+    Label1: TLabel;
+    Label2: TLabel;
+    ListBox1: TListBox;
+    VarList: TListBox;
+    procedure AllBtnClick(Sender: TObject);
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure InBtnClick(Sender: TObject);
+    procedure OutBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    procedure PairsCalc(NoVars : integer;
+                    VAR ColNoSelected : IntDyneVec;
+                    VAR Matrix : DblDyneMat;
+                    VAR ColLabels : StrDyneVec);
+
+  public
+    { public declarations }
+  end; 
+
+var
+  RMatFrm: TRMatFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TRMatFrm }
+
+procedure TRMatFrm.ResetBtnClick(Sender: TObject);
+VAR i : integer;
+begin
+     VarList.Clear;
+     ListBox1.Clear;
+     for i := 1 to NoVariables do
+     begin
+          VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+     end;
+     InBtn.Enabled := true;
+     OutBtn.Enabled := false;
+     AugmentChk.Checked := false;
+     PairsChkBox.Checked := false;
+     CPChkBox.Checked := false;
+     CovChkBox.Checked := false;
+     CorrsChkBox.Checked := true;
+     MeansChkBox.Checked := true;
+     VarChkBox.Checked := false;
+     SDChkBox.Checked := true;
+end;
+
+procedure TRMatFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(Self);
+end;
+
+procedure TRMatFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, CancelBtn.Width, ComputeBtn.Width, ReturnBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  CancelBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  ReturnBtn.Constraints.MinWidth := w;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TRMatFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if OutputFrm = nil then
+    Application.CreateForm(TOutputFrm, OutputFrm);
+end;
+
+procedure TRMatFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).tag);
+end;
+
+procedure TRMatFrm.AllBtnClick(Sender: TObject);
+VAR count, index : integer;
+begin
+     count := VarList.Items.Count;
+     for index := 0 to count-1 do
+     begin
+          ListBox1.Items.Add(VarList.Items.Strings[index]);
+     end;
+     VarList.Clear;
+end;
+
+procedure TRMatFrm.ComputeBtnClick(Sender: TObject);
+label cleanit;
+var
+   i, j : integer;
+   cellstring : string;
+   NoVars : integer;
+   ColNoSelected : IntDyneVec;
+   Matrix : DblDyneMat;
+   TestMat : DblDyneMat;
+   Means : DblDyneVec;
+   Variances : DblDyneVec;
+   StdDevs : DblDyneVec;
+   RowLabels, ColLabels : StrDyneVec;
+   Augment : boolean;
+   title : string;
+   errorcode : boolean;
+   Ngood : integer;
+   t, Probr, N: double;
+begin
+     errorcode := false;
+     OutputFrm.RichEdit.Clear;
+     NoVars := ListBox1.Items.Count;
+     Augment := false;
+     Ngood := 0;
+
+     SetLength(ColNoSelected,NoVars+1);
+     SetLength(Matrix,NoVars+1,NoVars+1); // 1 more for possible augmentation
+     SetLength(TestMat,NoVars,NoVars);
+     SetLength(Means,NoVars+1);
+     SetLength(Variances,NoVars+1);
+     SetLength(StdDevs,NoVars+1);
+     SetLength(RowLabels,NoVars+1);
+     SetLength(ColLabels,NoVars+1);
+
+     // identify the included variable locations and their labels
+     for i := 1 to NoVars do
+     begin
+          cellstring := ListBox1.Items.Strings[i-1];
+          for j := 1 to NoVariables do
+          begin
+               if cellstring = OS3MainFrm.DataGrid.Cells[j,0] then
+               begin
+                    ColNoSelected[i-1] := j;
+                    RowLabels[i-1] := cellstring;
+                    ColLabels[i-1] := cellstring;
+               end;
+          end;
+     end;
+
+     if PairsChkBox.Checked then
+     begin
+             PairsCalc(NoVars,ColNoSelected,Matrix,ColLabels);
+             goto cleanit;
+     end;
+
+     if AugmentChk.Checked then
+     begin
+          Augment := true;
+          ColLabels[NoVars] := 'Intercept';
+          RowLabels[NoVars] := 'Intercept';
+     end;
+
+     // get cross-products if elected
+     if CPChkBox.Checked = true then
+     begin
+          GridXProd(NoVars,ColNoSelected,Matrix,Augment,Ngood);
+          title := 'Cross-Products Matrix';
+          if NOT Augment then
+          MAT_PRINT(Matrix,NoVars,NoVars,title,RowLabels,ColLabels,Ngood)
+          else
+          MAT_PRINT(Matrix,NoVars+1,NoVars+1,title,RowLabels,ColLabels,Ngood);
+     end;
+
+     if CovChkBox.Checked = true then // get variance-covariance mat. if elected
+     begin
+          title := 'Variance-Covariance Matrix';
+          GridCovar(NoVars,ColNoSelected,Matrix,Means,Variances,StdDevs,errorcode, Ngood);
+          MAT_PRINT(Matrix,NoVars,NoVars,title,RowLabels,ColLabels,Ngood);
+     end;
+
+     if CorrsChkBox.Checked = true then // get correlations
+     begin
+          title := 'Product-Moment Correlations Matrix';
+          Correlations(NoVars,ColNoSelected,Matrix,Means,Variances,StdDevs,errorcode,Ngood);
+          MAT_PRINT(Matrix,NoVars,NoVars,title,RowLabels,ColLabels,Ngood);
+          N := Ngood;
+          for i := 1 to NoVars do
+          begin
+               for j := i+1 to NoVars do
+               begin
+                    t := Matrix[i-1][j-1] * (sqrt((N-2.0) /
+                         (1.0 - (Matrix[i-1][j-1] * Matrix[i-1][j-1]))));
+                    TestMat[i-1,j-1] := t;
+                    Probr := probt(t,N - 2.0);
+                    TestMat[j-1,i-1] := Probr;
+                    TestMat[i-1,i-1] := 0.0;
+
+               end;
+          end;
+          title := 't-test values (upper) and probabilities of t (lower)';
+          MAT_PRINT(TestMat,NoVars,NoVars,title,RowLabels,ColLabels,Ngood);
+     end;
+
+     title := 'Means';
+     if MeansChkBox.Checked = true then
+             DynVectorPrint(Means,NoVars,title,ColLabels,Ngood);
+
+     title := 'Variances';
+     if VarChkBox.Checked = true then
+             DynVectorPrint(Variances,NoVars,title,ColLabels,Ngood);
+
+     title := 'Standard Deviations';
+     if SDChkBox.Checked = true then
+             DynVectorPrint(StdDevs,NoVars,title,ColLabels,Ngood);
+
+     if errorcode then
+          OutputFrm.RichEdit.Lines.Add('One or more correlations could not be computed due to zero variance of a variable.');
+
+     OutputFrm.ShowModal;
+
+     if GridMatChk.Checked then MatToGrid(Matrix,NoVars);
+     // clean up the heap
+cleanit:
+     ColLabels := nil;
+     RowLabels := nil;
+     StdDevs := nil;
+     Variances := nil;
+     Means := nil;
+     Matrix := nil;
+     ColNoSelected := nil;
+end;
+
+procedure TRMatFrm.InBtnClick(Sender: TObject);
+VAR i, index : integer;
+begin
+     index := VarList.Items.Count;
+     i := 0;
+     while i < index do
+     begin
+         if (VarList.Selected[i]) then
+         begin
+            ListBox1.Items.Add(VarList.Items.Strings[i]);
+            VarList.Items.Delete(i);
+            index := index - 1;
+            i := 0;
+         end
+         else i := i + 1;
+     end;
+
+     OutBtn.Enabled := true;
+end;
+
+procedure TRMatFrm.OutBtnClick(Sender: TObject);
+VAR index : integer;
+begin
+   index := ListBox1.ItemIndex;
+   VarList.Items.Add(ListBox1.Items.Strings[index]);
+   ListBox1.Items.Delete(index);
+   InBtn.Enabled := true;
+end;
+
+procedure TRMatFrm.PairsCalc(NoVars: integer; var ColNoSelected: IntDyneVec;
+  var Matrix: DblDyneMat; var ColLabels: StrDyneVec);
+Label nextpart;
+var
+   i, j, k, XCol, YCol, Npairs, N : integer;
+   X, Y, XMean, XVar, XSD, YMean, YVar, YSD, pmcorr, z, rprob : double;
+   strout : string;
+   NMatrix : IntDyneMat;
+   tMatrix : DblDyneMat;
+   ProbMat : DblDyneMat;
+   startpos, endpos : integer;
+
+begin
+     OutputFrm.RichEdit.Clear;
+     SetLength(NMatrix,NoVars,NoVars);
+     SetLength(tMatrix,NoVars,NoVars);
+     SetLength(ProbMat,NoVars,NoVars);
+
+     for i := 1 to NoVars - 1 do
+     begin
+          for j := i + 1 to NoVars do
+          begin
+               XMean := 0.0;
+               XVar := 0.0;
+               XCol := ColNoSelected[i-1];
+               YMean := 0.0;
+               YVar := 0.0;
+               YCol := ColNoSelected[j-1];
+               pmcorr := 0.0;
+               Npairs := 0;
+               strout := ColLabels[i-1];
+               strout := strout + ' vs ';
+               strout := strout + ColLabels[j-1];
+               OutputFrm.RichEdit.Lines.Add(strout);
+               for k := 1 to NoCases do
+               begin
+                    if not ValidValue(k,XCol) then continue;
+                    if not ValidValue(k,YCol) then continue;
+                    X := StrToFloat(OS3MainFrm.DataGrid.Cells[XCol,k]);
+                    Y := StrToFloat(OS3MainFrm.DataGrid.Cells[YCol,k]);
+                    pmcorr := pmcorr + (X * Y);
+                    XMean := XMean + X;
+                    YMean := YMean + Y;
+                    XVar := XVar + (X * X);
+                    YVar := YVar + (Y * Y);
+                    Npairs := NPairs + 1;
+               end;
+               if CPChkBox.Checked then
+               begin
+                   strout := format('CrossProducts[%d,%d]=%6.4f, N cases = %d',[i,j,pmcorr,Npairs]);
+                   OutputFrm.RichEdit.Lines.Add(strout);
+               end;
+               pmcorr := pmcorr - (XMean * YMean) / Npairs;
+               pmcorr := pmcorr / (Npairs - 1);
+               if CovChkBox.Checked then
+               begin
+                    strout := format('Covariance[%d,%d]=%6.4f, N cases = %d',[i,j,pmcorr,Npairs]);
+                    OutputFrm.RichEdit.Lines.Add(strout);
+               end;
+               XVar := XVar - (XMean * XMean) / Npairs;
+               XVar := XVar / (Npairs - 1);
+               XSD := sqrt(XVar);
+               YVar := YVar - (YMean * YMean) / Npairs;
+               YVar := YVar / (Npairs - 1);
+               YSD := sqrt(YVar);
+               XMean := XMean / Npairs;
+               YMean := YMean / Npairs;
+               pmcorr := pmcorr / (XSD * YSD);
+               Matrix[i-1,j-1] := pmcorr;
+               Matrix[j-1,i-1] := pmcorr;
+               NMatrix[i-1,j-1] := Npairs;
+               NMatrix[j-1,i-1] := NPairs;
+               if CorrsChkBox.Checked then
+               begin
+                    N := Npairs - 2;
+                    z := abs(pmcorr) * (sqrt((N-2)/(1.0 - (pmcorr * pmcorr))));
+                    rprob := probt(z,N);
+//                  Using Fisher's z transform below gives SPSS results
+//                    N := Npairs - 3;
+//                    z := 0.5 * ln( (1.0 + pmcorr)/(1.0 - pmcorr) );
+//                    z := z / sqrt(1.0/N);
+//                    rprob := probz(z);
+                    strout := format('r[%d,%d]=%6.4f, N cases = %d',[i,j,pmcorr,Npairs]);
+                    OutputFrm.RichEdit.Lines.Add(strout);
+                    strout := format('t value with d.f. %d = %8.4f with Probability > t = %6.4f',[Npairs-2,z,rprob]);
+                    OutputFrm.RichEdit.Lines.Add(strout);
+                    tMatrix[i-1,j-1] := z;
+                    tMatrix[j-1,i-1] := z;
+                    ProbMat[i-1,j-1] := rprob;
+                    ProbMat[j-1,i-1] := rprob;
+               end;
+               if MeansChkBox.Checked or VarChkBox.Checked or SDChkBox.Checked then
+               begin
+                    strout := format('Mean X = %8.4f, Variance X = %8.4f, Std.Dev. X = %8.4f',[XMean,XVar,XSD]);
+                    OutputFrm.RichEdit.Lines.Add(strout);
+                    strout := format('Mean Y = %8.4f, Variance Y = %8.4f, Std.Dev. Y = %8.4f',[YMean,YVar,YSD]);
+                    OutputFrm.RichEdit.Lines.Add(strout);
+               end;
+               OutputFrm.RichEdit.Lines.Add('');
+          end; // next j variable
+          Matrix[i-1,i-1] := 1.0;
+     end; // next i variable
+     Matrix[NoVars-1,NoVars-1] := 1.0;
+     OutputFrm.ShowModal;
+     OutputFrm.RichEdit.Clear;
+     OutputFrm.RichEdit.Lines.Add('Intercorrelation Matrix and Statistics');
+     OutputFrm.RichEdit.Lines.Add('');
+//     strout := 'Correlation Matrix Summary (Ns in lower triangle)';
+//     MAT_PRINT(Matrix,NoVars,NoVars,strout,ColLabels,ColLabels,NoCases);
+     startpos := 1;
+     endpos := 6;
+     if endpos > NoVars then endpos := NoVars;
+     for i := 1 to NoVars do
+     begin
+nextpart:
+          strout := '          ';
+          for j := startpos to endpos do
+               strout := strout + format('     %5d',[j]);
+          OutputFrm.RichEdit.Lines.Add(strout);
+          strout := format('%2d PMCorr.',[i]);
+          for j := startpos to endpos do
+              strout := strout + format('   %7.4f',[Matrix[i-1,j-1]]);
+          OutputFrm.RichEdit.Lines.Add(strout);
+          strout := format('%2d N Size ',[i]);
+          for j := startpos to endpos do
+          begin
+               if j <> i then
+                  strout := strout + format('   %3d    ',[NMatrix[i-1,j-1]])
+               else begin
+                    Npairs := 0;
+                    for k := 1 to NoCases do
+                    begin
+                         if ValidValue(k,ColNoSelected[j-1])
+                         then Npairs := Npairs + 1;
+                    end;
+                    strout := strout + format('   %3d    ',[Npairs]);
+               end;
+          end;
+          OutputFrm.RichEdit.Lines.Add(strout);
+          strout := format('%2d t Value',[i]);
+          for j := startpos to endpos do
+          begin
+              if j <> i then
+                   strout := strout + format('   %7.4f',[tMatrix[i-1,j-1]])
+              else strout := strout + '          ';
+          end;
+          OutputFrm.RichEdit.Lines.Add(strout);
+          strout := format('%2d Prob. t',[i]);
+          for j := startpos to endpos do
+          begin
+              if j <> i then
+                 strout := strout + format('   %7.4f',[ProbMat[i-1,j-1]])
+              else strout := strout + '          ';
+          end;
+          OutputFrm.RichEdit.Lines.Add(strout);
+          OutputFrm.RichEdit.Lines.Add('');
+          if endpos < NoVars then
+          begin
+               startpos := endpos + 1;
+               endpos := endpos + 6;
+               if endpos > NoVars then endpos := NoVars;
+               goto nextpart;
+          end;
+     end;
+     OutputFrm.ShowModal;
+
+     ProbMat := nil;
+     tMatrix := nil;
+     NMatrix := nil;
+end;
+
+initialization
+  {$I rmatunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/cross-classification/abcloglinunit.lfm

@@ -0,0 +1,528 @@
+object ABCLogLinearFrm: TABCLogLinearFrm
+  Left = 596
+  Height = 432
+  Top = 216
+  Width = 371
+  AutoSize = True
+  Caption = 'Log Linear Analysis for AxBxC Classification Table'
+  ClientHeight = 432
+  ClientWidth = 371
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 162
+    Height = 25
+    Top = 399
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 3
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 224
+    Height = 25
+    Top = 399
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 4
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 308
+    Height = 25
+    Top = 399
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 5
+  end
+  object HelpBtn: TButton
+    Tag = 101
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 103
+    Height = 25
+    Top = 399
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 2
+  end
+  object Notebook1: TNotebook
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = FileFromGrp
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 316
+    Top = 67
+    Width = 355
+    PageIndex = 0
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    TabOrder = 1
+    object Page1: TPage
+      object Label3: TLabel
+        AnchorSideLeft.Control = RowVarEdit
+        AnchorSideBottom.Control = RowVarEdit
+        Left = 199
+        Height = 15
+        Top = 8
+        Width = 67
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Row Variable'
+        ParentColor = False
+      end
+      object Label4: TLabel
+        AnchorSideLeft.Control = ColVarEdit
+        AnchorSideBottom.Control = ColVarEdit
+        Left = 199
+        Height = 15
+        Top = 84
+        Width = 87
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Column Variable'
+        ParentColor = False
+      end
+      object Label5: TLabel
+        AnchorSideLeft.Control = SliceVarEdit
+        AnchorSideBottom.Control = SliceVarEdit
+        Left = 199
+        Height = 15
+        Top = 160
+        Width = 68
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Slice Variable'
+        ParentColor = False
+      end
+      object Label6: TLabel
+        AnchorSideLeft.Control = FreqVarEdit
+        AnchorSideBottom.Control = FreqVarEdit
+        Left = 199
+        Height = 15
+        Top = 236
+        Width = 99
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Frequency Variable'
+        ParentColor = False
+      end
+      object VarList: TListBox
+        AnchorSideLeft.Control = Page1
+        AnchorSideTop.Control = Page1
+        AnchorSideRight.Control = RowInBtn
+        AnchorSideBottom.Control = Page1
+        AnchorSideBottom.Side = asrBottom
+        Left = 0
+        Height = 316
+        Top = 0
+        Width = 155
+        Anchors = [akTop, akLeft, akRight, akBottom]
+        BorderSpacing.Right = 8
+        ItemHeight = 0
+        OnSelectionChange = VarListSelectionChange
+        TabOrder = 0
+      end
+      object RowInBtn: TBitBtn
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = VarList
+        Left = 163
+        Height = 28
+        Top = 0
+        Width = 28
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = RowInBtnClick
+        Spacing = 0
+        TabOrder = 1
+      end
+      object RowOutBtn: TBitBtn
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = RowInBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 163
+        Height = 28
+        Top = 32
+        Width = 28
+        BorderSpacing.Top = 4
+        Enabled = False
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = RowOutBtnClick
+        Spacing = 0
+        TabOrder = 2
+      end
+      object ColInBtn: TBitBtn
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = RowOutBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 163
+        Height = 28
+        Top = 76
+        Width = 28
+        BorderSpacing.Top = 16
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = ColInBtnClick
+        Spacing = 0
+        TabOrder = 4
+      end
+      object ColOutBtn: TBitBtn
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = ColInBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 163
+        Height = 28
+        Top = 108
+        Width = 28
+        BorderSpacing.Top = 4
+        Enabled = False
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = ColOutBtnClick
+        Spacing = 0
+        TabOrder = 5
+      end
+      object SliceBtnIn: TBitBtn
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = ColOutBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 163
+        Height = 28
+        Top = 152
+        Width = 28
+        BorderSpacing.Top = 16
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = SliceBtnInClick
+        Spacing = 0
+        TabOrder = 7
+      end
+      object SliceBtnOut: TBitBtn
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = SliceBtnIn
+        AnchorSideTop.Side = asrBottom
+        Left = 163
+        Height = 28
+        Top = 184
+        Width = 28
+        BorderSpacing.Top = 4
+        Enabled = False
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = SliceBtnOutClick
+        Spacing = 0
+        TabOrder = 8
+      end
+      object FreqInBtn: TBitBtn
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = SliceBtnOut
+        AnchorSideTop.Side = asrBottom
+        Left = 163
+        Height = 28
+        Top = 228
+        Width = 28
+        BorderSpacing.Top = 16
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = FreqInBtnClick
+        Spacing = 0
+        TabOrder = 10
+      end
+      object FreqOutBtn: TBitBtn
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = FreqInBtn
+        AnchorSideTop.Side = asrBottom
+        AnchorSideBottom.Side = asrBottom
+        Left = 163
+        Height = 28
+        Top = 260
+        Width = 28
+        BorderSpacing.Top = 4
+        Enabled = False
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = FreqOutBtnClick
+        Spacing = 0
+        TabOrder = 11
+      end
+      object RowVarEdit: TEdit
+        AnchorSideLeft.Control = RowInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = Page1
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = RowOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 199
+        Height = 23
+        Top = 25
+        Width = 156
+        Anchors = [akLeft, akRight, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        ReadOnly = True
+        TabOrder = 3
+        Text = 'RowVarEdit'
+      end
+      object ColVarEdit: TEdit
+        AnchorSideLeft.Control = ColInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = Page1
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = ColOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 199
+        Height = 23
+        Top = 101
+        Width = 156
+        Anchors = [akLeft, akRight, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        ReadOnly = True
+        TabOrder = 6
+        Text = 'ColVarEdit'
+      end
+      object SliceVarEdit: TEdit
+        AnchorSideLeft.Control = SliceBtnIn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = Page1
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = SliceBtnOut
+        AnchorSideBottom.Side = asrBottom
+        Left = 199
+        Height = 23
+        Top = 177
+        Width = 156
+        Anchors = [akLeft, akRight, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        ReadOnly = True
+        TabOrder = 9
+        Text = 'SliceVarEdit'
+      end
+      object FreqVarEdit: TEdit
+        AnchorSideLeft.Control = FreqInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = Page1
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = FreqOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 199
+        Height = 23
+        Top = 253
+        Width = 156
+        Anchors = [akLeft, akRight, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        ReadOnly = True
+        TabOrder = 12
+        Text = 'FreqVarEdit'
+      end
+    end
+    object Page2: TPage
+      object Label1: TLabel
+        AnchorSideLeft.Control = Page2
+        AnchorSideTop.Control = NRowsEdit
+        AnchorSideTop.Side = asrCenter
+        Left = 0
+        Height = 15
+        Top = 4
+        Width = 67
+        Caption = 'No. of Rows:'
+        ParentColor = False
+      end
+      object Label2: TLabel
+        AnchorSideLeft.Control = NRowsEdit
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = Label1
+        AnchorSideTop.Side = asrCenter
+        Left = 134
+        Height = 15
+        Top = 4
+        Width = 65
+        BorderSpacing.Left = 16
+        Caption = 'No. of Cols.:'
+        ParentColor = False
+      end
+      object Label7: TLabel
+        AnchorSideLeft.Control = NColsEdit
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = Label2
+        AnchorSideTop.Side = asrCenter
+        Left = 270
+        Height = 15
+        Top = 4
+        Width = 68
+        BorderSpacing.Left = 16
+        Caption = 'No. of Slices:'
+        ParentColor = False
+      end
+      object NRowsEdit: TEdit
+        AnchorSideLeft.Control = Label1
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = Page2
+        Left = 75
+        Height = 23
+        Top = 0
+        Width = 43
+        Alignment = taRightJustify
+        BorderSpacing.Left = 8
+        OnKeyPress = NRowsEditKeyPress
+        TabOrder = 0
+        Text = 'NRowsEdit'
+      end
+      object NColsEdit: TEdit
+        AnchorSideLeft.Control = Label2
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = Page2
+        Left = 207
+        Height = 23
+        Top = 0
+        Width = 47
+        Alignment = taRightJustify
+        BorderSpacing.Left = 8
+        OnKeyPress = NColsEditKeyPress
+        TabOrder = 1
+        Text = 'NColsEdit'
+      end
+      object Grid: TStringGrid
+        AnchorSideLeft.Control = Page2
+        AnchorSideTop.Control = NRowsEdit
+        AnchorSideTop.Side = asrBottom
+        AnchorSideRight.Control = Page2
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = Page2
+        AnchorSideBottom.Side = asrBottom
+        Left = 0
+        Height = 339
+        Top = 31
+        Width = 444
+        Anchors = [akTop, akLeft, akRight, akBottom]
+        BorderSpacing.Top = 8
+        ColCount = 2
+        Options = [goFixedVertLine, goFixedHorzLine, goVertLine, goHorzLine, goRangeSelect, goEditing, goTabs, goSmoothScroll]
+        RowCount = 2
+        TabOrder = 2
+      end
+      object NslicesEdit: TEdit
+        AnchorSideLeft.Control = Label7
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = Page2
+        Left = 346
+        Height = 23
+        Top = 0
+        Width = 39
+        Alignment = taRightJustify
+        BorderSpacing.Left = 8
+        OnKeyPress = NslicesEditKeyPress
+        TabOrder = 3
+        Text = 'NslicesEdit'
+      end
+    end
+  end
+  object FileFromGrp: TRadioGroup
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 51
+    Top = 8
+    Width = 354
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'Enter Data From:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.HorizontalSpacing = 16
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 2
+    ClientHeight = 31
+    ClientWidth = 350
+    Columns = 2
+    Items.Strings = (
+      'File Data in the Main Grid'
+      'Data Entered on this Form'
+    )
+    OnClick = FileFromGrpClick
+    TabOrder = 0
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 383
+    Width = 371
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Bevel2: TBevel
+    Left = 1
+    Height = 12
+    Top = 434
+    Width = 10
+    Shape = bsSpacer
+  end
+end

applications/lazstats/source/forms/analysis/cross-classification/loglinscreenunit.lfm

@@ -0,0 +1,449 @@
+object LogLinScreenFrm: TLogLinScreenFrm
+  Left = 456
+  Height = 584
+  Top = 135
+  Width = 402
+  AutoSize = True
+  Caption = 'Cross-Classification Log Linear Screen'
+  ClientHeight = 584
+  ClientWidth = 402
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = CountVarChk
+    AnchorSideTop.Side = asrBottom
+    Left = 8
+    Height = 15
+    Top = 39
+    Width = 337
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 12
+    Caption = '1.  Select the variables of the Grid that define your classifications'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Panel1
+    AnchorSideTop.Side = asrBottom
+    Left = 8
+    Height = 15
+    Top = 208
+    Width = 97
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 12
+    Caption = 'Available Variables'
+    ParentColor = False
+  end
+  object Label3: TLabel
+    AnchorSideLeft.Control = SelectList
+    AnchorSideTop.Control = Label2
+    Left = 232
+    Height = 15
+    Top = 208
+    Width = 44
+    Caption = 'Selected'
+    ParentColor = False
+  end
+  object CountVarChk: TCheckBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 19
+    Top = 8
+    Width = 247
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Last Variable Selected is a Frequency Count'
+    TabOrder = 0
+  end
+  object Step2Btn: TButton
+    AnchorSideLeft.Control = Label10
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Label10
+    AnchorSideTop.Side = asrCenter
+    Left = 234
+    Height = 25
+    Top = 55
+    Width = 52
+    AutoSize = True
+    BorderSpacing.Left = 16
+    Caption = 'Click'
+    OnClick = Step2BtnClick
+    TabOrder = 1
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label2
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = AllBtn
+    AnchorSideBottom.Control = GroupBox1
+    Left = 8
+    Height = 230
+    Top = 225
+    Width = 162
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Constraints.MinHeight = 220
+    ItemHeight = 0
+    MultiSelect = True
+    TabOrder = 3
+  end
+  object InBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = VarList
+    Left = 187
+    Height = 28
+    Top = 225
+    Width = 28
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = InBtnClick
+    Spacing = 0
+    TabOrder = 4
+  end
+  object OutBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = InBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 187
+    Height = 28
+    Top = 257
+    Width = 28
+    BorderSpacing.Top = 4
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = OutBtnClick
+    Spacing = 0
+    TabOrder = 5
+  end
+  object AllBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = OutBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 178
+    Height = 25
+    Top = 289
+    Width = 46
+    AutoSize = True
+    BorderSpacing.Top = 4
+    Caption = 'ALL'
+    OnClick = AllBtnClick
+    Spacing = 0
+    TabOrder = 6
+  end
+  object SelectList: TListBox
+    AnchorSideLeft.Control = AllBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = VarList
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = VarList
+    AnchorSideBottom.Side = asrBottom
+    Left = 232
+    Height = 230
+    Top = 225
+    Width = 162
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    ItemHeight = 0
+    TabOrder = 7
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label11
+    AnchorSideTop.Side = asrBottom
+    Left = 24
+    Height = 85
+    Top = 111
+    Width = 244
+    AutoSize = True
+    BorderSpacing.Left = 24
+    BevelOuter = bvNone
+    ClientHeight = 85
+    ClientWidth = 244
+    TabOrder = 2
+    object Label7: TLabel
+      AnchorSideTop.Control = VarNoEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = VarNoEdit
+      Left = 137
+      Height = 15
+      Top = 12
+      Width = 44
+      Anchors = [akTop, akRight]
+      BorderSpacing.Right = 8
+      Caption = 'Variable:'
+      ParentColor = False
+    end
+    object Label8: TLabel
+      AnchorSideTop.Control = MinEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = MinEdit
+      Left = 98
+      Height = 15
+      Top = 39
+      Width = 87
+      Anchors = [akTop, akRight]
+      BorderSpacing.Right = 4
+      Caption = 'Minimum Value:'
+      ParentColor = False
+    end
+    object Label9: TLabel
+      AnchorSideTop.Control = MaxEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = MaxEdit
+      Left = 92
+      Height = 15
+      Top = 66
+      Width = 89
+      Anchors = [akTop, akRight]
+      BorderSpacing.Right = 8
+      Caption = 'Maximum Value:'
+      ParentColor = False
+    end
+    object ScrollBar1: TScrollBar
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = VarNoEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = Label7
+      Left = 0
+      Height = 17
+      Top = 11
+      Width = 121
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Right = 16
+      PageSize = 0
+      TabOrder = 0
+      OnChange = ScrollBar1Change
+    end
+    object VarNoEdit: TEdit
+      AnchorSideTop.Control = Panel1
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 189
+      Height = 23
+      Top = 8
+      Width = 55
+      Alignment = taRightJustify
+      Anchors = [akTop, akRight]
+      BorderSpacing.Top = 8
+      TabOrder = 1
+      Text = 'VarNoEdit'
+    end
+    object MinEdit: TEdit
+      AnchorSideLeft.Control = VarNoEdit
+      AnchorSideTop.Control = VarNoEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 189
+      Height = 23
+      Top = 35
+      Width = 55
+      Alignment = taRightJustify
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Top = 4
+      OnKeyPress = MinEditKeyPress
+      TabOrder = 2
+      Text = 'MinEdit'
+    end
+    object MaxEdit: TEdit
+      AnchorSideLeft.Control = VarNoEdit
+      AnchorSideTop.Control = MinEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 189
+      Height = 23
+      Top = 62
+      Width = 55
+      Alignment = taRightJustify
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Top = 4
+      OnKeyPress = MaxEditKeyPress
+      TabOrder = 3
+      Text = 'MaxEdit'
+    end
+  end
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 72
+    Top = 463
+    Width = 241
+    Anchors = [akLeft, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    Caption = 'Options'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 52
+    ClientWidth = 237
+    TabOrder = 8
+    object MarginsChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 213
+      Caption = 'Print Marginal Totals'
+      TabOrder = 0
+    end
+    object GenlModelChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 27
+      Width = 213
+      Caption = 'Print General Linear Modle Estimates'
+      TabOrder = 1
+    end
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = CancelBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 101
+    Height = 25
+    Top = 551
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 10
+  end
+  object CancelBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 167
+    Height = 25
+    Top = 551
+    Width = 62
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Cancel'
+    ModalResult = 2
+    OnClick = CancelBtnClick
+    TabOrder = 11
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = ReturnBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 241
+    Height = 25
+    Top = 551
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 12
+  end
+  object ReturnBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 329
+    Height = 25
+    Top = 551
+    Width = 61
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Return'
+    ModalResult = 1
+    OnClick = ReturnBtnClick
+    TabOrder = 13
+  end
+  object HelpBtn: TButton
+    Tag = 131
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 38
+    Height = 25
+    Top = 551
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 9
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = ReturnBtn
+    Left = 0
+    Height = 8
+    Top = 535
+    Width = 402
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Label10: TLabel
+    AnchorSideLeft.Control = Label1
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    Left = 8
+    Height = 15
+    Top = 60
+    Width = 210
+    BorderSpacing.Top = 6
+    Caption = '2. Click here when variables are selected'
+    ParentColor = False
+  end
+  object Label11: TLabel
+    AnchorSideTop.Control = Label10
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 8
+    Height = 30
+    Top = 81
+    Width = 386
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Top = 6
+    BorderSpacing.Right = 8
+    Caption = '3.  For each variable complete the specifications below. Press the ENTER key following each entry.'
+    ParentColor = False
+    WordWrap = True
+  end
+end

applications/lazstats/source/forms/analysis/cross-classification/twowayloglinunit.lfm

@@ -0,0 +1,435 @@
+object TwoWayLogLinFrm: TTwoWayLogLinFrm
+  Left = 494
+  Height = 352
+  Top = 237
+  Width = 425
+  AutoSize = True
+  Caption = 'Log Linear Analysis of a 2x2 Table'
+  ClientHeight = 352
+  ClientWidth = 425
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object FileFromGrp: TRadioGroup
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 51
+    Top = 8
+    Width = 354
+    AutoFill = False
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Enter Data From:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.HorizontalSpacing = 16
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 2
+    ClientHeight = 31
+    ClientWidth = 350
+    Columns = 2
+    Items.Strings = (
+      'File Data in the Main Grid'
+      'Data Entered on this Form'
+    )
+    OnClick = FileFromGrpClick
+    TabOrder = 0
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 216
+    Height = 25
+    Top = 319
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 3
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 278
+    Height = 25
+    Top = 319
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 4
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 362
+    Height = 25
+    Top = 319
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 5
+  end
+  object HelpBtn: TButton
+    Tag = 154
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 157
+    Height = 25
+    Top = 319
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 2
+  end
+  object Notebook1: TNotebook
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = FileFromGrp
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 236
+    Top = 67
+    Width = 409
+    PageIndex = 0
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    TabOrder = 1
+    object Page1: TPage
+      object Label1: TLabel
+        AnchorSideLeft.Control = RowVarEdit
+        AnchorSideBottom.Control = RowVarEdit
+        Left = 226
+        Height = 15
+        Top = 16
+        Width = 67
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Row Variable'
+        ParentColor = False
+      end
+      object Label2: TLabel
+        AnchorSideLeft.Control = ColVarEdit
+        AnchorSideBottom.Control = ColVarEdit
+        Left = 226
+        Height = 15
+        Top = 90
+        Width = 87
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Column Variable'
+        ParentColor = False
+      end
+      object Label3: TLabel
+        AnchorSideLeft.Control = FreqVarEdit
+        AnchorSideBottom.Control = FreqVarEdit
+        Left = 226
+        Height = 15
+        Top = 176
+        Width = 99
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Frequency Variable'
+        ParentColor = False
+      end
+      object VarList: TListBox
+        AnchorSideLeft.Control = Page1
+        AnchorSideTop.Control = Page1
+        AnchorSideRight.Control = RowInBtn
+        AnchorSideBottom.Control = Page1
+        AnchorSideBottom.Side = asrBottom
+        Left = 0
+        Height = 236
+        Top = 0
+        Width = 182
+        Anchors = [akTop, akLeft, akRight, akBottom]
+        BorderSpacing.Right = 8
+        ItemHeight = 0
+        OnSelectionChange = VarListSelectionChange
+        TabOrder = 0
+      end
+      object RowInBtn: TBitBtn
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = VarList
+        Left = 190
+        Height = 28
+        Top = 8
+        Width = 28
+        BorderSpacing.Top = 8
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = RowInBtnClick
+        Spacing = 0
+        TabOrder = 1
+      end
+      object RowOutBtn: TBitBtn
+        AnchorSideLeft.Control = RowInBtn
+        AnchorSideTop.Control = RowInBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 190
+        Height = 28
+        Top = 40
+        Width = 28
+        BorderSpacing.Top = 4
+        Enabled = False
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = RowOutBtnClick
+        Spacing = 0
+        TabOrder = 2
+      end
+      object ColInBtn: TBitBtn
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideTop.Control = Label2
+        AnchorSideBottom.Control = ColVarEdit
+        AnchorSideBottom.Side = asrBottom
+        Left = 190
+        Height = 28
+        Top = 90
+        Width = 28
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = ColInBtnClick
+        Spacing = 0
+        TabOrder = 4
+      end
+      object ColOutBtn: TBitBtn
+        AnchorSideLeft.Control = ColInBtn
+        AnchorSideTop.Control = ColInBtn
+        AnchorSideTop.Side = asrBottom
+        AnchorSideBottom.Side = asrBottom
+        Left = 190
+        Height = 28
+        Top = 122
+        Width = 28
+        BorderSpacing.Top = 4
+        Enabled = False
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = ColOutBtnClick
+        Spacing = 0
+        TabOrder = 5
+      end
+      object FreqInBtn: TBitBtn
+        AnchorSideLeft.Control = Page1
+        AnchorSideLeft.Side = asrCenter
+        AnchorSideBottom.Control = FreqOutBtn
+        Left = 190
+        Height = 28
+        Top = 168
+        Width = 28
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 4
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = FreqInBtnClick
+        Spacing = 0
+        TabOrder = 7
+      end
+      object FreqOutBtn: TBitBtn
+        AnchorSideLeft.Control = FreqInBtn
+        AnchorSideBottom.Control = VarList
+        AnchorSideBottom.Side = asrBottom
+        Left = 190
+        Height = 28
+        Top = 200
+        Width = 28
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 8
+        Enabled = False
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = FreqOutBtnClick
+        Spacing = 0
+        TabOrder = 8
+      end
+      object RowVarEdit: TEdit
+        AnchorSideLeft.Control = RowInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = Page1
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = RowOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 226
+        Height = 23
+        Top = 33
+        Width = 183
+        Anchors = [akLeft, akRight, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        ReadOnly = True
+        TabOrder = 3
+        Text = 'RowVarEdit'
+      end
+      object ColVarEdit: TEdit
+        AnchorSideLeft.Control = RowInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = VarList
+        AnchorSideTop.Side = asrCenter
+        AnchorSideRight.Control = Page1
+        AnchorSideRight.Side = asrBottom
+        Left = 226
+        Height = 23
+        Top = 107
+        Width = 183
+        Anchors = [akTop, akLeft, akRight]
+        BorderSpacing.Left = 8
+        ReadOnly = True
+        TabOrder = 6
+        Text = 'ColVarEdit'
+      end
+      object FreqVarEdit: TEdit
+        AnchorSideLeft.Control = FreqInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = Page1
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = FreqOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 226
+        Height = 23
+        Top = 193
+        Width = 183
+        Anchors = [akLeft, akRight, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        ReadOnly = True
+        TabOrder = 9
+        Text = 'FreqVarEdit'
+      end
+    end
+    object Page2: TPage
+      object NoRowsLabel: TLabel
+        AnchorSideLeft.Control = Page2
+        AnchorSideTop.Control = NoRowsEdit
+        AnchorSideTop.Side = asrCenter
+        Left = 0
+        Height = 15
+        Top = 4
+        Width = 67
+        Caption = 'No. of Rows:'
+        ParentColor = False
+      end
+      object NoColsLabel: TLabel
+        AnchorSideLeft.Control = NoRowsEdit
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = NoColsEdit
+        AnchorSideTop.Side = asrCenter
+        Left = 138
+        Height = 15
+        Top = 4
+        Width = 87
+        BorderSpacing.Left = 24
+        BorderSpacing.Right = 8
+        Caption = 'No. of Columns:'
+        ParentColor = False
+      end
+      object NoRowsEdit: TEdit
+        AnchorSideLeft.Control = NoRowsLabel
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = Page2
+        Left = 75
+        Height = 23
+        Top = 0
+        Width = 39
+        Alignment = taRightJustify
+        BorderSpacing.Left = 8
+        OnKeyPress = NoRowsEditKeyPress
+        TabOrder = 0
+        Text = 'NoRowsEdit'
+      end
+      object NoColsEdit: TEdit
+        AnchorSideLeft.Control = NoColsLabel
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideTop.Control = Page2
+        AnchorSideRight.Control = Page2
+        AnchorSideRight.Side = asrBottom
+        Left = 233
+        Height = 23
+        Top = 0
+        Width = 46
+        Alignment = taRightJustify
+        BorderSpacing.Left = 8
+        OnKeyPress = NoColsEditKeyPress
+        TabOrder = 1
+        Text = 'Edit1'
+      end
+      object Grid: TStringGrid
+        AnchorSideLeft.Control = Page2
+        AnchorSideTop.Control = NoRowsEdit
+        AnchorSideTop.Side = asrBottom
+        AnchorSideRight.Control = Page2
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = Page2
+        AnchorSideBottom.Side = asrBottom
+        Left = 0
+        Height = 235
+        Top = 31
+        Width = 373
+        Anchors = [akTop, akLeft, akRight, akBottom]
+        BorderSpacing.Top = 8
+        ColCount = 2
+        Options = [goFixedVertLine, goFixedHorzLine, goVertLine, goHorzLine, goRangeSelect, goColSizing, goEditing, goTabs, goThumbTracking, goSmoothScroll]
+        RowCount = 2
+        TabOrder = 2
+      end
+    end
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 303
+    Width = 425
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Bevel2: TBevel
+    Left = 3
+    Height = 14
+    Top = 336
+    Width = 18
+    Shape = bsSpacer
+  end
+end

applications/lazstats/source/forms/analysis/cross-classification/twowayloglinunit.pas

@@ -0,0 +1,886 @@
+unit TwoWayLogLinUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  ExtCtrls, StdCtrls, Buttons, Grids,
+  OutputUnit, MainUnit, Globals, DataProcs, ContextHelpUnit;
+
+type
+
+  { TTwoWayLogLinFrm }
+
+  TTwoWayLogLinFrm = class(TForm)
+    Bevel1: TBevel;
+    Bevel2: TBevel;
+    HelpBtn: TButton;
+    Notebook1: TNotebook;
+    Page1: TPage;
+    Page2: TPage;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    CloseBtn: TButton;
+    RowInBtn: TBitBtn;
+    RowOutBtn: TBitBtn;
+    ColInBtn: TBitBtn;
+    ColOutBtn: TBitBtn;
+    FreqInBtn: TBitBtn;
+    FreqOutBtn: TBitBtn;
+    NoRowsEdit: TEdit;
+    NoColsEdit: TEdit;
+    NoRowsLabel: TLabel;
+    NoColsLabel: TLabel;
+    RowVarEdit: TEdit;
+    ColVarEdit: TEdit;
+    FreqVarEdit: TEdit;
+    FileFromGrp: TRadioGroup;
+    Label1: TLabel;
+    Label2: TLabel;
+    Label3: TLabel;
+    Grid: TStringGrid;
+    VarList: TListBox;
+    procedure ColInBtnClick(Sender: TObject);
+    procedure ColOutBtnClick(Sender: TObject);
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FileFromGrpClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure FreqInBtnClick(Sender: TObject);
+    procedure FreqOutBtnClick(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure NoColsEditKeyPress(Sender: TObject; var Key: char);
+    procedure NoRowsEditKeyPress(Sender: TObject; var Key: char);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure RowInBtnClick(Sender: TObject);
+    procedure RowOutBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    procedure UpdateBtnStates;
+
+    procedure PrintTable(Nrows, Ncols: integer; const Data: DblDyneMat;
+      const RowMarg, ColMarg: DblDyneVec; Total: double; AReport: TStrings);
+    procedure Iterate(Nrows, Ncols: integer;
+      const Data: DblDyneMat; const RowMarg, ColMarg: DblDyneVec;
+      var Total: double;
+      const Expected: DblDyneMat; const NewRowMarg, NewColMarg: DblDyneVec;
+      var NewTotal: double);
+    procedure PrintLamdas(Nrows, Ncols : integer; const CellLambdas: DblDyneCube;
+      mu: double; AReport: TStrings);
+
+  public
+    { public declarations }
+  end; 
+
+var
+  TwoWayLogLinFrm: TTwoWayLogLinFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TTwoWayLogLinFrm }
+
+procedure TTwoWayLogLinFrm.ResetBtnClick(Sender: TObject);
+VAR i, j : integer;
+begin
+     for i := 0 to Grid.RowCount - 1 do
+         for j := 0 to Grid.ColCount - 1 do
+             Grid.Cells[j,i] := '';
+     Grid.ColCount := 3;
+     Grid.RowCount := 2;
+     Grid.Cells[0,0] := 'ROW';
+     Grid.Cells[1,0] := 'COL';
+     Grid.Cells[2,0] := 'FREQ';
+     VarList.Clear;
+     for i := 1 to NoVariables do
+         VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+     RowVarEdit.Text := '';
+     ColVarEdit.Text := '';
+     FreqVarEdit.Text := '';
+     NoRowsEdit.Text := '';
+     NoColsEdit.Text := '';
+     FileFromGrp.ItemIndex := -1;
+     Notebook1.Hide;
+     {
+     VarList.Visible := false;
+     RowInBtn.Enabled := false;
+     RowOutBtn.Enabled := false;
+     ColInBtn.Enabled := false;
+     ColOutBtn.Enabled := false;
+     FreqInBtn.Enabled := false;
+     FreqOutBtn.Enabled := false;
+     Label1.Visible := false;
+     Label2.Visible := false;
+     Label3.Visible := false;
+     RowVarEdit.Visible := false;
+     ColVarEdit.Visible := false;
+     FreqVarEdit.Visible := false;
+//     Memo1.Visible := false;
+     NoRowsLabel.Visible := false;
+     NoColsLabel.Visible := false;
+     NoRowsEdit.Visible := false;
+     NoColsEdit.Visible := false;
+     Grid.Visible := false;
+     }
+end;
+
+procedure TTwoWayLogLinFrm.RowInBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if (index > -1) and (RowVarEdit.Text = '') then
+  begin
+    RowVarEdit.Text := VarList.Items[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TTwoWayLogLinFrm.RowOutBtnClick(Sender: TObject);
+begin
+  if RowVarEdit.Text <> '' then
+  begin
+    VarList.Items.Add(RowVarEdit.Text);
+    RowVarEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TTwoWayLogLinFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TTwoWayLogLinFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if OutputFrm = nil then Application.CreateForm(TOutputFrm, OutputFrm);
+end;
+
+procedure TTwoWayLogLinFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(Self);
+end;
+
+procedure TTwoWayLogLinFrm.FreqInBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if (index > -1) and (FreqVarEdit.Text = '') then
+  begin
+    FreqVarEdit.Text := VarList.Items[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TTwoWayLogLinFrm.FreqOutBtnClick(Sender: TObject);
+begin
+  if FreqVarEdit.Text <> '' then
+  begin
+    VarList.Items.Add(FreqVarEdit.Text);
+    FreqVarEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TTwoWayLogLinFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).Tag);
+end;
+
+procedure TTwoWayLogLinFrm.NoColsEditKeyPress(Sender: TObject; var Key: char);
+var
+   i, j, row : integer;
+   Ncols, Nrows : integer;
+
+begin
+     if ord(Key) = 13 then
+     begin
+          Nrows := StrToInt(NoRowsEdit.Text);
+          Ncols := StrToInt(NoColsEdit.Text);
+          Grid.RowCount := (Nrows * Ncols) + 1;
+          // setup row and column values in the grid
+          row := 1;
+          for j := 1 to Ncols do
+          begin
+               for i := 1 to Nrows do
+               begin
+                    Grid.Cells[0,row] := IntToStr(i);
+                    Grid.Cells[1,row] := IntToStr(j);
+                    row := row + 1;
+               end;
+          end;
+          Grid.SetFocus;
+     end;
+end;
+
+procedure TTwoWayLogLinFrm.NoRowsEditKeyPress(Sender: TObject; var Key: char);
+begin
+     if ord(Key) = 13 then NoColsEdit.SetFocus;
+end;
+
+procedure TTwoWayLogLinFrm.ComputeBtnClick(Sender: TObject);
+var
+   Data : DblDyneMat;
+   NewData : DblDyneMat;
+   Prop : DblDyneMat;
+   LogData : DblDyneMat;
+   Expected : DblDyneMat;
+   i, j, k : integer;
+   RowMarg : DblDyneVec;
+   NewRowMarg : DblDyneVec;
+   RowLogs : DblDyneVec;
+   ColMarg : DblDyneVec;
+   NewColMarg : DblDyneVec;
+   ColLogs : DblDyneVec;
+   CellLambdas : DblDyneCube;
+   Total : double;
+   NewTotal : double;
+   TotalLogs : double;
+   mu : double;
+   row, col : integer;
+   ModelTotal : double;
+   astr : string;
+   Ysqr : double;
+   DF : integer;
+   chisqr: double;
+   odds : double;
+   Nrows, Ncols : integer;
+   RowCol, ColCol, Fcol : integer;
+   GridPos : IntDyneVec;
+   value : integer;
+   Fx : double;
+   lReport: TStrings;
+
+begin
+  Total := 0.0;
+  TotalLogs := 0.0;
+  Nrows := 0;
+  Ncols := 0;
+
+  if FileFromGrp.ItemIndex = 0 then // mainfrm input
+  begin
+      SetLength(GridPos,3);
+      for i := 1 to NoVariables do
+      begin
+           if RowVarEdit.Text = OS3MainFrm.DataGrid.Cells[i,0] then GridPos[0] := i;
+           if ColVarEdit.Text = OS3MainFrm.DataGrid.Cells[i,0] then GridPos[1] := i;
+           if FreqVarEdit.Text = OS3MainFrm.DataGrid.Cells[i,0] then GridPos[2] := i;
+      end;
+      // get no. of rows and columns
+      for i := 1 to OS3MainFrm.DataGrid.RowCount - 1 do
+      begin
+           value := StrToInt(OS3MainFrm.DataGrid.Cells[GridPos[0],i]);
+           if value > Nrows then Nrows := value;
+           value := StrToInt(OS3MainFrm.DataGrid.Cells[GridPos[1],i]);
+           if value > Ncols then Ncols := value;
+      end;
+
+      // Get data
+      SetLength(Data,Nrows+1,Ncols+1);
+      SetLength(CellLambdas,Nrows+1,Ncols+1,4);
+      SetLength(RowMarg,Nrows+1);
+      SetLength(RowLogs,Nrows+1);
+      SetLength(ColMarg,Ncols+1);
+      SetLength(ColLogs,Ncols+1);
+      SetLength(Prop,Nrows+1,Ncols+1);
+      SetLength(LogData,Nrows+1,Ncols+1);
+      SetLength(Expected,Nrows+1,Ncols+1);
+      SetLength(NewData,Nrows+1,Ncols+1);
+      SetLength(NewRowMarg,Nrows+1);
+      SetLength(NewColMarg,Ncols+1);
+
+      for i := 1 to Nrows do
+          for j := 1 to Ncols do
+              Data[i,j] := 0.0;
+      rowcol := GridPos[0];
+      colcol := GridPos[1];
+      Fcol := GridPos[2];
+      for i := 1 to OS3MainFrm.DataGrid.RowCount - 1 do
+      begin
+           if Not GoodRecord(i, 3, GridPos) then continue;
+           row := StrToInt(OS3MainFrm.DataGrid.Cells[rowcol,i]);
+           col := StrToInt(OS3MainFrm.DataGrid.Cells[colcol,i]);
+           Fx := StrToInt(OS3MainFrm.DataGrid.Cells[Fcol,i]);
+           Data[row,col] := Data[row,col] + Fx;
+           Total := Total + Fx;
+      end;
+      GridPos := nil;
+  end;
+
+  if FileFromGrp.ItemIndex = 1 then // form data
+  begin
+      Nrows := StrToInt(NoRowsEdit.Text);
+      Ncols := StrToInt(NoColsEdit.Text);
+      SetLength(Data,Nrows+1,Ncols+1);
+      SetLength(CellLambdas,Nrows+1,Ncols+1,4);
+      SetLength(RowMarg,Nrows+1);
+      SetLength(RowLogs,Nrows+1);
+      SetLength(ColMarg,Ncols+1);
+      SetLength(ColLogs,Ncols+1);
+      SetLength(Prop,Nrows+1,Ncols+1);
+      SetLength(LogData,Nrows+1,Ncols+1);
+      SetLength(Expected,Nrows+1,Ncols+1);
+      SetLength(NewData,Nrows+1,Ncols+1);
+      SetLength(NewRowMarg,Nrows+1);
+      SetLength(NewColMarg,Ncols+1);
+  end;
+
+  for i := 1 to Nrows do
+      for j := 1 to Ncols do
+          for k := 1 to 3 do CellLambdas[i,j,k] := 0.0;
+
+  for i := 1 to Nrows do
+  begin
+      RowMarg[i] := 0.0;
+      RowLogs[i] := 0.0;
+  end;
+
+  for j := 1 to Ncols do
+  begin
+      ColMarg[j] := 0.0;
+      ColLogs[j] := 0.0;
+  end;
+
+  if FileFromGrp.ItemIndex = 1 then // get data from grid
+  begin
+      for i := 1 to (Nrows * Ncols) do
+      begin
+           row := StrToInt(Grid.Cells[0,i]);
+           col := StrToInt(Grid.Cells[1,i]);
+           Data[row,col] := StrToFloat(Grid.Cells[2,i]);
+           Total := Total + Data[row,col];
+      end;
+  end;
+
+  for i := 1 to Nrows do
+  begin
+      for j := 1 to Ncols do
+      begin
+           RowMarg[i] := RowMarg[i] + Data[i,j];
+           ColMarg[j] := ColMarg[j] + Data[i,j];
+           Prop[i,j] := Prop[i,j] / Total;
+           LogData[i,j] := ln(Data[i,j]);
+      end;
+  end;
+
+  // report cross-products odds and log odds ratios
+  lReport := TStringList.Create;
+  try
+    lReport.Add('ANALYSES FOR AN I BY J CLASSIFICATION TABLE');
+    lReport.Add('');
+    lReport.Add('Reference: G.J.G. Upton, The Analysis of Cross-tabulated Data, 1980');
+    lReport.Add('');
+    if (Nrows = 2) and (Ncols = 2) then
+    begin
+      odds := (Data[1,1] * Data[2,2]) / (Data[1,2] * Data[2,1]);
+      lReport.Add('Cross-Products Odds Ratio:            %6.3f', [odds]);
+      lReport.Add('Log odds of the cross-products ratio: %6.3f', [ln(odds)]);
+      lReport.Add('');
+    end;
+    for i := 1 to Nrows do
+    begin
+      for j := 1 to Ncols do
+      begin
+           RowLogs[i] := RowLogs[i] + LogData[i,j];
+           ColLogs[j] := ColLogs[j] + LogData[i,j];
+           TotalLogs := TotalLogs + LogData[i,j];
+      end;
+    end;
+
+    for i := 1 to Nrows do RowLogs[i] := RowLogs[i] / Ncols;
+    for j := 1 to Ncols do ColLogs[j] := ColLogs[j] / Nrows;
+    TotalLogs := TotalLogs / (Nrows * Ncols);
+    mu := TotalLogs;
+
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+      begin
+           CellLambdas[i,j,1] := RowLogs[i] - TotalLogs;
+           CellLambdas[i,j,2] := ColLogs[j] - TotalLogs;
+           CellLambdas[i,j,3] := LogData[i,j] - RowLogs[i]  - ColLogs[j] + TotalLogs;
+      end;
+
+    // Get expected values for saturated model
+    for i := 1 to Nrows do
+    begin
+      for j := 1 to Ncols do
+      begin
+           ModelTotal := mu;
+           for k := 1 to 3 do
+                ModelTotal := ModelTotal + CellLambdas[i,j,k];
+           Expected[i,j] := exp(ModelTotal);
+      end;
+    end;
+
+    // Get Y square for saturated model
+    Ysqr := 0.0;
+    for i := 1 to Nrows do
+     for j := 1 to Ncols do
+         Ysqr := Ysqr + Data[i,j] * (ln(Data[i,j]) - ln(Expected[i,j]));
+    Ysqr := 2.0 * Ysqr;
+
+    // write out values for saturated model
+    lReport.Add('Saturated Model Results');
+    lReport.Add('');
+    lReport.Add('Observed Frequencies');
+    PrintTable(Nrows, Ncols, Data, RowMarg, ColMarg, Total, lReport);
+    lReport.Add('Log frequencies, row average and column average of log frequencies');
+    PrintTable(Nrows, Ncols, LogData, RowLogs, ColLogs, TotalLogs, lReport);
+    lReport.Add('Expected Frequencies');
+    PrintTable(Nrows, Ncols, Expected, RowMarg, ColMarg, Total, lReport);
+
+    lReport.Add('Cell Parameters');
+    PrintLamdas(Nrows, Ncols, CellLambdas, mu, lReport);
+
+    lReport.Add('Y squared statistic for model fit: ' + format('%.3f',[Ysqr]) + ' D.F. 0');
+
+    lReport.Add('');
+    lReport.Add('=======================================================================');
+    lReport.Add('');
+
+    // Do the model of independence
+    lReport.Add('Independent Effects Model Results');
+    lReport.Add('');
+
+    lReport.Add('Expected Frequencies');
+    Iterate(Nrows,Ncols, Data, RowMarg, ColMarg, Total, Expected, NewRowMarg, NewColMarg, NewTotal);
+    PrintTable(Nrows, Ncols, Expected, NewRowMarg, NewColMarg, NewTotal, lReport);
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+           LogData[i,j] := ln(Expected[i,j]);
+    for i := 1 to Nrows do RowLogs[i] := 0.0;
+    for j := 1 to Ncols do ColLogs[j] := 0.0;
+    TotalLogs := 0.0;
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+      begin
+           RowLogs[i] := RowLogs[i] + LogData[i,j];
+           ColLogs[j] := ColLogs[j] + LogData[i,j];
+           TotalLogs := TotalLogs + LogData[i,j];
+      end;
+
+    for i := 1 to Nrows do RowLogs[i] := RowLogs[i] / Ncols;
+    for j := 1 to Ncols do ColLogs[j] := ColLogs[j] / Nrows;
+    TotalLogs := TotalLogs / (Nrows * Ncols);
+    mu := TotalLogs;
+
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+      begin
+           CellLambdas[i,j,1] := RowLogs[i] - TotalLogs;
+           CellLambdas[i,j,2] := ColLogs[j] - TotalLogs;
+           CellLambdas[i,j,3] := LogData[i,j] - RowLogs[i]  - ColLogs[j] + TotalLogs;
+      end;
+    lReport.Add('Cell Parameters');
+    PrintLamdas(Nrows, Ncols, CellLambdas, mu, lReport);
+
+    Ysqr := 0.0;
+    for i := 1 to Nrows do
+     for j := 1 to Ncols do
+         Ysqr := Ysqr + Data[i,j] * (ln(Data[i,j]) - ln(Expected[i,j]));
+    Ysqr := 2.0 * Ysqr;
+    lReport.Add('');
+    astr := 'Y squared statistic for model fit: ' + Format('%.3f',[Ysqr]);
+    DF := (NRows - 1) * (NCols - 1);
+    astr := astr + ', D.F. = ' + IntToStr(DF);
+    lReport.Add(astr);
+
+    chisqr := 0.0;
+    for i := 1 to Nrows do
+     for j := 1 to Ncols do
+         chisqr := chisqr + (power((Data[i,j] - Expected[i,j]),2) / Expected[i,j]);
+    lReport.Add('Chi-squared = %.3f with %d D.F.', [chisqr, DF]);
+
+    lReport.Add('');
+    lReport.Add('=======================================================================');
+    lReport.Add('');
+
+    // Do no Column Effects model
+    lReport.Add('No Column Effects Model Results');
+    lReport.Add('');
+    for i := 1 to Nrows do
+     for j := 1 to Ncols do
+         Expected[i,j] := RowMarg[i] / Ncols;
+    for i := 1 to Nrows do NewRowMarg[i] := 0.0;
+    for j := 1 to Ncols do NewColMarg[j] := 0.0;
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+      begin
+           NewRowMarg[i] := NewRowMarg[i] + Expected[i,j];
+           NewColMarg[j] := NewColMarg[j] + Expected[i,j];
+      end;
+    lReport.Add('Expected Frequencies');
+    PrintTable(Nrows, Ncols, Expected, NewRowMarg, NewColMarg, NewTotal, lReport);
+
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+           LogData[i,j] := ln(Expected[i,j]);
+    for i := 1 to Nrows do RowLogs[i] := 0.0;
+    for j := 1 to Ncols do ColLogs[j] := 0.0;
+    TotalLogs := 0.0;
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+      begin
+           RowLogs[i] := RowLogs[i] + LogData[i,j];
+           ColLogs[j] := ColLogs[j] + LogData[i,j];
+           TotalLogs := TotalLogs + LogData[i,j];
+      end;
+
+    for i := 1 to Nrows do RowLogs[i] := RowLogs[i] / Ncols;
+    for j := 1 to Ncols do ColLogs[j] := ColLogs[j] / Nrows;
+    TotalLogs := TotalLogs / (Nrows * Ncols);
+    mu := TotalLogs;
+
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+      begin
+           CellLambdas[i,j,1] := RowLogs[i] - TotalLogs;
+           CellLambdas[i,j,2] := ColLogs[j] - TotalLogs;
+           CellLambdas[i,j,3] := LogData[i,j] - RowLogs[i]  - ColLogs[j] + TotalLogs;
+      end;
+
+    lReport.Add('Cell Parameters');
+    PrintLamdas(Nrows, Ncols, CellLambdas, mu, lReport);
+
+    Ysqr := 0.0;
+    for i := 1 to Nrows do
+     for j := 1 to Ncols do
+         Ysqr := Ysqr + Data[i,j] * (ln(Data[i,j]) - ln(Expected[i,j]));
+    Ysqr := 2.0 * Ysqr;
+    lReport.Add('');
+
+    astr := 'Y squared statistic for model fit: ' + Format('%.3f',[Ysqr]);
+    DF := (Nrows - 1) * Ncols;
+    astr := astr + ', D.F. ' + IntToStr(DF);
+    lReport.Add(astr);
+
+    lReport.Add('');
+    lReport.Add('=======================================================================');
+    lReport.Add('');
+
+    // Do no Row Effects model
+    lReport.Add('No Row Effects Model Results');
+    lReport.Add('');
+    for i := 1 to Nrows do
+     for j := 1 to Ncols do
+         Expected[i,j] := ColMarg[j] / Nrows;
+    for i := 1 to Nrows do  NewRowMarg[i] := 0.0;
+    for j := 1 to Ncols do  NewColMarg[j] := 0.0;
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+      begin
+           NewRowMarg[i] := NewRowMarg[i] + Expected[i,j];
+           NewColMarg[j] := NewColMarg[j] + Expected[i,j];
+      end;
+
+    lReport.Add('Expected Frequencies');
+    PrintTable(Nrows, Ncols, Expected, NewRowMarg, NewColMarg, NewTotal, lReport);
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+           LogData[i,j] := ln(Expected[i,j]);
+    for i := 1 to Nrows do RowLogs[i] := 0.0;
+    for j := 1 to Ncols do ColLogs[j] := 0.0;
+    TotalLogs := 0.0;
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+      begin
+           RowLogs[i] := RowLogs[i] + LogData[i,j];
+           ColLogs[j] := ColLogs[j] + LogData[i,j];
+           TotalLogs := TotalLogs + LogData[i,j];
+      end;
+
+    for i := 1 to Nrows do RowLogs[i] := RowLogs[i] / Ncols;
+    for j := 1 to Ncols do ColLogs[j] := ColLogs[j] / Nrows;
+    TotalLogs := TotalLogs / (Nrows * Ncols);
+    mu := TotalLogs;
+
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+      begin
+           CellLambdas[i,j,1] := RowLogs[i] - TotalLogs;
+           CellLambdas[i,j,2] := ColLogs[j] - TotalLogs;
+           CellLambdas[i,j,3] := LogData[i,j] - RowLogs[i]  - ColLogs[j] + TotalLogs;
+      end;
+
+    lReport.Add('Cell Parameters');
+    PrintLamdas(Nrows, Ncols, CellLambdas, mu, lReport);
+    Ysqr := 0.0;
+    for i := 1 to Nrows do
+     for j := 1 to Ncols do
+         Ysqr := Ysqr + Data[i,j] * (ln(Data[i,j]) - ln(Expected[i,j]));
+    Ysqr := 2.0 * Ysqr;
+    lReport.Add('');
+    astr := 'Y squared statistic for model fit: ' + Format('%.3f', [Ysqr]);
+    DF := (Ncols - 1) * Nrows;
+    astr := astr + ', D.F. ' + IntToStr(DF);
+    lReport.Add(astr);
+
+    lReport.Add('');
+    lReport.Add('=======================================================================');
+    lReport.Add('');
+
+    // Do equiprobability model
+    lReport.Add('Equiprobability Effects Model Results');
+    lReport.Add('');
+    for i := 1 to Nrows do
+     for j := 1 to Ncols do
+         Expected[i,j] := Total / (Nrows * Ncols);
+    for i := 1 to Nrows do NewRowMarg[i] := Total / (Nrows * Ncols);
+    for j := 1 to 2 do NewColMarg[j] := Total / (Nrows * Ncols);
+
+    lReport.Add('Expected Frequencies');
+    PrintTable(Nrows, Ncols, Expected, NewRowMarg, NewColMarg, NewTotal, lReport);
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+           LogData[i,j] := ln(Expected[i,j]);
+    for i := 1 to Nrows do RowLogs[i] := 0.0;
+    for j := 1 to Ncols do ColLogs[j] := 0.0;
+    TotalLogs := 0.0;
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+      begin
+           RowLogs[i] := RowLogs[i] + LogData[i,j];
+           ColLogs[j] := ColLogs[j] + LogData[i,j];
+           TotalLogs := TotalLogs + LogData[i,j];
+      end;
+
+    for i := 1 to Nrows do RowLogs[i] := RowLogs[i] / Ncols;
+    for j := 1 to Ncols do ColLogs[j] := ColLogs[j] / Nrows;
+    TotalLogs := TotalLogs / (Nrows * Ncols);
+    mu := TotalLogs;
+
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+      begin
+           CellLambdas[i,j,1] := RowLogs[i] - TotalLogs;
+           CellLambdas[i,j,2] := ColLogs[j] - TotalLogs;
+           CellLambdas[i,j,3] := LogData[i,j] - RowLogs[i]  - ColLogs[j] + TotalLogs;
+      end;
+
+    lReport.Add('Cell Parameters');
+    PrintLamdas(Nrows, Ncols, CellLambdas, mu, lReport);
+    Ysqr := 0.0;
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+         Ysqr := Ysqr + Data[i,j] * (ln(Data[i,j]) - ln(Expected[i,j]));
+    Ysqr := 2.0 * Ysqr;
+    lReport.Add('');
+    astr := 'Y squared statistic for model fit: ' + format('%.3f',[Ysqr]);
+    DF := Nrows * Ncols - 1;
+    astr := astr + ', D.F. ' + IntToStr(DF);
+    lReport.Add(astr);
+
+    DisplayReport(lReport);
+
+  finally
+    lReport.Free;
+
+    NewColMarg := nil;
+    NewRowMarg := nil;
+    NewData := nil;
+    Expected := nil;
+    LogData := nil;
+    Prop := nil;
+    ColLogs := nil;
+    ColMarg := nil;
+    RowLogs := nil;
+    RowMarg := nil;
+    CellLambdas := nil;
+    Data := nil;
+  end;
+end;
+
+procedure TTwoWayLogLinFrm.FileFromGrpClick(Sender: TObject);
+begin
+  Notebook1.PageIndex := FileFromGrp.ItemIndex;
+  Notebook1.Show;
+end;
+
+procedure TTwoWayLogLinFrm.ColInBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if (index > -1) and (ColVarEdit.Text = '') then
+  begin
+    ColVarEdit.Text := VarList.Items[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TTwoWayLogLinFrm.ColOutBtnClick(Sender: TObject);
+begin
+  if ColVarEdit.Text <> '' then
+  begin
+    VarList.Items.Add(ColVarEdit.Text);
+    ColVarEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TTwoWayLogLinFrm.PrintTable(Nrows, Ncols : integer;
+  const Data: DblDyneMat; const RowMarg, ColMarg: DblDyneVec;
+  Total: double; AReport: TStrings);
+var
+  astr: string;
+  i, j: integer;
+begin
+  astr := 'ROW/COL   ';
+  for j := 1 to Ncols do astr := astr + Format('   %3d    ', [j]);
+  astr := astr + '  TOTAL';
+  AReport. Add(astr);
+
+  for i := 1 to Nrows do
+  begin
+    astr := Format('   %3d    ', [i]);
+    for j := 1 to Ncols do
+      astr := astr + Format(' %8.2f ', [Data[i,j]]);
+    astr := astr + Format(' %8.2f ', [RowMarg[i]]);
+    AReport.Add(astr);
+  end;
+
+  astr := 'TOTAL     ';
+  for j := 1 to Ncols do astr := astr + Format(' %8.2f ',[ColMarg[j]]);
+  astr := astr + Format(' %8.2f ', [Total]);
+  AReport.Add(astr);
+  AReport.Add('');
+end;
+
+procedure TTwoWayLogLinFrm.Iterate(Nrows, Ncols: integer;
+  const Data: DblDyneMat; const RowMarg, ColMarg: DblDyneVec; var Total: double;
+  const Expected: DblDyneMat; const NewRowMarg, NewColMarg: DblDyneVec; var NewTotal: double);
+Label Step;
+var
+  Aprevious: DblDyneMat;
+  i, j: integer;
+  delta: double;
+  difference: double;
+begin
+  delta := 0.1;
+  difference := 0.0;
+  SetLength(Aprevious, Nrows+1, Ncols+1);
+
+  // initialize expected values
+  for i := 1 to Nrows do
+    for j := 1 to Ncols do
+    begin
+      expected[i,j] := 1.0;
+      Aprevious[i,j] := 1.0;
+    end;
+
+Step:
+  // step 1: initialize new row margins and calculate expected value
+  for i := 1 to Nrows do
+    for j := 1 to Ncols do
+      newrowmarg[i] := newrowmarg[i] + expected[i,j];
+
+  for i := 1 to Nrows do
+    for j := 1 to Ncols do
+      expected[i,j] := (RowMarg[i] / newrowmarg[i]) * expected[i,j];
+
+  // step 2: initialize new col margins and calculate expected values
+  for i := 1 to Nrows do
+    for j := 1 to Ncols do
+      newcolmarg[j] := newcolmarg[j] + expected[i,j];
+
+  for i := 1 to Nrows do
+    for j := 1 to Ncols do
+      expected[i,j] := (ColMarg[j] / newcolmarg[j]) * expected[i,j];
+
+  // step 3: check for change and quit if smaller than delta
+  for i := 1 to Nrows do
+    for j := 1 to Ncols do
+      if abs(APrevious[i,j]-expected[i,j]) > difference then
+        difference := abs(APrevious[i,j]-expected[i,j]);
+
+  if difference < delta then
+  begin
+    newtotal := 0.0;
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+        newtotal := newtotal + expected[i,j];
+    exit;
+  end else
+  begin
+    for i := 1 to Nrows do
+      for j := 1 to Ncols do
+        APrevious[i,j] := expected[i,j];
+    for i := 1 to Nrows do newrowmarg[i] := 0.0;
+    for j := 1 to Ncols do newcolmarg[j] := 0.0;
+    difference := 0.0;
+    goto step;
+  end;
+  Aprevious := nil;
+end;
+
+procedure TTwoWayLogLinFrm.PrintLamdas(Nrows,Ncols: integer;
+  const CellLambdas: DblDyneCube; mu: double; AReport: TStrings);
+var
+  i, j, k: integer;
+  astr: string;
+begin
+  AReport.Add('ROW COL   MU      LAMBDA ROW   LAMBDA COL   LAMBDA ROW x COL');
+
+  for i := 1 to Nrows do
+  begin
+    for j := 1 to Ncols do
+    begin
+      astr := Format('%3d %3d ', [i, j]);
+      astr := astr + Format('%6.3f    ', [mu]);
+      for k := 1 to 3 do
+        astr := astr + format(' %6.3f      ', [CellLambdas[i,j,k]]);
+      AReport.Add(astr);
+    end;
+  end;
+  AReport.Add('');
+end;
+
+procedure TTwoWayLogLinFrm.UpdateBtnStates;
+begin
+  RowInBtn.Enabled := (VarList.ItemIndex > -1) and (RowVarEdit.Text = '');
+  ColInBtn.Enabled := (VarList.ItemIndex > -1) and (ColVarEdit.Text = '');
+  FreqInBtn.Enabled := (VarList.ItemIndex > -1) and (FreqVarEdit.Text = '');
+  RowOutBtn.Enabled := (RowVarEdit.Text <> '');
+  ColOutBtn.Enabled := (ColVarEdit.Text <> '');
+  FreqOutBtn.Enabled := (FreqVarEdit.Text <> '');
+end;
+
+procedure TTwoWayLogLinFrm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+initialization
+  {$I twowayloglinunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/boxplotunit.lfm

@@ -0,0 +1,222 @@
+object BoxPlotFrm: TBoxPlotFrm
+  Left = 440
+  Height = 365
+  Top = 119
+  Width = 361
+  AutoSize = True
+  Caption = 'Box Plot'
+  ClientHeight = 365
+  ClientWidth = 361
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 294
+    Height = 25
+    Top = 332
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 7
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 210
+    Height = 25
+    Top = 332
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 6
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 148
+    Height = 25
+    Top = 332
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 5
+  end
+  object HelpBtn: TButton
+    Tag = 108
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 89
+    Height = 25
+    Top = 332
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 4
+  end
+  object Bevel2: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 316
+    Width = 361
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 15
+    Top = 8
+    Width = 97
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Available Variables'
+    ParentColor = False
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = HorCenterBevel
+    AnchorSideBottom.Control = Bevel2
+    Left = 8
+    Height = 291
+    Top = 25
+    Width = 168
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    Constraints.MinHeight = 200
+    ItemHeight = 0
+    OnClick = VarListClick
+    TabOrder = 0
+  end
+  object HorCenterBevel: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    Left = 176
+    Height = 78
+    Top = 55
+    Width = 8
+    Shape = bsSpacer
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = HorCenterBevel
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Owner
+    Left = 184
+    Height = 15
+    Top = 8
+    Width = 77
+    BorderSpacing.Top = 8
+    Caption = 'Group Variable'
+    ParentColor = False
+  end
+  object GroupEdit: TEdit
+    AnchorSideLeft.Control = HorCenterBevel
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Label2
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 184
+    Height = 23
+    Top = 25
+    Width = 169
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    TabOrder = 1
+    Text = 'GroupEdit'
+  end
+  object Label3: TLabel
+    AnchorSideLeft.Control = MeasEdit
+    AnchorSideBottom.Control = MeasEdit
+    Left = 184
+    Height = 15
+    Top = 142
+    Width = 112
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 2
+    Caption = 'Meaurement Variable'
+    ParentColor = False
+  end
+  object MeasEdit: TEdit
+    AnchorSideLeft.Control = HorCenterBevel
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = VarList
+    AnchorSideTop.Side = asrCenter
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 184
+    Height = 23
+    Top = 159
+    Width = 169
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Right = 8
+    TabOrder = 2
+    Text = 'MeasEdit'
+  end
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = HorCenterBevel
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideBottom.Control = VarList
+    AnchorSideBottom.Side = asrBottom
+    Left = 184
+    Height = 51
+    Top = 265
+    Width = 143
+    Anchors = [akLeft, akBottom]
+    AutoSize = True
+    Caption = 'Options'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ClientHeight = 31
+    ClientWidth = 139
+    TabOrder = 3
+    object ShowChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 115
+      Caption = 'Show Frequencies'
+      TabOrder = 0
+    end
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/boxplotunit.pas

@@ -0,0 +1,721 @@
+// Use file "anova2.laz" for testing
+
+unit BoxPlotUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls, Printers,
+  MainUnit, Globals, DataProcs, OutputUnit, BlankFrmUnit, ContextHelpUnit;
+
+
+type
+
+  { TBoxPlotFrm }
+
+  TBoxPlotFrm = class(TForm)
+    HorCenterBevel: TBevel;
+    Bevel2: TBevel;
+    HelpBtn: TButton;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    CloseBtn: TButton;
+    ShowChk: TCheckBox;
+    GroupBox1: TGroupBox;
+    MeasEdit: TEdit;
+    GroupEdit: TEdit;
+    Label1: TLabel;
+    Label2: TLabel;
+    Label3: TLabel;
+    VarList: TListBox;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    function Percentile(nscrgrps : integer;
+                     pcnt : double;
+                     VAR freq : DblDyneVec;
+                     VAR cumfreq : DblDyneVec;
+                     VAR scores : DblDyneVec) : double;
+    {
+    procedure pBoxPlot(nbars : integer;
+                    max, min : double;
+                    VAR lowqrtl : DblDyneVec;
+                    VAR hiqrtl : DblDyneVec;
+                    VAR tenpcnt : DblDyneVec;
+                    VAR ninetypcnt : DblDyneVec;
+                    VAR means : DblDyneVec;
+                    VAR median : DblDyneVec);
+    }
+    procedure BoxPlot(nbars : integer;
+                    max, min : double;
+                    VAR lowqrtl : DblDyneVec;
+                    VAR hiqrtl : DblDyneVec;
+                    VAR tenpcnt : DblDyneVec;
+                    VAR ninetypcnt : DblDyneVec;
+                    VAR means : DblDyneVec;
+                    VAR median : DblDyneVec);
+
+  public
+    { public declarations }
+  end; 
+
+var
+  BoxPlotFrm: TBoxPlotFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TBoxPlotFrm }
+
+procedure TBoxPlotFrm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  VarList.Clear;
+  GroupEdit.Text := '';
+  MeasEdit.Text := '';
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+end;
+
+procedure TBoxPlotFrm.VarListClick(Sender: TObject);
+var
+  index: integer;
+
+begin
+  index := VarList.ItemIndex;
+  if index > -1 then
+  begin
+    if (GroupEdit.Text = '') then
+      GroupEdit.Text := VarList.Items[index]
+    else
+      MeasEdit.Text := VarList.Items[index];
+  end;
+end;
+
+procedure TBoxPlotFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).tag);
+end;
+
+procedure TBoxPlotFrm.ComputeBtnClick(Sender: TObject);
+var
+  i, j, k, GrpVar, MeasVar, mingrp, maxgrp, G, NoGrps, cnt : integer;
+  nscrgrps : integer;
+  X, tenpcnt, ninepcnt, qrtile1, qrtile2, qrtile3 : double;
+  minscr, maxscr, intvlsize, lastX : double;
+  cellstring: string;
+  means, lowqrtl, hiqrtl, tenpcntile, ninetypcntile, median : DblDyneVec;
+  freq : DblDyneVec;
+  Scores : DblDyneVec;
+  cumfreq : DblDyneVec;
+  prank : DblDyneVec;
+  grpsize : IntDyneVec;
+  scrgrp : DblDyneVec;
+  done : boolean;
+  NoSelected : integer;
+  ColNoSelected : IntDyneVec;
+  lReport: TStrings;
+begin
+  lReport := TStringList.Create;
+  try
+    lReport.Add('BOX PLOTS OF GROUPS');
+    lReport.Add('');
+
+    GrpVar := 0;
+    MeasVar := 0;
+    for i := 1 to NoVariables do
+    begin
+      cellstring := OS3MainFrm.DataGrid.Cells[i,0];
+      if cellstring = GroupEdit.Text then GrpVar := i;
+      if cellstring = MeasEdit.Text then MeasVar := i;
+    end;
+    if GrpVar = 0 then
+    begin
+      MessageDlg('Group variable not selected.', mtError, [mbOK], 0);
+      exit;
+    end;
+    if MeasVar = 0 then
+    begin
+      MessageDlg('Measurement variable not selected.', mtError, [mbOK], 0);
+      exit;
+    end;
+
+    NoSelected := 2;
+    SetLength(ColNoSelected, NoSelected);
+    ColNoSelected[0] := GrpVar;
+    ColNoSelected[1] := MeasVar;
+
+    // get minimum and maximum group values
+    mingrp := 10000;
+    maxgrp := -10000;
+    for i := 1 to NoCases do
+    begin
+      if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+      G := round(StrToFloat(OS3MainFrm.DataGrid.Cells[GrpVar,i]));
+      if G < mingrp then mingrp := G;
+      if G > maxgrp then maxgrp := G;
+    end;
+    NoGrps := maxgrp - mingrp + 1;
+    if NoGrps > 30 then
+    begin
+      MessageDlg('Too many groups for meaningful plot.', mtError, [mbOK], 0);
+      exit;
+    end;
+
+    SetLength(freq,2 * NoCases + 1);
+    SetLength(Scores,2 * NoCases + 1);
+    SetLength(cumfreq,2 * NoCases + 1);
+    SetLength(prank,2 * NoCases + 1);
+
+    SetLength(grpsize,NoGrps+1);
+    SetLength(means,NoGrps+1);
+    SetLength(lowqrtl,NoGrps+1);
+    SetLength(hiqrtl,NoGrps+1);
+    SetLength(tenpcntile,NoGrps+1);
+    SetLength(ninetypcntile,NoGrps+1);
+    SetLength(median,NoGrps+1);
+    SetLength(scrgrp,NoGrps+1);
+
+    // initialize
+    for j := 1 to NoGrps do
+    begin
+      means[j-1] := 0.0;
+      grpsize[j-1] := 0;
+    end;
+
+    // get minimum and maximum scores and score interval
+    intvlsize := 10000.0;
+    lastX := 0.0;
+    X := StrToFloat(OS3MainFrm.DataGrid.Cells[MeasVar,1]);
+    minscr := X;
+    maxscr := X;
+    for i := 1 to NoCases do
+    begin
+      if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+      X := StrToFloat(OS3MainFrm.DataGrid.Cells[MeasVar,i]);
+      if X > maxscr then maxscr := X;
+      if X < minscr then minscr := X;
+      if i > 1 then // get interval size as minimum difference between 2 scores
+      begin
+        if (X <> lastX) and (abs(X - lastX) < intvlsize) then
+          intvlsize := abs(X - lastX);
+        lastX := X;
+      end else
+        lastX := X;
+    end;
+
+    //  check for excess no. of intervals and reset if needed
+    nscrgrps := round((maxscr - minscr) / intvlsize);
+    if nscrgrps > 2 * NoCases then
+      intvlsize := (maxscr - minscr) / NoCases;
+
+    // setup score groups
+    done := false;
+    Scores[0] := minscr - intvlsize / 2.0;
+    nscrgrps := 0;
+    lastX := maxscr + intvlsize + intvlsize / 2.0;
+
+    while not done do
+    begin
+      nscrgrps := nscrgrps + 1;
+      Scores[nscrgrps] := minscr + (nscrgrps * intvlsize) - intvlsize / 2.0;
+      if Scores[nscrgrps] > lastX then done := true;
+    end;
+    Scores[nscrgrps+1] := Scores[nscrgrps] + intvlsize;
+    if Scores[0] < minscr then minscr := Scores[0];
+    if Scores[nscrgrps] > maxscr then maxscr := Scores[nscrgrps];
+
+    // do analysis for each group
+    for j := 1 to NoGrps do // group
+    begin
+      // get score groups for this group j
+      for i := 0 to nscrgrps do
+      begin
+        cumfreq[i] := 0.0;
+        freq[i] := 0.0;
+      end;
+      cnt := 0;
+      for i := 1 to NoCases do
+      begin // get scores for this group j
+        if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        G := round(StrToFloat(OS3MainFrm.DataGrid.Cells[GrpVar,i]));
+        G := G - mingrp + 1;
+        if G = j then // subject in this group
+        begin
+          cnt := cnt + 1;
+          X := StrToFloat(OS3MainFrm.DataGrid.Cells[MeasVar,i]);
+          means[j-1] := means[j-1] + X;
+          // find score interval and add to the frequency
+          for k := 0 to nscrgrps do
+            if (X >= Scores[k]) and (X < Scores[k+1]) then
+              freq[k] := freq[k] + 1;
+        end;
+      end;
+      grpsize[j-1] := cnt;
+      if grpsize[j-1] > 0 then means[j-1] := means[j-1] / grpsize[j-1];
+
+      // accumulate frequencies
+      cumfreq[0] := freq[0];
+      for i := 1 to nscrgrps-1 do
+        cumfreq[i] := cumfreq[i-1] + freq[i];
+      cumfreq[nscrgrps] := cumfreq[nscrgrps-1];
+
+      // get percentile ranks
+      prank[0] := ((cumfreq[0] / 2.0) / grpsize[j-1]) * 100.0;
+      for i := 1 to nscrgrps-1 do
+        prank[i] := ((cumfreq[i-1] + (freq[i] / 2.0)) / grpsize[j-1]) * 100.0;
+
+      // get centiles required.
+      tenpcnt := 0.10 * grpsize[j-1];
+      tenpcntile[j-1] := Percentile(nscrgrps,tenpcnt,freq,cumfreq,scores);
+      ninepcnt := 0.90 * grpsize[j-1];
+      ninetypcntile[j-1] := Percentile(nscrgrps,ninepcnt,freq,cumfreq,scores);
+      qrtile1 := 0.25 * grpsize[j-1];
+      lowqrtl[j-1] := Percentile(nscrgrps,qrtile1,freq,cumfreq,scores);
+      qrtile2 := 0.50 * grpsize[j-1];
+      median[j-1] := Percentile(nscrgrps,qrtile2,freq,cumfreq,scores);
+      qrtile3 := 0.75 * grpsize[j-1];
+      hiqrtl[j-1] := Percentile(nscrgrps,qrtile3,freq,cumfreq,scores);
+
+      if ShowChk.Checked then
+      begin
+        if j > 1 then lReport.Add('');
+        lReport.Add('RESULTS FOR GROUP %d, MEAN = %.3f', [j, means[j-1]]);
+        lReport.Add('');
+        lReport.Add('Centile       Value');
+        lReport.Add('------------ ------');
+        lReport.Add('Ten          %6.3f', [tenpcntile[j-1]]);
+        lReport.Add('Twenty five  %6.3f', [lowqrtl[j-1]]);
+        lReport.Add('Median       %6.3f', [median[j-1]]);
+        lReport.Add('Seventy five %6.3f', [hiqrtl[j-1]]);
+        lReport.Add('Ninety       %6.3f', [ninetypcntile[j-1]]);
+        lReport.Add('');
+        lReport.Add('Score Range     Frequency Cum.Freq. Percentile Rank');
+        lReport.Add('--------------- --------- --------- ---------------');
+        for i := 0 to nscrgrps-1 do
+          lReport.Add('%6.2f - %6.2f    %6.2f    %6.2f     %6.2f', [
+            Scores[i], Scores[i+1], freq[i], cumfreq[i], prank[i]
+          ]);
+        lReport.Add('');
+      end;
+    end; // get values for next group
+
+    if ShowChk.Checked then
+      DisplayReport(lReport);
+
+    // plot the boxes
+    BoxPlot(NoGrps, maxscr, minscr, lowqrtl, hiqrtl, tenpcntile, ninetypcntile, means, median);
+
+  finally
+    lReport.Free;
+
+    // Clean up
+    scrgrp := nil;
+    median := nil;
+    ninetypcntile := nil;
+    tenpcntile := nil;
+    hiqrtl := nil;
+    lowqrtl := nil;
+    means := nil;
+    grpsize := nil;
+    cumfreq := nil;
+    scores := nil;
+    freq := nil;
+    ColNoSelected := nil;
+  end;
+end;
+
+procedure TBoxPlotFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TBoxPlotFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if BlankFrm = nil then Application.CreateForm(TBlankFrm, BlankFrm);
+end;
+
+procedure TBoxPlotFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+function TBoxPlotFrm.Percentile(nscrgrps: integer;
+                                pcnt: double;
+                                var freq: DblDyneVec;
+                                var cumfreq: DblDyneVec;
+                                var scores: DblDyneVec) : double;
+var
+  i, interval: integer;
+  pcntile, Llimit, Ulimit, cumlower, intvlfreq: double;
+begin
+  interval := 0;
+  for i := 0 to nscrgrps-1 do
+  begin
+    if cumfreq[i] > pcnt then
+    begin
+      interval := i;
+      Break;
+    end;
+  end;
+
+  if interval > 0 then
+  begin
+    Llimit := Scores[interval];
+    Ulimit := Scores[interval+1];
+    cumlower := cumfreq[interval-1];
+    intvlfreq := freq[interval];
+  end
+  else
+  begin // Percentile in first interval
+    Llimit := Scores[0];
+    Ulimit := Scores[1];
+    cumlower := 0.0;
+    intvlfreq := freq[0];
+  end;
+
+  if intvlfreq > 0 then
+    pcntile := Llimit + ((pcnt - cumlower) / intvlfreq) * (Ulimit- Llimit)
+  else
+    pcntile := Llimit;
+
+  Result := pcntile;
+end;
+//-------------------------------------------------------------------
+
+{
+procedure TBoxPlotFrm.pBoxPlot(nbars : integer;
+                    max, min : double;
+                    VAR lowqrtl : DblDyneVec;
+                    VAR hiqrtl : DblDyneVec;
+                    VAR tenpcnt : DblDyneVec;
+                    VAR ninetypcnt : DblDyneVec;
+                    VAR means : DblDyneVec;
+                    VAR median : DblDyneVec);
+var
+   i, HTickSpace, imagewide, imagehi, vtop, vbottom, offset : integer;
+   vhi, hleft, hright, hwide, barwidth, Xpos, Ypos, strhi, strwide : integer;
+//   coords : array [1..5] of TPoint;
+   X, Y, colcycle : integer;
+   X1, X2, X3, X9, X10 : integer; // X coordinates for box and lines
+   Y1, Y2, Y3, Y4, Y9 : integer; // Y coordinates for box and lines
+   Title : string;
+   valincr, Yvalue : double;
+
+begin
+     Printer.Orientation := poLandscape;
+     Printer.BeginDoc;
+     Title := 'BOXPLOT FOR : ' + OS3MainFrm.FileNameEdit.Text;
+     imagewide := Printer.PageWidth;
+     imagehi := Printer.PageHeight;
+     vtop := 400;
+     vbottom := round(imagehi) - 400;
+//     vhi := vbottom - vtop;
+     hleft := 400;
+     hright := imagewide - 40;
+     hwide := hright - hleft;
+
+     // show title
+     Printer.Canvas.Brush.Color := clWhite;
+     strhi := Printer.Canvas.TextWidth(Title) div 2;
+     strhi := imagewide div 2 - strhi;
+     Printer.Canvas.TextOut(strhi,50,Title);
+
+     // show legend
+     Y := Printer.Canvas.TextHeight(Title) * 2;
+     Y := Y + 50;
+     Title := 'RED: mean, BLACK: median, BOX: 25th to 75th percentile, WISKERS: 10th and 90th percentile';
+     X := imagewide div 2 - Printer.Canvas.TextWidth(Title) div 2;
+     Printer.Canvas.TextOut(X,Y,Title);
+
+     Printer.Canvas.Pen.Color := clBlack;
+     Printer.Canvas.Brush.Color := clWhite;
+
+     // Draw chart border
+     Printer.Canvas.Rectangle(hleft,vtop,hright,vbottom);
+     vbottom := vbottom - 400; // decrease bottom
+     vhi := vbottom - vtop;
+
+     // Draw vertical axis
+     valincr := (max - min) / 20.0;
+     for i := 1 to 21 do
+     begin
+          Title := format('%8.2f',[max - ((i-1)*valincr)]);
+          strwide := Printer.Canvas.TextWidth(Title);
+          strhi := Printer.Canvas.TextHeight(Title);
+          xpos := 20 + hleft;
+          Yvalue := max - (valincr * (i-1));
+          ypos := round(vhi * ( (max - Yvalue) / (max - min)));
+          ypos := ypos + vtop - strhi div 2;
+          Printer.Canvas.TextOut(xpos,ypos,Title);
+     end;
+     Printer.Canvas.MoveTo(hleft + strwide + 50,vtop);
+     Printer.Canvas.LineTo(hleft + strwide + 50,vbottom+20);
+     hwide := hwide - (strwide + 50);
+     hleft := hleft + strwide + 50;
+     HTickSpace := hwide div (nbars + 1);
+     barwidth := HTickSpace div 2;
+
+     // draw horizontal axis
+     Printer.Canvas.MoveTo(hleft,vbottom + 20);
+     Printer.Canvas.LineTo(hright,vbottom + 20);
+     for i := 1 to nbars do
+     begin
+          ypos := vbottom + 10;
+          xpos := round((hwide / (nbars+1))* i + hleft);
+          Printer.Canvas.MoveTo(xpos,ypos);
+          ypos := ypos + 10;
+          Printer.Canvas.LineTo(xpos,ypos);
+          Title := format('%d',[i]);
+          offset := Printer.Canvas.TextWidth(Title) div 2;
+          strhi := Printer.Canvas.TextHeight(Title);
+          xpos := xpos - offset;
+          ypos := ypos + strhi;
+          Printer.Canvas.Pen.Color := clBlack;
+          Printer.Canvas.TextOut(xpos,ypos,Title);
+          xpos := hleft;
+          Printer.Canvas.TextOut(xpos,ypos,'GROUPS:');
+     end;
+
+    for i := 1 to nbars do
+    begin
+        colcycle := i mod 4; // select a color for box
+        if (colcycle = 0) then Printer.Canvas.Brush.Color := clBlue;
+        if (colcycle = 1) then Printer.Canvas.Brush.Color := clGreen;
+        if (colcycle = 2) then Printer.Canvas.Brush.Color := clFuchsia;
+        if (colcycle = 3) then Printer.Canvas.Brush.Color := clLime;
+
+        // plot the box front face
+        X9 := round(hleft + ((i) * HTickSpace) - (barwidth / 2));
+        X10 := X9 + barwidth;
+        X1 := X9;
+        X2 := X10;
+        Ypos:= round((((max - hiqrtl[i-1]) / (max - min)) * vhi) + vtop);
+        Y1 := Ypos;
+        Ypos := round((((max - lowqrtl[i-1]) / (max - min)) * vhi) + vtop);
+        Y2 := Ypos;
+        Printer.Canvas.Rectangle(X1,Y1,X2,Y2);
+
+        // draw upper 90th percentile line and end
+        X3 := round(X1 + barwidth / 2);
+        Printer.Canvas.MoveTo(X3,Y1);
+        Ypos := round((((max - ninetypcnt[i-1]) / (max - min)) * vhi) + vtop);
+        Y3 := Ypos;
+        Printer.Canvas.LineTo(X3,Y3);
+        Printer.Canvas.MoveTo(X1,Y3);
+        Printer.Canvas.LineTo(X2,Y3);
+
+        // draw lower 10th percentile line and end
+        Printer.Canvas.MoveTo(X3,Y2);
+        Ypos := round((((max - tenpcnt[i-1]) / (max - min)) * vhi) + vtop);
+        Y4 := Ypos;
+        Printer.Canvas.LineTo(X3,Y4);
+        Printer.Canvas.MoveTo(X1,Y4);
+        Printer.Canvas.LineTo(X2,Y4);
+
+        //plot the mean line
+        Printer.Canvas.Pen.Width := 10;
+        Printer.Canvas.Pen.Color := clRed;
+        Printer.Canvas.Pen.Style := psDot;
+        Ypos := round((((max - means[i-1]) / (max - min)) * vhi) + vtop);
+        Y9 := Ypos;
+        Printer.Canvas.MoveTo(X9,Y9);
+        Printer.Canvas.LineTo(X10,Y9);
+        Printer.Canvas.Pen.Color := clBlack;
+        Printer.Canvas.Pen.Style := psSolid;
+
+        //plot the median line
+        Printer.Canvas.Pen.Color := clBlack;
+        Ypos := round((((max - median[i-1]) / (max - min)) * vhi) + vtop);
+        Y9 := Ypos;
+        Printer.Canvas.MoveTo(X9,Y9);
+        Printer.Canvas.LineTo(X10,Y9);
+        Printer.Canvas.Pen.Color := clBlack;
+
+    end;
+    Printer.EndDoc;
+    Printer.Orientation := poPortrait;
+end;
+}
+
+//--------------------------------------------------------------------------
+
+procedure TBoxPlotFrm.BoxPlot(nbars: integer;
+                              max, min: double;
+                              var lowqrtl: DblDyneVec;
+                              var hiqrtl: DblDyneVec;
+                              var tenpcnt: DblDyneVec;
+                              var ninetypcnt: DblDyneVec;
+                              var means: DblDyneVec;
+                              var median: DblDyneVec);
+const
+  BOX_COLORS: Array[0..3] of TColor = (clBlue, clGreen, clFuchsia, clLime);
+var
+  i, HTickSpace, imagewide, imagehi, vtop, vbottom, offset: integer;
+  vhi, hleft, hright, hwide, barwidth, Xpos, Ypos, strhi: integer;
+  XOffset, YOffset: integer;
+  X, Y: integer;
+  X1, X2, X3, X9, X10: integer; // X coordinates for box and lines
+  Y1, Y2, Y3, Y4, Y9: integer; // Y coordinates for box and lines
+  Title: string;
+  valincr, Yvalue: double;
+begin
+  BlankFrm.Show;
+  //BlankFrm.Image1.Canvas.Clear;
+
+  imagewide := BlankFrm.Image1.width;
+  imagehi := BlankFrm.Image1.Height;
+  XOffset := imagewide div 10;
+  YOffset := imagehi div 10;
+
+  vtop := YOffset;
+  vbottom := imagehi - YOffset;
+  vhi := vbottom - vtop;
+  hleft := XOffset;
+  hright := imagewide - hleft - XOffset;
+  hwide := hright - hleft;
+  HTickSpace := hwide div nbars;
+  barwidth := HTickSpace div 2;
+
+
+  // Show title
+  Title := 'BOXPLOT FOR : ' + OS3MainFrm.FileNameEdit.Text;
+  BlankFrm.Caption := Title;
+(*
+  // show legend
+  Y := BlankFrm.Image1.Canvas.TextHeight(Title) * 2;
+  Y := Y + vtop;
+  Title := 'RED: mean, BLACK: median, BOX: 25th to 75th percentile, WISKERS: 10th and 90th percentile';
+  X := imagewide div 2 - BlankFrm.Canvas.TextWidth(Title) div 2;
+  BlankFrm.Image1.Canvas.TextOut(X,Y,Title);
+  *)
+
+  // Draw chart background and border
+  BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+  BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+  BlankFrm.Image1.Canvas.Rectangle(0,0,imagewide,imagehi);
+
+  // show legend
+  Y := 2;
+  Title := 'RED: mean, BLACK: median, BOX: 25th to 75th percentile, WISKERS: 10th and 90th percentile';
+  X := imagewide div 2 - BlankFrm.Canvas.TextWidth(Title) div 2;
+  BlankFrm.Image1.Canvas.TextOut(X,Y,Title);
+
+  // Draw vertical axis
+  valincr := (max - min) / 20.0;
+  for i := 1 to 21 do
+  begin
+    Title := format('%8.2f',[max - ((i-1)*valincr)]);
+    strhi := BlankFrm.Image1.Canvas.TextHeight(Title);
+    xpos := XOffset;
+    Yvalue := max - (valincr * (i-1));
+    ypos := round(vhi * ( (max - Yvalue) / (max - min)));
+    ypos := ypos + vtop - strhi div 2;
+    BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+  end;
+  BlankFrm.Image1.Canvas.MoveTo(hleft,vtop);
+  BlankFrm.Image1.Canvas.LineTo(hleft,vbottom);
+
+  // draw horizontal axis
+  BlankFrm.Image1.Canvas.MoveTo(hleft,vbottom + 10 );
+  BlankFrm.Image1.Canvas.LineTo(hright,vbottom + 10);
+  for i := 1 to nbars do
+  begin
+    ypos := vbottom + 10;
+    xpos := round((hwide / nbars)* i + hleft);
+    BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+    ypos := ypos + 10;
+    BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+    Title := format('%d',[i]);
+    offset := BlankFrm.Image1.Canvas.TextWidth(Title) div 2;
+    strhi := BlankFrm.Image1.Canvas.TextHeight(Title);
+    xpos := xpos - offset;
+    ypos := ypos + strhi - 2;
+    BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+    BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+    xpos := 20;
+    BlankFrm.Image1.Canvas.TextOut(xpos,ypos,'GROUPS:');
+  end;
+
+  for i := 1 to nbars do
+  begin
+    BlankFrm.Image1.Canvas.Brush.Color := BOX_COLORS[i mod 4];
+
+    // plot the box front face
+    X9 := round(hleft + ((i) * HTickSpace) - (barwidth / 2));
+    X10 := X9 + barwidth;
+    X1 := X9;
+    X2 := X10;
+    Y1 := round((((max - hiqrtl[i-1]) / (max - min)) * vhi) + vtop);
+    Y2 := round((((max - lowqrtl[i-1]) / (max - min)) * vhi) + vtop);
+    BlankFrm.Image1.Canvas.Rectangle(X1,Y1,X2,Y2);
+
+    // draw upper 90th percentile line and end
+    X3 := round(X1 + barwidth / 2);
+    BlankFrm.Image1.Canvas.MoveTo(X3,Y1);
+    Y3 := round((((max - ninetypcnt[i-1]) / (max - min)) * vhi) + vtop);
+    BlankFrm.Image1.Canvas.LineTo(X3,Y3);
+    BlankFrm.Image1.Canvas.MoveTo(X1,Y3);
+    BlankFrm.Image1.Canvas.LineTo(X2,Y3);
+
+    // draw lower 10th percentile line and end
+    BlankFrm.Image1.Canvas.MoveTo(X3,Y2);
+    Y4 := round((((max - tenpcnt[i-1]) / (max - min)) * vhi) + vtop);
+    BlankFrm.Image1.Canvas.LineTo(X3,Y4);
+    BlankFrm.Image1.Canvas.MoveTo(X1,Y4);
+    BlankFrm.Image1.Canvas.LineTo(X2,Y4);
+
+    //plot the means line
+    BlankFrm.Image1.Canvas.Pen.Color := clRed;
+    BlankFrm.Image1.Canvas.Pen.Style := psDot;
+    Y9 := round((((max - means[i-1]) / (max - min)) * vhi) + vtop);
+    BlankFrm.Image1.Canvas.MoveTo(X9,Y9);
+    BlankFrm.Image1.Canvas.LineTo(X10,Y9);
+    BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+    BlankFrm.Image1.Canvas.Pen.Style := psSolid;
+
+    //plot the median line
+    BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+    Y9 := round((((max - median[i-1]) / (max - min)) * vhi) + vtop);
+    BlankFrm.Image1.Canvas.MoveTo(X9,Y9);
+    BlankFrm.Image1.Canvas.LineTo(X10,Y9);
+    BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+  end;
+end;
+
+
+initialization
+  {$I boxplotunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/breakdownunit.lfm

@@ -0,0 +1,305 @@
+object BreakDownFrm: TBreakDownFrm
+  Left = 400
+  Height = 367
+  Top = 248
+  Width = 428
+  AutoSize = True
+  Caption = 'Breakdown'
+  ClientHeight = 367
+  ClientWidth = 428
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object CheckGroup1: TCheckGroup
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Panel2
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 51
+    Top = 267
+    Width = 140
+    Anchors = [akLeft, akBottom]
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'Option'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 31
+    ClientWidth = 136
+    Items.Strings = (
+      'One Way ANOVA'
+    )
+    TabOrder = 1
+    Data = {
+      0100000002
+    }
+  end
+  object Panel2: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CheckGroup1
+    Left = 8
+    Height = 251
+    Top = 8
+    Width = 412
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Around = 8
+    BevelOuter = bvNone
+    ClientHeight = 251
+    ClientWidth = 412
+    Constraints.MinHeight = 200
+    TabOrder = 0
+    object AvailLabel: TLabel
+      AnchorSideLeft.Control = Panel2
+      AnchorSideTop.Control = Panel2
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 97
+      Caption = 'Available Variables'
+      ParentColor = False
+    end
+    object AnalLabel: TLabel
+      AnchorSideLeft.Control = SelList
+      AnchorSideTop.Control = Panel2
+      Left = 228
+      Height = 15
+      Top = 0
+      Width = 104
+      Caption = 'Variables to Analyze'
+      ParentColor = False
+    end
+    object SelLabel: TLabel
+      AnchorSideLeft.Control = SelList
+      AnchorSideBottom.Control = DepVar
+      Left = 228
+      Height = 15
+      Top = 199
+      Width = 153
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 2
+      Caption = 'Selected Continuous Variable'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel2
+      AnchorSideTop.Control = AvailLabel
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = InBtn
+      AnchorSideBottom.Control = Panel2
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 234
+      Top = 17
+      Width = 184
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 0
+    end
+    object SelList: TListBox
+      AnchorSideLeft.Control = InBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = AnalLabel
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel2
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = SelVarInBtn
+      Left = 228
+      Height = 166
+      Top = 17
+      Width = 184
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 2
+      BorderSpacing.Bottom = 8
+      ItemHeight = 0
+      OnSelectionChange = SelListSelectionChange
+      TabOrder = 3
+    end
+    object DepVar: TEdit
+      AnchorSideLeft.Control = SelList
+      AnchorSideTop.Control = SelLabel
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = SelList
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = SelVarOutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 228
+      Height = 23
+      Top = 216
+      Width = 184
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 6
+      Text = 'DepVar'
+    end
+    object InBtn: TBitBtn
+      AnchorSideLeft.Control = Panel2
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = VarList
+      Left = 192
+      Height = 28
+      Top = 17
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = InBtnClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object OutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel2
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = InBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 192
+      Height = 28
+      Top = 49
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = OutBtnClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object SelVarInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel2
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideBottom.Control = SelVarOutBtn
+      Left = 192
+      Height = 28
+      Top = 191
+      Width = 28
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = SelVarInBtnClick
+      Spacing = 0
+      TabOrder = 4
+    end
+    object SelVarOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel2
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideBottom.Control = VarList
+      AnchorSideBottom.Side = asrBottom
+      Left = 192
+      Height = 28
+      Top = 223
+      Width = 28
+      Anchors = [akLeft, akBottom]
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = SelVarOutBtnClick
+      Spacing = 0
+      TabOrder = 5
+    end
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 361
+    Height = 25
+    Top = 334
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 4
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 215
+    Height = 25
+    Top = 334
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 3
+  end
+  object HelpBtn: TButton
+    Tag = 109
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 156
+    Height = 25
+    Top = 334
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 2
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 318
+    Width = 428
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 277
+    Height = 25
+    Top = 334
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 5
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/breakdownunit.pas

@@ -0,0 +1,666 @@
+// Use "twoway.laz" for testing
+
+unit BreakDownUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls, Buttons,
+  MainUnit, Globals, FunctionsLib, OutputUnit, DataProcs, ContextHelpUnit;
+
+type
+
+  { TBreakDownFrm }
+
+  TBreakDownFrm = class(TForm)
+    Bevel1: TBevel;
+    ComputeBtn: TButton;
+    HelpBtn: TButton;
+    InBtn: TBitBtn;
+    OutBtn: TBitBtn;
+    Panel2: TPanel;
+    SelVarInBtn: TBitBtn;
+    SelVarOutBtn: TBitBtn;
+    ResetBtn: TButton;
+    CloseBtn: TButton;
+    CheckGroup1: TCheckGroup;
+    DepVar: TEdit;
+    AvailLabel: TLabel;
+    AnalLabel: TLabel;
+    SelLabel: TLabel;
+    SelList: TListBox;
+    VarList: TListBox;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure InBtnClick(Sender: TObject);
+    procedure OutBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure SelListSelectionChange(Sender: TObject; User: boolean);
+    procedure SelVarInBtnClick(Sender: TObject);
+    procedure SelVarOutBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    Minimum, Maximum, levels, displace, subscript : IntDyneVec;
+    Freq : IntDyneVec;
+    Selected : IntDyneVec;
+    mean, variance, Stddev, SS : DblDyneVec;
+    index, NoSelected, ListSize, Dependentvar, X, length_array : integer;
+    ptr1, ptr2, sum, grandsum : integer;
+    xsumtotal, xsqrtotal, grandsumx, grandsumx2, value, SD : double;
+    SST, SSW, SSB, MSW, MSB, F, FProb, DF1, DF2 : double;
+    cellstring : string;
+    outline : string;
+    valstr : string;
+    dataread : boolean;
+    function Index_Pos(var X1: IntDyneVec; var displace1: IntDyneVec; ListSize1: integer): Integer;
+    procedure UpdateBtnStates;
+
+  public
+    { public declarations }
+  end; 
+
+var
+  BreakDownFrm: TBreakDownFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TBreakDownFrm }
+
+procedure TBreakDownFrm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+
+begin
+  VarList.Clear;
+  SelList.Clear;
+  DepVar.Text := '';
+  InBtn.Enabled := true;
+  OutBtn.Enabled := false;
+  SelVarInBtn.Enabled := true;
+  SelVarOutBtn.Enabled := false;
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  UpdateBtnStates;
+end;
+
+procedure TBreakDownFrm.SelListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+procedure TBreakDownFrm.SelVarInBtnClick(Sender: TObject);
+var
+  index1 : integer;
+begin
+  index1 := VarList.ItemIndex;
+  if (index1 > -1) and (DepVar.Text = '') then
+  begin
+    DepVar.Text := VarList.Items[index1];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TBreakDownFrm.SelVarOutBtnClick(Sender: TObject);
+begin
+  if DepVar.Text <> '' then
+    VarList.Items.Add(DepVar.Text);
+  UpdateBtnStates;
+end;
+
+procedure TBreakDownFrm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+procedure TBreakDownFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).Tag);
+end;
+
+procedure TBreakDownFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  //Panel2.Constraints.MinWidth := SelLabel.Width * 2 + InBtn.Width + 2 * VarList.BorderSpacing.Right;
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TBreakDownFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+end;
+
+procedure TBreakDownFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TBreakDownFrm.InBtnClick(Sender: TObject);
+var
+   i: integer;
+begin
+  i := 0;
+  while i < VarList.Items.Count do
+  begin
+    if (VarList.Selected[i]) then
+    begin
+      SelList.Items.Add(VarList.Items[i]);
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TBreakDownFrm.ComputeBtnClick(Sender: TObject);
+label
+  Label1, Label3, Label4, NextStep, FirstOne, SecondOne, ThirdOne, LastStep;
+var
+  i, j: integer;
+  tempval: string;
+  lReport: TStrings;
+begin
+  // Identify columns of variables to analyze and the dependent var.
+  NoSelected := SelList.Items.Count;
+
+  if NoSelected = 0 then
+  begin
+     MessageDlg('No variables selected.', mtError, [mbOK], 0);
+     exit;
+  end;
+
+  // Get column no. of dependent variable
+  dependentVar := 0;
+  cellstring := DepVar.Text;
+  for i := 1 to NoVariables do
+    if cellstring = OS3MainFrm.DataGrid.Cells[i,0] then dependentvar := i;
+
+  if dependentVar = 0 then
+  begin
+     MessageDlg('Continuous variable is not specified.', mtError, [mbOK], 0);
+     exit;
+  end;
+
+  // Allocate heap
+  SetLength(Minimum,NoVariables);
+  SetLength(Maximum,NoVariables);
+  SetLength(levels,NoVariables);
+  SetLength(displace,NoVariables);
+  SetLength(subscript,NoVariables);
+  SetLength(Selected,NoVariables);
+
+  // Get selected variables
+  for i := 1 to NoSelected do
+  begin
+    cellstring := SelList.Items.Strings[i-1];
+    for j := 1 to NoVariables do
+      if cellstring = OS3MainFrm.DataGrid.Cells[j,0] then Selected[i-1] := j;
+  end;
+  Selected[NoSelected] := dependentvar;
+  ListSize := NoSelected;
+
+  // Get maximum and minimum levels in each variable
+  for i := 1 to ListSize do
+  begin
+    index := Selected[i-1];
+    Minimum[i-1] := round(StrToFloat(OS3MainFrm.DataGrid.Cells[index,1]));
+    Maximum[i-1] := Minimum[i-1];
+    for j := 1 to NoCases do
+    begin
+      if GoodRecord(j,NoSelected,Selected) then
+      begin
+        X := round(StrToFloat(OS3MainFrm.DataGrid.Cells[index,j]));
+        if X < Minimum[i-1] then Minimum[i-1] := X;
+        if X > Maximum[i-1] then Maximum[i-1] := X;
+      end;
+    end;
+  end;
+
+  // Calculate number of levels for each variable
+  for i := 1 to  ListSize do
+    levels[i-1] := Maximum[i-1] - Minimum[i-1] + 1;
+  displace[ListSize-1] := 1;
+  if ListSize > 1 then
+    for i := ListSize-1 downto 1 do
+      displace[i-1] := levels[i] * displace[i];
+
+  // Now, tabulate
+  length_array := 1;
+  for i := 1 to ListSize do
+    length_array := Length_array * levels[i-1];
+
+  // initialize values
+  SetLength(Freq, length_array+1);
+  SetLength(mean, length_array+1);
+  SetLength(variance, length_array+1);
+  SetLength(Stddev, length_array+1);
+  SetLength(SS, length_array+1);
+
+  for i := 0 to length_array do
+  begin
+    Freq[i] := 0;
+    mean[i] := 0.0;
+    variance[i] := 0.0;
+    Stddev[i] := 0.0;
+    SS[i] := 0.0;
+  end;
+
+  // tabulate
+  for i := 1 to NoCases do
+  begin
+    dataread := false;
+    if GoodRecord(i,NoSelected,Selected) then
+    begin
+      for j := 1 to ListSize do
+      begin
+        index := Selected[j-1];
+        X := round(StrToFLoat(OS3MainFrm.DataGrid.Cells[index,i]));
+        X := X - Minimum[j-1] + 1;
+        subscript[j-1] := X;
+        dataread := true;
+      end;
+    end;
+    if dataread then
+    begin
+      j := Index_Pos(subscript,displace,ListSize);
+      Freq[j] := Freq[j] + 1;
+      index := dependentvar;
+      tempval := Trim(OS3MainFrm.DataGrid.Cells[index,i]);
+      if tempval <> '' then
+      begin
+        value := StrToFloat(tempval);
+        mean[j] := mean[j] + value;
+        variance[j] := variance[j] + (value * value);
+      end;
+    end;
+  end;
+
+  // setup the output
+  lReport := TStringList.Create;
+  try
+    lReport.Add('BREAKDOWN ANALYSIS PROGRAM');
+    lReport.Add('');
+    lReport.Add('VARIABLE SEQUENCE FOR THE BREAKDOWN:');
+    for i := 1 to ListSize do
+    begin
+      index := Selected[i-1];
+      lReport.Add('%-10s (Variable %3d) Lowest level = %2d Highest level = %2d', [
+        OS3MainFrm.DataGrid.Cells[index,0],i, Minimum[i-1], Maximum[i-1]
+      ]);
+    end;
+
+    // Breakdown the data
+    ptr1 := ListSize - 1;
+    ptr2 := ListSize;
+    for i := 1 to ListSize do
+      subscript[i-1] := 1;
+    sum := 0;
+    xsumtotal := 0.0;
+    xsqrtotal := 0.0;
+    grandsum := 0;
+    grandsumx := 0.0;
+    grandsumx2 := 0.0;
+
+  Label1:
+    index := Index_Pos(subscript, displace, ListSize);
+    lReport.Add('Variable levels:');
+    for i := 1 to ListSize do
+    begin
+      j := Selected[i-1];
+      lReport.Add('%-10s level = %3d', [
+        OS3MainFrm.DataGrid.Cells[j,0], Minimum[i-1] + subscript[i-1] - 1
+      ]);
+    end;
+    lReport.Add('');
+
+    sum := sum + Freq[index];
+    xsumtotal := xsumtotal + mean[index];
+    xsqrtotal := xsqrtotal + variance[index];
+
+    lReport.Add('Freq.     Mean     Std. Dev.');
+    outline := Format('%3d', [Freq[index]]);
+    if Freq[index] > 0 then
+    begin
+      valstr := Format('     %8.3f ',[mean[index] / Freq[index]]);
+      outline := outline + valstr;
+    end
+    else
+      outline := outline +'    ********  ';
+
+    if Freq[index] > 1 then
+    begin
+      SS[index] := variance[index];
+      variance[index] := variance[index] - (mean[index] * mean[index] / Freq[index]);
+      variance[index] := variance[index] / (Freq[index] - 1);
+      Stddev[index] := sqrt(variance[index]);
+      valstr := Format('%8.3f ', [Stddev[index]]);
+      outline := outline + valstr;
+    end else
+      outline := outline + '********';
+
+    lReport.Add(outline);
+    lReport.Add('');
+
+    subscript[ptr2-1] := subscript[ptr2-1] + 1;
+    if subscript[ptr2-1] <= levels[ptr2-1] then goto Label1;
+    lReport.Add('Number of observations across levels = %d',[sum]);
+    if sum > 0 then
+      lReport.Add('Mean across levels = %8.3f',[ xsumtotal / sum])
+    else
+      lReport.Add('Mean across levels = ********');
+
+    if sum > 1 then
+    begin
+      SD := sqrt( (xsqrtotal - (xsumtotal * xsumtotal) / sum) / (sum - 1));
+      lReport.Add('Std. Dev. across levels = %8.3f', [SD]);
+    end else
+      lReport.Add('Std. Dev. across levels = *******');
+
+    lReport.Add('');
+    lReport.Add('===============================================================');
+    lReport.Add('');
+    //OutputFrm.ShowModal;
+    //OutputFrm.Clear;
+
+    grandsum := grandsum + sum;
+    grandsumx := grandsumx + xsumtotal;
+    grandsumx2 := grandsumx2 + xsqrtotal;
+    sum := 0;
+    xsumtotal := 0.0;
+    xsqrtotal := 0.0;
+    if ptr1 < 1 then
+      goto NextStep;
+
+    subscript[ptr1-1] :=subscript[ptr1-1] + 1;
+    if subscript[ptr1-1] <= levels[ptr1-1] then
+      goto Label4;
+
+  Label3:
+    ptr1 := ptr1 - 1;
+    if ptr1 < 1 then
+      goto NextStep;
+    if subscript[ptr1-1] > levels[ptr1-1] then
+      goto Label3;
+
+    subscript[ptr1-1] := subscript[ptr1-1] + 1;
+    if subscript[ptr1-1] > levels[ptr1-1] then
+      goto Label3;
+
+  Label4:
+    for i := ptr1+1 to ListSize do subscript[i-1] := 1;
+    ptr1 := ListSize - 1;
+    if ptr1 < 1 then goto
+      NextStep;
+    goto Label1;
+
+  NextStep:
+    lReport.Add('Grand number of observations across all categories = %3d', [grandsum]);
+    if grandsum > 0 then
+      lReport.Add('Overall Mean = %8.3f', [grandsumx / grandsum]);
+    if grandsum > 1 then
+    begin
+      SD := sqrt((grandsumx2 - (grandsumx * grandsumx) / grandsum) / (grandsum - 1));
+      lReport.Add('Overall standard deviation = %8.3f', [SD]);
+    end;
+
+    lReport.Add('');
+    lReport.Add('===============================================================');
+    lReport.Add('');
+    //OutputFrm.ShowModal;
+    //OutputFrm.Clear;
+
+    // Do ANOVA's if requested
+    if CheckGroup1.CheckEnabled[0] then
+    begin
+      lReport.Add('ANALYSES OF VARIANCE SUMMARY TABLES');
+      lReport.Add('');
+      ptr1 := ListSize - 1;
+      ptr2 := ListSize;
+      for i := 1 to ListSize do subscript[i-1] := 1;
+      SSB := 0.0;
+      SSW := 0.0;
+      MSB := 0.0;
+      MSW := 0.0;
+      grandsum := 0;
+      grandsumx := 0.0;
+      grandsumx2 := 0.0;
+      DF1 := 0.0;
+      DF2 := 0.0;
+
+    FirstOne:
+      index := Index_Pos(subscript, displace, ListSize);
+      if Freq[index] > 0 then
+      begin
+        lReport.Add('Variable levels: ');
+        for i := 1 to  ListSize do
+        begin
+          j := Selected[i-1];
+          lReport.Add('%-10s level = %3d', [
+            OS3MainFrm.DataGrid.Cells[j,0], Minimum[i-1] + subscript[i-1] - 1
+          ]);
+        end;
+        lReport.Add('');
+
+        // build sumsof squares for this set
+        DF1  := DF1 + 1;
+        DF2  := DF2 + Freq[index] - 1;
+        grandsum := grandsum + Freq[index];
+        grandsumx := grandsumx + mean[index];
+        grandsumx2 := grandsumx2 + SS[index];
+        SSW := SSW + SS[index] - (mean[index] * mean[index] / Freq[index]);
+      end;
+      subscript[ptr2-1] := subscript[ptr2-1] + 1;
+      if subscript[ptr2-1] <= levels[ptr2-1] then
+        goto FirstOne;
+
+      if ((grandsum > 0.0) and (DF1 > 1) and (DF2 > 1) and (SSW > 0.0)) then
+      begin
+        // build and show anova table
+        SST := grandsumx2 - (grandsumx * grandsumx / grandsum);
+        SSB := SST - SSW;
+        DF1 := DF1 - 1.0; // no. of groups - 1
+        MSB := SSB / DF1;
+        MSW := SSW / DF2;
+        F := MSB / MSW;
+        FProb := probf(DF1,DF2,F);
+        lReport.Add('SOURCE    D.F.        SS        MS        F       Prob.>F');
+        lReport.Add('GROUPS    %2.0f        %8.2f  %8.2f  %8.3f  %6.4f', [DF1,SSB,MSB,F,FProb]);
+        lReport.Add('WITHIN    %2.0f        %8.2f  %8.2f', [DF2,SSW,MSW]);
+        lReport.Add('TOTAL     %2d        %8.2f', [grandsum-1,SST]);
+        //OutputFrm.ShowModal;
+        //OutputFrm.Clear;
+      end else
+      begin
+        lReport.Add('Insufficient data for ANOVA');
+        //OutputFrm.ShowModal;
+        //OutputFrm.Clear;
+      end;
+      lReport.Add('');
+      lReport.Add('=============================================================');
+      lReport.Add('');
+
+      SSB := 0.0;
+      SSW := 0.0;
+      MSB := 0.0;
+      MSW := 0.0;
+      grandsum := 0;
+      grandsumx := 0.0;
+      grandsumx2 := 0.0;
+      DF1 := 0.0;
+      DF2 := 0.0;
+      if ptr1 < 1 then
+        goto LastStep;
+
+      subscript[ptr1-1] := subscript[ptr1-1] + 1;
+      if subscript[ptr1-1] <= levels[ptr1-1] then
+        goto ThirdOne;
+
+  SecondOne:
+      ptr1 := ptr1 - 1;
+      if ptr1 < 1 then goto LastStep;
+      if subscript[ptr1-1] > levels[ptr1-1] then
+        goto SecondOne;
+
+      subscript[ptr1-1] := subscript[ptr1-1] + 1;
+      if subscript[ptr1-1] > levels[ptr1-1] then
+        goto SecondOne;
+
+  ThirdOne:
+      for i := ptr1+1 to ListSize do subscript[i-1] := 1;
+      ptr1 := ListSize - 1;
+      if ptr1 < 1 then
+        goto LastStep;
+
+      goto FirstOne;
+
+  LastStep:
+      // do anova for all cells
+      lReport.Add('ANOVA FOR ALL CELLS');
+      lReport.Add('');
+      SST := 0.0;
+      SSW := 0.0;
+      DF2 := 0.0;
+      DF1 := 0.0;
+      grandsumx := 0.0;
+      grandsum := 0;
+      for i := 1 to length_array do
+      begin
+        if Freq[i] > 0 then
+        begin
+          SST  := SST + SS[i];
+          grandsum := grandsum + Freq[i];
+          grandsumx := grandsumx + mean[i];
+          SSW := SSW + (SS[i] - (mean[i] * mean[i] / Freq[i]));
+          DF1 := DF1 + 1.0;
+          DF2 := DF2 + (Freq[i] - 1);
+        end;
+      end;
+
+      if ( (DF1 > 1.0) and (DF2 > 1.0) and (SSW > 0.0)) then
+      begin
+        SST := SST - (grandsumx * grandsumx / grandsum);
+        SSB := SST - SSW;
+        DF1 := DF1 - 1;
+        MSB := SSB / DF1;
+        MSW := SSW / DF2;
+        F := MSB / MSW;
+        FProb := probf(DF1, DF2, F);
+        lReport.Add('SOURCE    D.F.        SS        MS        F       Prob.>F');
+        lReport.Add('GROUPS    %2.0f        %8.2f  %8.2f  %8.3f  %6.4f', [DF1, SSB, MSB, F, FProb]);
+        lReport.Add('WITHIN    %2.0f        %8.2f  %8.2f', [DF2, SSW, MSW]);
+        lReport.Add('TOTAL     %2d        %8.2f', [grandsum-1, SST]);
+        lReport.Add('FINISHED');
+      end else
+      begin
+        lReport.Add('Only 1 group.  No ANOVA possible.');
+      end;
+    end;
+
+    // Show report in output form
+    DisplayReport(lReport);
+
+  finally
+    lReport.Free;
+
+    SS := nil;
+    Stddev := nil;
+    variance := nil;
+    mean := nil;
+    Freq := nil;
+    selected := nil;
+    subscript := nil;
+    displace := nil;
+    levels := nil;
+    Maximum := nil;
+    Minimum := nil;
+  end;
+end;
+
+procedure TBreakDownFrm.OutBtnClick(Sender: TObject);
+var
+   i: integer;
+begin
+  i := 0;
+  while i < SelList.Items.Count do
+  begin
+    if (SelList.Selected[i]) then
+    begin
+      VarList.Items.Add(SelList.Items[i]);
+      SelList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+function TBreakDownFrm.Index_Pos(var X1: IntDyneVec; var displace1: IntDyneVec;
+  ListSize1: integer): integer;
+var
+  i: integer;
+begin
+  Result := X1[ListSize-1];
+  for i := 1 to ListSize - 1 do
+    Result := Result + ((X1[i-1] - 1) * displace[i-1]);
+end;
+
+procedure TBreakDownFrm.UpdateBtnStates;
+var
+  lSelected: Boolean;
+  i: Integer;
+begin
+  lSelected := false;
+  for i := 0 to VarList.Count-1 do
+    if VarList.Selected[i] then
+    begin
+      lSelected := true;
+      break;
+    end;
+  InBtn.Enabled := lSelected;
+
+  lSelected := false;
+  for i := 0 to SelList.Count-1 do
+    if SelList.Selected[i] then
+    begin
+      lSelected := true;
+      break;
+    end;
+  OutBtn.Enabled := lSelected;
+
+  SelVarInBtn.Enabled := (VarList.ItemIndex > -1) and (DepVar.Text = '');
+  SelVarOutBtn.Enabled := (DepVar.Text <> '');
+end;
+
+initialization
+  {$I breakdownunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/bubbleplotunit.lfm

@@ -0,0 +1,486 @@
+object BubbleForm: TBubbleForm
+  Left = 473
+  Height = 454
+  Top = 253
+  Width = 500
+  AutoSize = True
+  Caption = 'Repeated Measures Bubble Plot'
+  ClientHeight = 454
+  ClientWidth = 500
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label6: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = TitleEdit
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 316
+    Width = 55
+    BorderSpacing.Left = 8
+    Caption = 'Main Title:'
+    ParentColor = False
+  end
+  object Label7: TLabel
+    AnchorSideTop.Control = XLabelEdit
+    AnchorSideTop.Side = asrCenter
+    AnchorSideRight.Control = XLabelEdit
+    Left = 22
+    Height = 15
+    Top = 347
+    Width = 41
+    Anchors = [akTop, akRight]
+    BorderSpacing.Right = 8
+    Caption = 'X Label:'
+    ParentColor = False
+  end
+  object Label8: TLabel
+    AnchorSideTop.Control = YLabelEdit
+    AnchorSideTop.Side = asrCenter
+    AnchorSideRight.Control = YLabelEdit
+    Left = 293
+    Height = 15
+    Top = 347
+    Width = 41
+    Anchors = [akTop, akRight]
+    BorderSpacing.Right = 8
+    Caption = 'Y Label:'
+    ParentColor = False
+  end
+  object TitleEdit: TEdit
+    AnchorSideLeft.Control = Label6
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Panel1
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = XLabelEdit
+    Left = 71
+    Height = 23
+    Top = 312
+    Width = 421
+    Anchors = [akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Bottom = 8
+    TabOrder = 1
+    TextHint = 'Title of the Diagram'
+  end
+  object XLabelEdit: TEdit
+    AnchorSideLeft.Control = TitleEdit
+    AnchorSideBottom.Control = TransformChk
+    Left = 71
+    Height = 23
+    Top = 343
+    Width = 150
+    Anchors = [akLeft, akBottom]
+    TabOrder = 2
+    TextHint = 'X Axis Title'
+  end
+  object YLabelEdit: TEdit
+    AnchorSideTop.Control = XLabelEdit
+    AnchorSideRight.Control = TitleEdit
+    AnchorSideRight.Side = asrBottom
+    Left = 342
+    Height = 23
+    Top = 343
+    Width = 150
+    Anchors = [akTop, akRight]
+    TabOrder = 3
+    TextHint = 'Y Axis Title'
+  end
+  object TransformChk: TCheckBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Side = asrBottom
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 19
+    Top = 378
+    Width = 365
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Transform Data Grid for ANOVA (Treatments by Subjects ANOVA)'
+    TabOrder = 4
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = TitleEdit
+    Left = 8
+    Height = 296
+    Top = 8
+    Width = 484
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    BevelOuter = bvNone
+    ClientHeight = 296
+    ClientWidth = 484
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Panel1
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 49
+      Caption = 'Variables:'
+      ParentColor = False
+    end
+    object Label2: TLabel
+      AnchorSideLeft.Control = BubbleEdit
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = BubbleEdit
+      Left = 264
+      Height = 15
+      Top = 23
+      Width = 201
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 2
+      Caption = 'Bubble Identification Number Variable'
+      ParentColor = False
+    end
+    object Label3: TLabel
+      AnchorSideLeft.Control = XEdit
+      AnchorSideBottom.Control = XEdit
+      Left = 264
+      Height = 15
+      Top = 97
+      Width = 82
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 2
+      Caption = 'X Value Variable'
+      ParentColor = False
+    end
+    object Label4: TLabel
+      AnchorSideLeft.Control = YEdit
+      AnchorSideBottom.Control = YEdit
+      Left = 264
+      Height = 15
+      Top = 171
+      Width = 82
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 2
+      Caption = 'Y Value Variable'
+      ParentColor = False
+    end
+    object Label5: TLabel
+      AnchorSideLeft.Control = SizeEdit
+      AnchorSideBottom.Control = SizeEdit
+      Left = 264
+      Height = 15
+      Top = 245
+      Width = 104
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 2
+      Caption = 'Bubble Size Variable'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Label1
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = IDInBtn
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 279
+      Top = 17
+      Width = 220
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      ItemHeight = 0
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 0
+    end
+    object IDInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = VarList
+      Left = 228
+      Height = 28
+      Top = 17
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = IDInBtnClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object IDOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = IDInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 228
+      Height = 28
+      Top = 47
+      Width = 28
+      BorderSpacing.Top = 2
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = IDOutBtnClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object XInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = IDOutBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 228
+      Height = 28
+      Top = 91
+      Width = 28
+      BorderSpacing.Top = 16
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = XInBtnClick
+      Spacing = 0
+      TabOrder = 4
+    end
+    object XOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = XInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 228
+      Height = 28
+      Top = 121
+      Width = 28
+      BorderSpacing.Top = 2
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = XOutBtnClick
+      Spacing = 0
+      TabOrder = 5
+    end
+    object YInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = XOutBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 228
+      Height = 28
+      Top = 165
+      Width = 28
+      BorderSpacing.Top = 16
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = YInBtnClick
+      Spacing = 0
+      TabOrder = 7
+    end
+    object YOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = YInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 228
+      Height = 28
+      Top = 195
+      Width = 28
+      BorderSpacing.Top = 2
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = YOutBtnClick
+      Spacing = 0
+      TabOrder = 8
+    end
+    object SizeInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = YOutBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 228
+      Height = 28
+      Top = 239
+      Width = 28
+      BorderSpacing.Top = 16
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = SizeInBtnClick
+      Spacing = 0
+      TabOrder = 10
+    end
+    object SizeOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = SizeInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 228
+      Height = 28
+      Top = 269
+      Width = 28
+      BorderSpacing.Top = 2
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = SizeOutBtnClick
+      Spacing = 0
+      TabOrder = 11
+    end
+    object BubbleEdit: TEdit
+      AnchorSideLeft.Control = IDInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = IDOutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 264
+      Height = 23
+      Top = 40
+      Width = 220
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 3
+      Text = 'BubbleEdit'
+    end
+    object XEdit: TEdit
+      AnchorSideLeft.Control = BubbleEdit
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = XOutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 264
+      Height = 23
+      Top = 114
+      Width = 220
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 6
+      Text = 'XEdit'
+    end
+    object YEdit: TEdit
+      AnchorSideLeft.Control = BubbleEdit
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = YOutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 264
+      Height = 23
+      Top = 188
+      Width = 220
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 9
+      Text = 'YEdit'
+    end
+    object SizeEdit: TEdit
+      AnchorSideLeft.Control = BubbleEdit
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = SizeOutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 264
+      Height = 23
+      Top = 262
+      Width = 220
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 12
+      Text = 'SizeEdit'
+    end
+  end
+  object ReturnBtn: TButton
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 427
+    Height = 25
+    Top = 421
+    Width = 61
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Return'
+    ModalResult = 1
+    TabOrder = 8
+  end
+  object ComputeBtn: TButton
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = ReturnBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 343
+    Height = 25
+    Top = 421
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 7
+  end
+  object ResetBtn: TButton
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 281
+    Height = 25
+    Top = 421
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 6
+  end
+  object HelpBtn: TButton
+    Tag = 110
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 222
+    Height = 25
+    Top = 421
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 5
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = ReturnBtn
+    Left = 0
+    Height = 8
+    Top = 405
+    Width = 500
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/bubbleplotunit.pas

@@ -0,0 +1,628 @@
+// Use file "bubbleplot2.laz" for testing.
+
+unit BubblePlotUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Clipbrd, Buttons, ExtCtrls, Math,
+  MainUnit, Globals, OutputUnit, DataProcs, DictionaryUnit, ContextHelpUnit;
+
+
+type
+
+  { TBubbleForm }
+
+  TBubbleForm = class(TForm)
+    Bevel1: TBevel;
+    HelpBtn: TButton;
+    Panel1: TPanel;
+    TransformChk: TCheckBox;
+    YLabelEdit: TEdit;
+    Label8: TLabel;
+    XLabelEdit: TEdit;
+    Label7: TLabel;
+    TitleEdit: TEdit;
+    Label6: TLabel;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    ReturnBtn: TButton;
+    IDInBtn: TBitBtn;
+    IDOutBtn: TBitBtn;
+    XInBtn: TBitBtn;
+    XOutBtn: TBitBtn;
+    YInBtn: TBitBtn;
+    YOutBtn: TBitBtn;
+    SizeInBtn: TBitBtn;
+    SizeOutBtn: TBitBtn;
+    BubbleEdit: TEdit;
+    SizeEdit: TEdit;
+    YEdit: TEdit;
+    XEdit: TEdit;
+    Label1: TLabel;
+    Label2: TLabel;
+    Label3: TLabel;
+    Label4: TLabel;
+    Label5: TLabel;
+    VarList: TListBox;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure IDInBtnClick(Sender: TObject);
+    procedure IDOutBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure SizeInBtnClick(Sender: TObject);
+    procedure SizeOutBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+    procedure XInBtnClick(Sender: TObject);
+    procedure XOutBtnClick(Sender: TObject);
+    procedure YInBtnClick(Sender: TObject);
+    procedure YOutBtnClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: boolean;
+    procedure UpdateBtnStates;
+  public
+    { public declarations }
+  end; 
+
+var
+  BubbleForm: TBubbleForm;
+
+implementation
+
+uses
+  BlankFrmUnit;
+
+{ TBubbleForm }
+
+procedure TBubbleForm.IDInBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while (BubbleEdit.Text = '') and (i < VarList.Items.Count) do
+  begin
+    if (VarList.Selected[i]) then
+    begin
+      BubbleEdit.Text := VarList.Items[i];
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TBubbleForm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).Tag);
+end;
+
+procedure TBubbleForm.ComputeBtnClick(Sender: TObject);
+var
+  BubbleCol, XCol, YCol, SizeCol, i, j, LabelWide, TextHi, Xpos: integer;
+  ImageWide, ImageHi, Xstart, Xend, Ystart, Yend, Yincr, cell: integer;
+  Xmin, Xmax, Xrange, Xstep, intcell, noreplications, minrep, maxrep: integer;
+  nobubbles, yprop: integer;
+  varname, Xlabel, Ylabel, astring, Title: string;
+  Ymin, Ymax, Yrange, Ystep, cellvalue, xvalue: double;
+  BubMin, BubMax, BubRange, ratio, value: double;
+  valstr: string;
+  BubColor, place: integer;
+  X1, Y1, X2, Y2: integer;
+  dx, dy: Integer;
+  Data: DblDyneMat;
+  ncases, ncols, BubbleID, newcol : integer;
+  GrandYMean, GrandSizeMean, sizevalue, yvalue: double;
+  Ymeans: DblDyneVec;
+  CaseYMeans: DblDyneVec;
+  SizeMeans: DblDyneVec;
+  CaseSizeMeans: DblDyneVec;
+  outline: string;
+  labels: StrDyneVec;
+  lReport: TStrings;
+begin
+  BubbleCol := 0;
+  XCol := 0;
+  YCol := 0;
+  SizeCol := 0;
+  for i := 1 to NoVariables do
+  begin
+    varname := OS3MainFrm.DataGrid.Cells[i,0];
+    if (varname = BubbleEdit.Text) then BubbleCol := i;
+    if (varname = XEdit.Text) then XCol := i;
+    if (varname = YEdit.Text) then YCol := i;
+    if (varname = SizeEdit.Text) then SizeCol := i;
+  end;
+  if ((BubbleCol = 0) or (XCol = 0) or (YCol = 0) or (SizeCol = 0)) then
+  begin
+    MessageDlg('One or more variables not found.', mtError, [mbOK], 0);
+    ModalResult := mrNone;
+    Exit;
+  end;
+
+  // get number of bubbles and replications per bubble (number of bubble id's)
+  minrep := 1000;
+  maxrep := -1;
+  for i := 1 to NoCases do
+  begin
+    intcell := StrToInt(OS3MainFrm.DataGrid.Cells[BubbleCol,i]);
+    if (intcell > maxrep) then maxrep := intcell;
+    if (intcell < minrep) then minrep := intcell;
+  end;
+  nobubbles := maxrep - minrep + 1;
+  noreplications := 1;
+  intcell := StrToInt(OS3MainFrm.DataGrid.Cells[BubbleCol,1]);
+  for i := 2 to NoCases do
+  begin
+    cell := StrToInt(OS3MainFrm.DataGrid.Cells[BubbleCol,i]);
+    if (cell = intcell) then noreplications := noreplications + 1;
+  end;
+
+  // get min, max and range of Y
+  Ymin := 1.0e308;
+  Ymax := -1.0e308;
+  for i := 1 to NoCases do
+  begin
+    cellvalue := StrToFloat(OS3MainFrm.DataGrid.Cells[YCol,i]);
+    if (cellvalue > Ymax) then Ymax := cellvalue;
+    if (cellvalue < Ymin) then Ymin := cellvalue;
+  end;
+  Yrange := Ymax - Ymin;
+  Ystep := Yrange / 10;
+
+  // get min, max and range of X
+  Xmin := 10000;
+  Xmax := -1;
+  for i := 1 to NoCases do
+  begin
+    intcell := StrToInt(OS3MainFrm.DataGrid.Cells[XCol,i]);
+    if (intcell > Xmax) then Xmax := intcell;
+    if (intcell < Xmin) then Xmin := intcell;
+  end;
+  Xrange := Xmax - Xmin;
+  Xstep := Xrange div (noreplications-1);
+
+  // get min, max, range, and increment of bubble sizes
+  BubMin := 1.0e308;
+  BubMax := -1.0e308;
+  for i := 1 to NoCases do
+  begin
+    cellvalue := StrToFloat(OS3MainFrm.DataGrid.Cells[SizeCol,i]);
+    if (cellvalue > BubMax) then BubMax := cellvalue;
+    if (cellvalue < BubMin) then BubMin := cellvalue;
+  end;
+  BubRange := BubMax - BubMin;
+
+  // Display basic statistics
+  ncases := NoCases div noreplications;
+  GrandYMean := 0.0;
+  GrandSizeMean := 0.0;
+  SetLength(CaseYMeans,ncases);
+  SetLength(CaseSizeMeans,ncases);
+  SetLength(Ymeans,noreplications);
+  SetLength(SizeMeans,noreplications);
+  for i := 0 to ncases - 1 do
+  begin
+    CaseYMeans[i] := 0.0;
+    CaseSizeMeans[i] := 0.0;
+  end;
+  for i := 0 to noreplications - 1 do
+  begin
+    Ymeans[i] := 0.0;
+    SizeMeans[i] := 0.0;
+  end;
+
+  i := 1;
+  while (i <= NoCases) do
+  begin
+    for j := 1 to noreplications do
+    begin
+      bubbleID := StrToInt(OS3MainFrm.DataGrid.Cells[BubbleCol,i]);
+      yvalue := StrToFloat(OS3MainFrm.DataGrid.Cells[YCol,i]);
+      sizevalue := StrToFloat(OS3MainFrm.DataGrid.Cells[SizeCol,i]);
+      GrandYMean := GrandYMean + yvalue;
+      GrandSizeMean := GrandSizeMean + sizevalue;
+      Ymeans[j-1] := Ymeans[j-1] + yvalue;
+      SizeMeans[j-1] := SizeMeans[j-1] + sizevalue;
+      CaseYMeans[bubbleID-1] := CaseYMeans[bubbleID-1] + yvalue;
+      CaseSizeMeans[bubbleID-1] := CaseSizeMeans[bubbleID-1] + sizevalue;
+      inc(i);
+    end;
+  end;
+
+  GrandYMean := GrandYMean / (ncases * noreplications);
+  GrandSizeMean := GrandSizeMean  / (ncases * noreplications);
+  for j := 0 to noreplications - 1 do
+  begin
+    Ymeans[j] := Ymeans[j] / ncases;
+    SizeMeans[j] := SizeMeans[j] / ncases;
+  end;
+  for i := 0 to ncases - 1 do
+  begin
+    CaseYMeans[i] := CaseYMeans[i] / noreplications;
+    CaseSizeMeans[i] := CaseSizeMeans[i] / noreplications;
+  end;
+
+  lReport := TStringList.Create;
+  try
+    lReport.Add('MEANS FOR Y AND SIZE VARIABLES');
+    lReport.Add('');
+    lReport.Add('Grand Mean for Y := %8.3f', [GrandYMean]);
+    lReport.Add('Grand Mean for Size := %8.3f', [GrandSizeMean]);
+    lReport.Add('');
+    lReport.Add('REPLICATION MEAN Y VALUES (ACROSS OBJECTS)');
+    for j := 0 to noreplications - 1 do
+      lReport.Add('Replication %5d Mean := %8.3f', [j+1, Ymeans[j]]);
+    lReport.Add('');
+    lReport.Add('REPLICATION MEAN SIZE VALUES (ACROSS OBJECTS)');
+    for j := 0 to noreplications - 1 do
+      lReport.Add('Replication %5d Mean := %8.3f', [j+1, SizeMeans[j]]);
+    lReport.Add('');
+    lReport.Add('MEAN Y VALUES FOR EACH BUBBLE (OBJECT)');
+    for i := 0 to ncases - 1 do
+      lReport.Add('Object %5d Mean := %8.3f', [i+1, CaseYMeans[i]]);
+    lReport.Add('');
+    lReport.Add('MEAN SIZE VALUES FOR EACH BUBBLE (OBJECT)');
+    for i := 0 to ncases - 1 do
+       lReport.Add('Object %5d Mean := %8.3f', [i+1, CaseSizeMeans[i]]);
+
+    DisplayReport(lReport);
+
+  finally
+    lReport.Free;
+    SizeMeans := nil;
+    Ymeans := nil;
+    CaseSizeMeans := nil;
+    CaseYMeans := nil;
+  end;
+
+//--------------------------------------------------------------------------
+// Plotting Section
+//---------------------------------------------------------------------------
+  //BlankFrm.Image1.Canvas.Clear;
+  BlankFrm.Show;
+  BlankFrm.Caption := 'BUBBLE PLOT of ' + OS3MainFrm.FileNameEdit.Text;
+  Xlabel := XlabelEdit.Text;
+  Ylabel := YlabelEdit.Text;
+  Title := TitleEdit.Text;
+  ImageHi := BlankFrm.Image1.Height;
+  ImageWide := BlankFrm.Image1.Width;
+  Xstart := ImageWide div 10;
+  Xend := (ImageWide * 9) div 10;
+  Ystart := ImageHi div 10;
+  Yend := (ImageHi * 8) div 10;
+  BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+  BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+  BlankFrm.Image1.Canvas.Rectangle(0,0,ImageWide,ImageHi);
+  BlankFrm.Image1.Canvas.FloodFill(0,0,clWhite,fsBorder);
+  BlankFrm.Image1.Canvas.TextOut(Xstart-10,Ystart-30,Ylabel);
+  LabelWide := BlankFrm.Image1.Canvas.TextWidth(Xlabel);
+  BlankFrm.Image1.Canvas.TextOut((Xend-Xstart) div 2 - LabelWide,Yend + 40,Xlabel);
+  LabelWide := BlankFrm.Image1.Canvas.TextWidth(Title);
+  BlankFrm.Image1.Canvas.TextOut((Xend-Xstart) div 2 - LabelWide div 2, Ystart - 40,Title);
+
+  // draw axis lines
+  BlankFrm.Image1.Canvas.MoveTo(Xstart,Yend);
+  BlankFrm.Image1.Canvas.LineTo(Xend,Yend);
+  BlankFrm.Image1.Canvas.MoveTo(Xstart,Yend);
+  BlankFrm.Image1.Canvas.LineTo(Xstart,Ystart);
+
+  // create y axis values
+  Yincr := (Yend - Ystart) div 10;
+  for i := 0 to 10 do  // print Y axis values
+  begin
+    place := Yend - (i * Yincr);
+    value := Ymin + (Ystep * i);
+    valstr := format('%.2f',[value]);
+    astring := valstr;
+    TextHi := BlankFrm.Image1.Canvas.TextHeight(astring);
+    BlankFrm.Image1.Canvas.TextOut(Xstart-30,place-TextHi,astring);
+  end;
+
+  // create x axis values
+  for i := 1 to noreplications do  // print x axis
+  begin
+    value := Xmin + ((i-1) * Xstep);
+    ratio := i / noreplications;
+    Xpos := round(ratio * (Xend - Xstart));
+    valstr := format('%.0f',[value]);
+    astring := valstr;
+    BlankFrm.Image1.Canvas.TextOut(Xpos,Yend + 20,astring);
+  end;
+
+  // Plot the bubbles
+  for i := 1 to NoCases do
+  begin
+    intcell := StrToInt(OS3MainFrm.DataGrid.Cells[BubbleCol,i]);
+    xvalue := StrToFloat(OS3MainFrm.DataGrid.Cells[XCol,i]);
+    cellvalue := StrToFloat(OS3MainFrm.DataGrid.Cells[YCol,i]);
+    yprop := Yend - round(((cellvalue-Ymin) / Yrange) * (Yend - Ystart));
+    cellvalue := StrToFloat(OS3MainFrm.DataGrid.Cells[SizeCol,i]);
+    astring := Trim(OS3MainFrm.DataGrid.Cells[BubbleCol,i]);
+    cellvalue := ((cellvalue - BubMin) / BubRange) * 20;
+    cellvalue := cellvalue + 10;
+    ratio := ((xvalue - Xmin) / Xstep) + 1;
+    ratio := (ratio / noreplications) * (Xend - Xstart);
+    Xpos := ceil(ratio);
+    BubColor := intcell - 1;
+    while (Bubcolor > 11) do Bubcolor := 12 - Bubcolor;
+    BlankFrm.Image1.Canvas.Brush.Color := DATA_COLORS[Bubcolor];
+    X1 := Xpos - ceil(cellvalue);
+    Y1 := yprop - ceil(cellvalue);
+    X2 := Xpos + ceil(cellvalue);
+    Y2 := yprop + ceil(cellvalue);
+    BlankFrm.Image1.Canvas.Ellipse(X1,Y1,X2,Y2);
+    BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+    dx := BlankFrm.Image1.Canvas.TextWidth(astring) div 2;
+    dy := BlankFrm.Image1.Canvas.TextHeight(astring) div 2;
+    BlankFrm.Image1.Canvas.TextOut(Xpos-dx, yprop-dy, astring);
+  end;
+
+  // Transform data matrix if elected
+  if (TransformChk.Checked = true) then
+  begin
+    ncases := nobubbles;
+    ncols := noreplications * 3 + 1;
+
+    // Note - columns: 1:=object ID, 2 to noreplications := X,
+    // next noreplications := Y, next noreplications := size
+    SetLength(Data,ncases,ncols);
+    i := 1;
+    while (i <= NoCases) do
+    begin
+      for j := 1 to noreplications do
+      begin
+        bubbleID := StrToInt(OS3MainFrm.DataGrid.Cells[BubbleCol,i]);
+        xvalue := StrToFloat(OS3MainFrm.DataGrid.Cells[XCol,i]);
+        yvalue := StrToFloat(OS3MainFrm.DataGrid.Cells[YCol,i]);
+        sizevalue := StrToFloat(OS3MainFrm.DataGrid.Cells[SizeCol,i]);
+        Data[bubbleID-1,0] := bubbleID;
+        Data[bubbleID-1,j] := xvalue;
+        Data[bubbleID-1,noreplications+j] := yvalue;
+        Data[bubbleID-1,noreplications*2+j] := sizevalue;
+        inc(i);
+      end;
+    end;
+
+    SetLength(labels,NoVariables+1);
+    for i := 1 to NoVariables do labels[i] := OS3MainFrm.DataGrid.Cells[i,0];
+    ClearGrid;
+    OS3MainFrm.DataGrid.RowCount := ncases + 1;
+    OS3MainFrm.DataGrid.ColCount := ncols + 1;
+
+    for i := 1 to ncases do
+    begin
+      OS3MainFrm.DataGrid.Cells[0,i] := IntToStr(i);
+      for j := 1 to ncols do
+        OS3MainFrm.DataGrid.Cells[j,i] := FloatToStr(Data[i-1,j-1]);
+    end;
+    OS3MainFrm.DataGrid.Cells[1,0] := labels[1];
+
+    for j := 2 to NoVariables do // clear dictionary
+    begin
+      for i := 0 to 7 do DictionaryFrm.DictGrid.Cells[i,j] := '';
+      DictionaryFrm.DictGrid.RowCount := DictionaryFrm.DictGrid.RowCount - 1;
+      VarDefined[j] := false;
+    end;
+    DictionaryFrm.DictGrid.Cells[1,1] := labels[1];
+
+    for j := 1 to noreplications do
+    begin
+      outline := labels[2] + IntToStr(j);
+      newcol := j + 1;
+      if (newcol+1 > DictionaryFrm.DictGrid.RowCount) then
+        DictionaryFrm.DictGrid.RowCount := DictionaryFrm.DictGrid.RowCount + 1;
+      DictionaryFrm.Defaults(Self,newcol);
+      VarDefined[newcol] := true;
+      DictionaryFrm.DictGrid.Cells[1,newcol] := outline;
+      OS3MainFrm.DataGrid.Cells[newcol,0] := outline;
+    end;
+
+    for j := 1 to noreplications do
+    begin
+      outline := labels[3] + IntToStr(j);
+      newcol := j + 1 + noreplications;
+      OS3MainFrm.DataGrid.Cells[newcol,0] := outline;
+      if (newcol+1 > DictionaryFrm.DictGrid.RowCount) then
+        DictionaryFrm.DictGrid.RowCount := DictionaryFrm.DictGrid.RowCount + 1;
+      DictionaryFrm.Defaults(Self,newcol);
+      VarDefined[newcol] := true;
+      DictionaryFrm.DictGrid.Cells[1,newcol] := outline;
+    end;
+
+    for j := 1 to noreplications do
+    begin
+      outline := labels[4] + IntToStr(j);
+      newcol := j + 1 + noreplications * 2;
+      OS3MainFrm.DataGrid.Cells[newcol,0] := outline;
+
+      if (newcol+1 > DictionaryFrm.DictGrid.RowCount) then
+        DictionaryFrm.DictGrid.RowCount := DictionaryFrm.DictGrid.RowCount + 1;
+      DictionaryFrm.Defaults(Self,newcol);
+      VarDefined[newcol] := true;
+
+      DictionaryFrm.DictGrid.Cells[1,newcol] := outline;
+    end;
+
+    NoVariables := ncols;
+    NoCases := ncases;
+    OS3MainFrm.NoCasesEdit.Text := IntToStr(NoCases);
+    OS3MainFrm.NoVarsEdit.Text := IntToStr(NoVariables);
+    Data := nil;
+    labels := nil;
+  end;
+end;
+
+procedure TBubbleForm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, ComputeBtn.Width, ReturnBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  ReturnBtn.Constraints.MinWidth := w;
+
+  Panel1.Constraints.MinHeight := SizeOutBtn.Top + SizeOutBtn.Height;
+  Panel1.Constraints.MinWidth := 2*Label2.Width + IDInBtn.Width + 2*VarList.BorderSpacing.Right;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := True;
+end;
+
+procedure TBubbleForm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if DictionaryFrm = nil then Application.CreateForm(TDictionaryFrm, DictionaryFrm);
+  if BlankFrm = nil then Application.CreateForm(TBlankFrm, BlankFrm);
+end;
+
+procedure TBubbleForm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TBubbleForm.IDOutBtnClick(Sender: TObject);
+begin
+  if BubbleEdit.Text <> '' then
+    VarList.Items.Add(BubbleEdit.Text);
+  UpdateBtnStates;
+end;
+
+procedure TBubbleForm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  BubbleEdit.Text := '';
+  XEdit.Text := '';
+  YEdit.Text := '';
+  SizeEdit.Text := '';
+  VarList.Clear;
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  UpdateBtnStates;
+end;
+
+procedure TBubbleForm.SizeInBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while (SizeEdit.Text = '') and (i < VarList.Items.Count) do
+  begin
+    if VarList.Selected[i] then
+    begin
+      SizeEdit.Text := VarList.Items[i];
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TBubbleForm.SizeOutBtnClick(Sender: TObject);
+begin
+  if SizeEdit.Text <> '' then
+     VarList.Items.Add(SizeEdit.Text);
+  UpdateBtnStates;
+end;
+
+procedure TBubbleForm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+procedure TBubbleForm.XInBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while (XEdit.Text = '') and (i < VarList.Items.Count) do
+  begin
+    if VarList.Selected[i] then
+    begin
+      XEdit.Text := VarList.Items[i];
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TBubbleForm.XOutBtnClick(Sender: TObject);
+begin
+  if XEdit.Text <> '' then
+    VarList.Items.Add(XEdit.Text);
+  UpdateBtnStates;
+end;
+
+procedure TBubbleForm.YInBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while (YEdit.Text = '') and (i < VarList.Items.Count) do
+  begin
+    if VarList.Selected[i] then
+    begin
+      YEdit.Text := VarList.Items[i];
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TBubbleForm.YOutBtnClick(Sender: TObject);
+begin
+  if YEdit.Text <> '' then
+    VarList.Items.Add(YEdit.Text);
+  UpdateBtnStates;
+end;
+
+procedure TBubbleForm.UpdateBtnStates;
+var
+  i: Integer;
+  lSelected: Boolean;
+begin
+  lSelected := false;
+  for i:=0 to VarList.Count-1 do
+    if VarList.Selected[i] then
+    begin
+      lSelected := true;
+      break;
+    end;
+
+  IDInBtn.Enabled := lSelected and (BubbleEdit.Text = '');
+  XInBtn.Enabled := lSelected and (XEdit.Text = '');
+  YInBtn.Enabled := lSelected and (YEdit.Text = '');
+  SizeInBtn.Enabled := lSelected and (SizeEdit.Text = '');
+  IDOutBtn.Enabled := BubbleEdit.Text <> '';
+  XOutBtn.Enabled := XEdit.Text <> '';
+  YOutBtn.Enabled := YEdit.Text <> '';
+  SizeOutBtn.Enabled := SizeEdit.Text <> '';
+end;
+
+
+initialization
+  {$I bubbleplotunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/comparedistunit.lfm

@@ -0,0 +1,398 @@
+object CompareDistFrm: TCompareDistFrm
+  Left = 462
+  Height = 375
+  Top = 227
+  Width = 516
+  AutoSize = True
+  Caption = 'Compare Cumulative Distributions'
+  ClientHeight = 375
+  ClientWidth = 516
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object CompareGroup: TRadioGroup
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 326
+    Height = 72
+    Top = 8
+    Width = 182
+    Anchors = [akTop, akRight]
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'Compare To:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 52
+    ClientWidth = 178
+    ItemIndex = 0
+    Items.Strings = (
+      'A Theoretical Distribution'
+      'Another Variable'
+    )
+    OnClick = CompareGroupClick
+    TabOrder = 2
+  end
+  object DistGroup: TRadioGroup
+    AnchorSideLeft.Control = CompareGroup
+    AnchorSideTop.Control = CompareGroup
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 326
+    Height = 135
+    Top = 96
+    Width = 182
+    Anchors = [akTop, akLeft, akRight]
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Top = 16
+    BorderSpacing.Right = 8
+    Caption = 'Theoretical Distributions:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 115
+    ClientWidth = 178
+    Items.Strings = (
+      'Normal Distribution'
+      't-Distribution'
+      'Chi Square Distribution'
+      'F Distribution'
+      'Poisson Distribution'
+    )
+    OnClick = DistGroupClick
+    TabOrder = 3
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 299
+    Height = 25
+    Top = 342
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 5
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 365
+    Height = 25
+    Top = 342
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 6
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 453
+    Height = 25
+    Top = 342
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 7
+  end
+  object PlotTypeGrp: TGroupBox
+    AnchorSideLeft.Control = CompareGroup
+    AnchorSideTop.Control = DistGroup
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 326
+    Height = 74
+    Top = 247
+    Width = 182
+    Anchors = [akTop, akLeft, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 16
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Plot Type:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 54
+    ClientWidth = 178
+    TabOrder = 4
+    object PointsChk: TRadioButton
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 67
+      BorderSpacing.Left = 12
+      Caption = '3DPoints'
+      Checked = True
+      TabOrder = 0
+      TabStop = True
+    end
+    object LinesChk: TRadioButton
+      Left = 12
+      Height = 19
+      Top = 27
+      Width = 67
+      BorderSpacing.Left = 12
+      BorderSpacing.Bottom = 8
+      Caption = '3DLines'
+      TabOrder = 1
+    end
+  end
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 47
+    Top = 279
+    Width = 298
+    Anchors = [akLeft, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    Caption = 'Option:'
+    ClientHeight = 27
+    ClientWidth = 294
+    TabOrder = 1
+    object BothChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 0
+      Width = 270
+      BorderSpacing.Left = 12
+      BorderSpacing.Right = 12
+      BorderSpacing.Bottom = 8
+      Caption = 'Plot both Frequency and cumulative Frequency'
+      TabOrder = 0
+    end
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = ResetBtn
+    Left = 0
+    Height = 8
+    Top = 326
+    Width = 516
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = CompareGroup
+    AnchorSideBottom.Control = GroupBox1
+    Left = 8
+    Height = 263
+    Top = 8
+    Width = 310
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    BevelOuter = bvNone
+    ClientHeight = 263
+    ClientWidth = 310
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Panel1
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 49
+      Caption = 'Variables:'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Label1
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = VerticalCenterBevel
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 246
+      Top = 17
+      Width = 150
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      ItemHeight = 0
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 0
+    end
+    object Var1InBtn: TBitBtn
+      AnchorSideLeft.Control = VerticalCenterBevel
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideBottom.Control = Var1OutBtn
+      Left = 160
+      Height = 28
+      Top = 53
+      Width = 28
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = Var1InBtnClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object Var1OutBtn: TBitBtn
+      AnchorSideLeft.Control = Var1InBtn
+      AnchorSideBottom.Control = VerticalCenterBevel
+      Left = 160
+      Height = 28
+      Top = 85
+      Width = 28
+      Anchors = [akLeft, akBottom]
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = Var1OutBtnClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object Var2InBtn: TBitBtn
+      AnchorSideLeft.Control = VerticalCenterBevel
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = VerticalCenterBevel
+      AnchorSideTop.Side = asrBottom
+      Left = 160
+      Height = 28
+      Top = 168
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = Var2InBtnClick
+      Spacing = 0
+      TabOrder = 3
+    end
+    object Var2OutBtn: TBitBtn
+      AnchorSideLeft.Control = Var2InBtn
+      AnchorSideTop.Control = Var2InBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 160
+      Height = 28
+      Top = 200
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = Var2OutBtnClick
+      Spacing = 0
+      TabOrder = 4
+    end
+    object Label2: TLabel
+      AnchorSideLeft.Control = VarOneEdit
+      AnchorSideBottom.Control = VarOneEdit
+      Left = 196
+      Height = 15
+      Top = 61
+      Width = 66
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 2
+      Caption = 'Variable One'
+      ParentColor = False
+    end
+    object Label3: TLabel
+      AnchorSideLeft.Control = VarTwoEdit
+      AnchorSideBottom.Control = VarTwoEdit
+      Left = 196
+      Height = 15
+      Top = 176
+      Width = 65
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 2
+      Caption = 'Variable Two'
+      ParentColor = False
+    end
+    object VarOneEdit: TEdit
+      AnchorSideLeft.Control = Var1InBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Var1OutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 196
+      Height = 23
+      Top = 78
+      Width = 114
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 5
+      Text = 'VarOneEdit'
+    end
+    object VarTwoEdit: TEdit
+      AnchorSideLeft.Control = Var2InBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Var2OutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 196
+      Height = 23
+      Top = 193
+      Width = 114
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 6
+      Text = 'Edit1'
+    end
+    object VerticalCenterBevel: TBevel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = VarList
+      AnchorSideTop.Side = asrCenter
+      Left = 150
+      Height = 55
+      Top = 113
+      Width = 10
+      Shape = bsSpacer
+    end
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/comparedistunit.pas

@@ -0,0 +1,594 @@
+// Use file "cansas.laz" for testing
+
+unit CompareDistUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Buttons, ExtCtrls,
+  OutputUnit, FunctionsLib, Globals, GraphLib, DataProcs, MainUnit;
+
+type
+
+  { TCompareDistFrm }
+
+  TCompareDistFrm = class(TForm)
+    Bevel1: TBevel;
+    LinesChk: TRadioButton;
+    PointsChk: TRadioButton;
+    VerticalCenterBevel: TBevel;
+    BothChk: TCheckBox;
+    GroupBox1: TGroupBox;
+    Panel1: TPanel;
+    PlotTypeGrp: TGroupBox;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    CloseBtn: TButton;
+    CompareGroup: TRadioGroup;
+    DistGroup: TRadioGroup;
+    VarOneEdit: TEdit;
+    VarTwoEdit: TEdit;
+    Label2: TLabel;
+    Label3: TLabel;
+    Var1InBtn: TBitBtn;
+    Var1OutBtn: TBitBtn;
+    Var2InBtn: TBitBtn;
+    Var2OutBtn: TBitBtn;
+    Label1: TLabel;
+    VarList: TListBox;
+    procedure CompareGroupClick(Sender: TObject);
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure DistGroupClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure Var1InBtnClick(Sender: TObject);
+    procedure Var1OutBtnClick(Sender: TObject);
+    procedure Var2InBtnClick(Sender: TObject);
+    procedure Var2OutBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+  private
+    { private declarations }
+    compareto: integer;
+    disttype: integer;
+    FAutoSized: Boolean;
+    procedure UpdateBtnStates;
+  public
+    { public declarations }
+  end; 
+
+var
+  CompareDistFrm: TCompareDistFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TCompareDistFrm }
+
+procedure TCompareDistFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+   if FAutoSized then
+     exit;
+
+   w := MaxValue([ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  Panel1.Constraints.MinWidth := Groupbox1.Width;
+  Panel1.Constraints.MinHeight := PlotTypeGrp.Top + PlotTypeGrp.Height - GroupBox1.Height - Panel1.BorderSpacing.Bottom - Panel1.Top;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TCompareDistFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if GraphFrm = nil then Application.CreateForm(TGraphFrm, GraphFrm);
+end;
+
+procedure TCompareDistFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(nil);
+end;
+
+procedure TCompareDistFrm.CompareGroupClick(Sender: TObject);
+begin
+  compareTo := CompareGroup.ItemIndex;
+  Label3.Enabled := (compareTo = 1);
+  VarTwoEdit.Enabled := (compareTo = 1);
+  Var2InBtn.Enabled := (compareTo = 1);
+  Var2OutBtn.Enabled := (compareTo = 1);
+end;
+
+procedure TCompareDistFrm.ComputeBtnClick(Sender: TObject);
+var
+  Var1Freq : IntDyneVec;
+  Var2Freq : IntDyneVec;
+  XValue1 : DblDyneVec;
+  XValue2 : DblDyneVec;
+  Cumfreq1 : DblDyneVec;
+  Cumfreq2 : DblDyneVec;
+  i, j, k, col1, col2, Ncases, noints : integer;
+  min1, max1, min2, max2, range1, range2, value : double;
+  incrsize1, incrsize2, prob1,prob2, KS, mean, DegFree : double;
+  cellval, name1, name2 : string;
+  df1, df2 : integer;
+  xtitle : string;
+  msg: String;
+  lReport: TStrings;
+begin
+  SetLength(Var1Freq, NoCases + 1);
+  SetLength(Var2Freq, NoCases + 1);
+  SetLength(XValue1,  NoCases + 1);
+  SetLength(XValue2,  NoCases + 1);
+  SetLength(Cumfreq1, NoCases + 1);
+  SetLength(Cumfreq2, NoCases + 1);
+
+  // Get columns of the variables
+  col1 := 0;
+  col2 := 0;
+  for i := 1 to NoVariables do
+  begin
+    if VarOneEdit.Text = OS3MainFrm.DataGrid.Cells[i,0] then col1 := i;
+    if compareto = 1 then
+    begin
+      if VarTwoEdit.Text = OS3MainFrm.DataGrid.Cells[i,0] then col2 := i;
+    end;
+  end;
+
+  msg := '';
+  case CompareTo of
+    0: if col1 = 0 then
+         msg := 'Variable not specified.';
+    1: if col1 = 0 then
+         msg := 'Variable One is not specified.'
+       else if col2 = 0 then
+         msg := 'Variable Two is not specified.';
+  end;
+  if msg <> '' then
+  begin
+    MessageDlg(msg, mtError, [mbOK], 0);
+    exit;
+  end;
+
+  // get min and max values for variable in col1
+  min1 := 1.0e308;
+  max1 := -1.0e308;
+  Ncases := 0;
+  for j := 1 to NoCases do
+  begin
+    if not ValidValue(j,col1) then continue;
+    value := StrToFloat(OS3MainFrm.DataGrid.Cells[col1,j]);
+    if value > max1 then max1 := value;
+    if value < min1 then min1 := value;
+    inc(Ncases);
+  end;
+
+  noints := NoCases - 1;   // number of intervals
+  if noints > 20 then noints := 20;
+  range1 := max1 - min1 + 1.0;
+  incrsize1 := range1 / noints;
+  name1 := VarOneEdit.Text;
+
+  if compareTo = 1 then
+  begin
+    min2 := 1.0e32;
+    max2 := -1.0e32;
+    for j := 1 to NoCases do
+    begin
+      if Not ValidValue(j,col2) then continue;
+      value := StrToFloat(OS3MainFrm.DataGrid.Cells[col2,j]);
+      if value > max2 then max2 := value;
+      if value < min2 then min2 := value;
+    end;
+    range2 := max2 - min2 + 1.0;
+    incrsize2 := range2 / noints;
+    name2 := VarTwoEdit.Text;
+  end;
+
+  //Now, get frequency of cases in each interval
+  for j := 1 to noints+1 do
+    Var1Freq[j-1] := 0;
+  for j := 1 to NoCases do
+  begin
+    if Not ValidValue(j,col1) then continue;
+    value := StrToFloat(OS3MainFrm.DataGrid.Cells[col1,j]);
+    for k := 1 to noints do
+    begin
+      if (value >= min1 + ((k-1) * incrsize1)) and
+         (value < min1 + (k * incrsize1))
+      then
+        Var1Freq[k-1] := Var1Freq[k-1] + 1;
+    end;
+  end;
+  Cumfreq1[0] := Var1Freq[0];
+  for j := 1 to noints+1 do
+    XValue1[j-1] := min1 + (j-1) * incrsize1;
+  for j := 1 to noints do
+    Cumfreq1[j] := Cumfreq1[j-1] + Var1Freq[j];
+  if compareTo = 1 then // do same for second variable
+  begin
+    for j := 1 to noints+1 do
+      Var2Freq[j-1] := 0;
+    for j := 1 to NoCases do
+    begin
+      if Not ValidValue(j,col2) then continue;
+      value := StrToFloat(OS3MainFrm.DataGrid.Cells[col2,j]);
+      for k := 1 to noints do
+      begin
+        if (value >= min2 + ((k-1) * incrsize2)) and
+           (value < min2 + (k * incrsize2))
+        then
+          Var2Freq[k-1] := Var2Freq[k-1] + 1;
+      end;
+    end;
+    Cumfreq2[0] := Var2Freq[0];
+    for j := 1 to noints+1 do
+      XValue2[j-1] := min2 + (j-1) * incrsize2;
+    for j := 1 to noints do
+      Cumfreq2[j] := Cumfreq2[j-1] + Var2Freq[j];
+  end;
+
+  // Get theoretical distribution frequencies for selected dist.
+  if compareTo = 0 then
+  begin
+    if DistGroup.ItemIndex = 0 then // normal curve
+    begin
+      name2 := 'Normal';
+      min2 := -3.0;
+      max2 := 3.0;
+      range2 := max2 - min2;
+      incrsize2 := range2 / noints;
+      Xvalue2[0] := min2;
+      Xvalue2[noints] := max2;
+      for i := 1 to noints do
+      begin
+        Xvalue2[i-1] := min2 + (i-1) * incrsize2;
+        Xvalue2[i] := min2 + (i) * incrsize2;
+        prob1 := probz(abs(Xvalue2[i-1]));
+        prob2 := probz(abs(Xvalue2[i]));
+        if prob1 > prob2 then
+          Var2Freq[i-1] := round((prob1-prob2) * Ncases)
+        else
+          Var2Freq[i-1] := round((prob2-prob1) * Ncases)
+      end;
+      Cumfreq2[0] := Var2Freq[0];
+      for i := 1 to noints do
+        Cumfreq2[i] := Cumfreq2[i-1] + Var2Freq[i];
+    end
+    else
+    if DistGroup.ItemIndex = 1 then // t-distribution
+    begin
+      name2 := 't-Dist.';
+      min2 := -3.0;
+      max2 := 3.0;
+      df1 := Ncases - 1;
+      range2 := max2 - min2;
+      incrsize2 := range2 / noints;
+      Xvalue2[0] := min2;
+      Xvalue2[noints] := max2;
+      for i := 1 to noints do
+      begin
+        Xvalue2[i-1] := min2 + (i-1) * incrsize2;
+        Xvalue2[i] := min2 + (i) * incrsize2;
+        prob1 := 0.5 * probt(Xvalue2[i-1],df1);
+        prob2 := 0.5 * probt(Xvalue2[i],df1);
+        if prob1 > prob2 then
+          Var2Freq[i-1] := round((prob1-prob2) * Ncases)
+        else
+          Var2Freq[i-1] := round((prob2-prob1) * Ncases)
+      end;
+      Cumfreq2[0] := Var2Freq[0];
+      for i := 1 to noints do
+        Cumfreq2[i] := Cumfreq2[i-1] + Var2Freq[i];
+    end
+    else
+    if DistGroup.ItemIndex = 2 then // chi squared distribution
+    begin
+      cellval := InputBox('Deg. Freedom 1 Entry','DF 1','');
+      df1 := StrToInt(cellval);
+      name2 := 'Chi Sqrd';
+      min2 := 0.0;
+      max2 := 20.0;
+      range2 := max2 - min2;
+      incrsize2 := range2 / noints;
+      Xvalue2[0] := min2;
+      Xvalue2[noints] := max2;
+      for i := 1 to noints do
+      begin
+        Xvalue2[i-1] := min2 + (i-1) * incrsize2;
+        Xvalue2[i] := min2 + (i) * incrsize2;
+        prob1 := chisquaredprob(Xvalue2[i-1],df1);
+        prob2 := chisquaredprob(Xvalue2[i],df1);
+        if prob1 > prob2 then
+          Var2Freq[i-1] := round((prob1-prob2) * Ncases)
+        else
+          Var2Freq[i-1] := round((prob2-prob1) * Ncases)
+      end;
+      Cumfreq2[0] := Var2Freq[0];
+      for i := 1 to noints do
+        Cumfreq2[i] := Cumfreq2[i-1] + Var2Freq[i];
+    end
+    else
+    if DistGroup.ItemIndex = 3 then // F distribution
+    begin
+      // get degrees of freedom
+      cellval := InputBox('Deg. Freedom 1 Entry','DF 1','');
+      df1 := StrToInt(cellval);
+      cellval := InputBox('Deg. Freedom 2 Entry','DF 2','');
+      df2 := StrToInt(cellval);
+      name2 := 'F Dist.';
+      min2 := 0.0;
+      max2 := 3.0;
+      range2 := max2 - min2;
+      incrsize2 := range2 / noints;
+      Xvalue2[0] := min2;
+      Xvalue2[noints] := max2;
+      for i := 1 to noints do
+      begin
+        Xvalue2[i-1] := min2 + (i-1) * incrsize2;
+        Xvalue2[i] := min2 + (i) * incrsize2;
+        prob1 := probf(Xvalue2[i-1],df1,df2);
+        prob2 := probf(Xvalue2[i],df1,df2);
+        if prob1 > prob2 then
+          Var2Freq[i-1] := round((prob1-prob2) * Ncases)
+        else
+          Var2Freq[i-1] := round((prob2-prob1) * Ncases)
+      end;
+      Cumfreq2[0] := Var2Freq[0];
+      for i := 1 to noints do
+        Cumfreq2[i] := Cumfreq2[i-1] + Var2Freq[i];
+    end
+    else
+    if DistGroup.ItemIndex = 4 then // Poisson distribution
+    begin
+      name2 := 'Poisson';
+      mean := 0; // use as parameter a in pdf call
+      min2 := min1;
+      max2 := max1;
+      if max2 > 13 then
+      begin
+        MessageDlg('Value > 13 found. Factorial too large - exiting.', mtError, [mbOK], 0);
+        exit;
+      end;
+      for i := 1 to Ncases do
+        mean := mean + StrToFloat(OS3MainFrm.DataGrid.Cells[col1,i]);
+      mean := mean / Ncases;
+      cellval := IntToStr(round(mean));
+      cellval := InputBox('Parameter Entry (mean)','DF 1',cellval);
+      degfree := StrToFloat(cellval);
+      range2 := max2 - min2;
+      incrsize2 := range2 / noints;
+//             Xvalue2[0] := min2;
+      Xvalue2[noints] := max2;
+      for i := 1 to noints do
+      begin
+        Xvalue2[i-1] := min2 + (i-1) * incrsize2;
+        Xvalue2[i] := min2 + (i) * incrsize2;
+        poisson_pdf ( round(Xvalue2[i-1]), degfree, prob1 );
+//                  prob1 := (Xvalue2[i-1],df1);
+//                  prob2 := chisquaredprob(Xvalue2[i],df1);
+//                  if prob1 > prob2 then
+       Var2Freq[i-1] := round((prob1) * Ncases);
+//                  else Var2Freq[i-1] := round((prob2-prob1) * Ncases)
+      end;
+      Cumfreq2[0] := Var2Freq[0];
+      for i := 1 to noints do
+        Cumfreq2[i] := Cumfreq2[i-1] + Var2Freq[i];
+    end;
+  end;
+
+  lReport := TStringList.Create;
+  try
+    lReport.Add('DISTRIBUTION COMPARISON by Bill Miller');
+    lReport.Add('');
+    lReport.Add('%10s   %10s   %10s   %10s   %10s   %10s', [
+      name1, name1, name1, name2, name2, name2
+    ]);
+    lReport.Add('%10s   %10s   %10s   %10s   %10s   %10s', [
+      'X1 Value','Frequency','Cum. Freq.','X2 Value','Frequency','Cum. Freq.'
+    ]);
+    for i := 1 to noints do
+      lReport.Add('%10.3f   %10d   %10.3f   %10.3f   %10d   %10.3f', [
+        XValue1[i-1],Var1Freq[i-1],Cumfreq1[i-1],XValue2[i-1],Var2Freq[i-1],Cumfreq2[i-1]
+      ]);
+    cellval := 'D';
+    KS := KolmogorovTest(noints, Cumfreq1,noints, Cumfreq2, cellval);
+  // lReport.Add('Kolmogorov-Smirnov statistic := %5.3f', [KS]);
+
+    DisplayReport(lReport);
+  finally
+    lReport.Free;
+  end;
+
+  // plot the cdfs
+  xtitle := 'Red = ' + VarOneEdit.Text + ' Blue = ' + name2;
+  cellval := 'Plot of Cumulative Distributions';
+  if LinesChk.Checked then
+    GraphFrm.barwideprop := 1.0
+  else
+    GraphFrm.barwideprop := 0.5;
+
+  GraphFrm.nosets := 2;
+  GraphFrm.nbars := noints+1;
+  GraphFrm.Heading := cellval;
+  GraphFrm.XTitle := xtitle;
+  GraphFrm.YTitle := 'Frequency';
+  SetLength(GraphFrm.Ypoints,2,noints+1);
+  SetLength(GraphFrm.Xpoints,1,noints+1);
+  for k := 1 to noints+1 do
+  begin
+    GraphFrm.Ypoints[0,k-1] := Cumfreq1[k-1];
+    GraphFrm.Ypoints[1,k-1] := CumFreq2[k-1];
+    GraphFrm.Xpoints[0,k-1] := k;
+  end;
+  GraphFrm.AutoScaled := true;
+  if LinesChk.Checked then
+    GraphFrm.GraphType := 6 // 3d lines
+  else
+    GraphFrm.GraphType := 8;  // 3D points
+  GraphFrm.BackColor := clYellow;
+  GraphFrm.WallColor := clBlue;
+  GraphFrm.FloorColor := clGray;
+  GraphFrm.ShowLeftWall := true;
+  GraphFrm.ShowRightWall := true;
+  GraphFrm.ShowBottomWall := true;
+  GraphFrm.ShowBackWall := true;
+  GraphFrm.ShowModal;
+  GraphFrm.Xpoints := nil;
+  GraphFrm.Ypoints := nil;
+
+  if BothChk.Checked then // plot the frequencies
+  begin
+    xtitle := 'Red = ' + VarOneEdit.Text + ' Blue = ' + name2;
+    cellval := 'Plot of Cumulative Distributions';
+    if LinesChk.Checked then
+      GraphFrm.BarWideProp := 1.0
+    else
+      GraphFrm.BarWideProp := 0.5;
+    GraphFrm.nosets := 2;
+    GraphFrm.nbars := noints+1;
+    GraphFrm.Heading := cellval;
+    GraphFrm.XTitle := xtitle;
+    GraphFrm.YTitle := 'Frequency';
+    SetLength(GraphFrm.Ypoints,2,noints+1);
+    SetLength(GraphFrm.Xpoints,1,noints+1);
+    for k := 1 to noints+1 do
+    begin
+      GraphFrm.Ypoints[0,k-1] := Var1Freq[k-1];
+      GraphFrm.Ypoints[1,k-1] := Var2Freq[k-1];
+      GraphFrm.Xpoints[0,k-1] := k;
+    end;
+    GraphFrm.AutoScaled := true;
+    if LinesChk.Checked then
+      GraphFrm.GraphType := 6 // 3d lines
+    else
+      GraphFrm.GraphType := 8;  // 3D points
+    GraphFrm.BackColor := clYellow;
+    GraphFrm.WallColor := clBlue;
+    GraphFrm.FloorColor := clGray;
+    GraphFrm.ShowLeftWall := true;
+    GraphFrm.ShowRightWall := true;
+    GraphFrm.ShowBottomWall := true;
+    GraphFrm.ShowBackWall := true;
+    GraphFrm.ShowModal;
+    GraphFrm.Xpoints := nil;
+    GraphFrm.Ypoints := nil;
+  end;
+
+  // clean up
+  Cumfreq2 := nil;
+  Cumfreq1 := nil;
+  XValue1 := nil;
+  XValue2 := nil;
+  Var2Freq := nil;
+  Var1Freq := nil;
+end;
+
+procedure TCompareDistFrm.DistGroupClick(Sender: TObject);
+begin
+  disttype := DistGroup.ItemIndex;
+end;
+
+procedure TCompareDistFrm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  VarList.Clear;
+  VarOneEdit.Text := '';
+  VarTwoEdit.Text := '';
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  Label3.Enabled := false;
+  CompareGroup.ItemIndex := 0;
+  DistGroup.ItemIndex := 0;
+  LinesChk.Checked := false;
+  PointsChk.Checked := true;
+end;
+
+procedure TCompareDistFrm.Var1InBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while (VarOneEdit.Text = '') and (i < VarList.Items.Count) do
+  begin
+    if VarList.Selected[i] then
+    begin
+      VarOneEdit.Text := VarList.Items[i];
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TCompareDistFrm.Var1OutBtnClick(Sender: TObject);
+begin
+  if VarOneEdit.Text <> '' then
+  begin
+    VarList.Items.Add(VarOneEdit.Text);
+    VarOneEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TCompareDistFrm.Var2InBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while (VarTwoEdit.Text = '') and (i < VarList.Items.Count) do
+  begin
+    if VarList.Selected[i] then
+    begin
+      VarTwoEdit.Text := VarList.Items[i];
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TCompareDistFrm.Var2OutBtnClick(Sender: TObject);
+begin
+  if VarTwoEdit.Text <> '' then
+  begin
+    VarList.Items.Add(VarTwoEdit.Text);
+    VarTwoEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TCompareDistFrm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+procedure TCompareDistFrm.UpdateBtnStates;
+begin
+  Var1InBtn.Enabled := (VarList.ItemIndex > -1) and (VarOneEdit.Text = '');
+  Var2InBtn.Enabled := (VarList.ItemIndex > -1) and (VarTwoEdit.Text = '');
+  Var1OutBtn.Enabled := VarOneEdit.Text <> '';
+  Var2OutBtn.Enabled := VarTwoEdit.Text <> '';
+end;
+
+initialization
+  {$I comparedistunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/crosstabunit.lfm

@@ -0,0 +1,218 @@
+object CrossTabFrm: TCrossTabFrm
+  Left = 459
+  Height = 347
+  Top = 230
+  Width = 421
+  AutoSize = True
+  Caption = 'Cross Tabulation'
+  ClientHeight = 347
+  ClientWidth = 421
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Panel2: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel2
+    Left = 8
+    Height = 290
+    Top = 8
+    Width = 405
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BevelOuter = bvNone
+    ClientHeight = 290
+    ClientWidth = 405
+    Constraints.MinHeight = 200
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideLeft.Control = Panel2
+      AnchorSideTop.Control = Panel2
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 97
+      Caption = 'Available Variables'
+      ParentColor = False
+    end
+    object Label2: TLabel
+      AnchorSideLeft.Control = SelList
+      AnchorSideTop.Control = Panel2
+      Left = 224
+      Height = 15
+      Top = 0
+      Width = 104
+      Caption = 'Variables to Analyze'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel2
+      AnchorSideTop.Control = Label1
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = InBtn
+      AnchorSideBottom.Control = Panel2
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 273
+      Top = 17
+      Width = 180
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 0
+    end
+    object SelList: TListBox
+      AnchorSideLeft.Control = InBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = Label2
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel2
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Panel2
+      AnchorSideBottom.Side = asrBottom
+      Left = 224
+      Height = 273
+      Top = 17
+      Width = 181
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 2
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 3
+    end
+    object InBtn: TBitBtn
+      AnchorSideLeft.Control = Panel2
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideBottom.Control = VertCenterBevel
+      Left = 188
+      Height = 28
+      Top = 119
+      Width = 28
+      Anchors = [akLeft, akBottom]
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = InBtnClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object OutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel2
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = VertCenterBevel
+      AnchorSideTop.Side = asrBottom
+      AnchorSideBottom.Control = VertCenterBevel
+      AnchorSideBottom.Side = asrBottom
+      Left = 188
+      Height = 28
+      Top = 159
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = OutBtnClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object VertCenterBevel: TBevel
+      AnchorSideLeft.Control = InBtn
+      AnchorSideTop.Control = VarList
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = OutBtn
+      AnchorSideRight.Side = asrBottom
+      Left = 188
+      Height = 12
+      Top = 147
+      Width = 28
+      Anchors = [akTop, akLeft, akRight]
+      Shape = bsSpacer
+    end
+  end
+  object Bevel2: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 298
+    Width = 421
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object CloseBtn: TButton
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 354
+    Height = 25
+    Top = 314
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 1
+  end
+  object ResetBtn: TButton
+    AnchorSideTop.Control = CloseBtn
+    AnchorSideRight.Control = ComputeBtn
+    Left = 200
+    Height = 25
+    Top = 314
+    Width = 54
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Right = 12
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 2
+  end
+  object HelpBtn: TButton
+    AnchorSideTop.Control = CloseBtn
+    AnchorSideRight.Control = ResetBtn
+    Left = 137
+    Height = 25
+    Top = 314
+    Width = 51
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Right = 12
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 3
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 266
+    Height = 25
+    Top = 314
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 4
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/crosstabunit.pas

@@ -0,0 +1,464 @@
+// Use file "twoway.laz" for testing
+
+unit CrossTabUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Buttons, ExtCtrls,
+  Globals, OutputUnit, MainUnit, DataProcs, MatrixLib, ContextHelpUnit;
+
+type
+
+  { TCrossTabFrm }
+
+  TCrossTabFrm = class(TForm)
+    ComputeBtn: TButton;
+    VertCenterBevel: TBevel;
+    Bevel2: TBevel;
+    HelpBtn: TButton;
+    InBtn: TBitBtn;
+    OutBtn: TBitBtn;
+    Panel2: TPanel;
+    ResetBtn: TButton;
+    CloseBtn: TButton;
+    Label1: TLabel;
+    Label2: TLabel;
+    VarList: TListBox;
+    SelList: TListBox;
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure InBtnClick(Sender: TObject);
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure OutBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    grandsum, sum, index : integer;
+    no_in_list, length_array, ptr1, ptr2 : integer ;
+    var_list, min_value, max_value, levels, displace, subscript : IntDyneVec;
+    freq : IntDyneVec;
+    outgrid : DblDyneMat;
+    rowlabels : StrDyneVec;
+    colLabels : StrDyneVec;
+    ColNoSelected : IntDyneVec;
+    NoSelected : integer;
+    NV, NC : integer;
+
+    procedure Initialize;
+    procedure GetLevels(AReport: TStrings);
+    function IndexPosition(x: IntDyneVec): integer;
+    Procedure Tabulate;
+    procedure BreakDown(AReport: TStrings);
+    procedure UpdateBtnStates;
+
+  public
+    { public declarations }
+  end; 
+
+var
+  CrossTabFrm: TCrossTabFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TCrossTabFrm }
+
+procedure TCrossTabFrm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  VarList.Clear;
+  SelList.Clear;
+  NV := NoVariables;
+  NC := NoCases;
+  for i := 1 to NV do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  UpdateBtnStates;
+end;
+
+procedure TCrossTabFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TCrossTabFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).Tag);
+end;
+
+procedure TCrossTabFrm.InBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while i < VarList.Items.Count do
+  begin
+    if VarList.Selected[i] then
+    begin
+      SelList.Items.Add(VarList.Items[i]);
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TCrossTabFrm.ComputeBtnClick(Sender: TObject);
+var
+  cellvalue: string;
+  i, j: integer;
+  lReport: TStrings;
+begin
+  if SelList.Items.Count = 0 then
+  begin
+    MessageDlg('No variables selected for analysis.', mtError, [mbOK], 0);
+    exit;
+  end;
+
+  SetLength(var_list, NV);
+  SetLength(min_value, NV);
+  SetLength(max_value, NV);
+  SetLength(levels, NC);
+  SetLength(displace, NC);
+  SetLength(subscript,NC);
+  SetLength(ColNoSelected, NV);
+
+  lReport := TStringList.Create;
+  try
+    lReport.Add('CROSSTAB RESULTS');
+    lReport.Add('');
+    lReport.Add('Analyzed data is from file ' + OS3MainFrm.FileNameEdit.Text);
+    lReport.Add('');
+
+    Initialize;
+
+    NoSelected := 0;
+    for i := 0 to SelList.Items.Count-1 do
+    begin
+      for j := 1 to NV do
+      begin
+        cellvalue := OS3MainFrm.DataGrid.Cells[j,0];
+        if cellvalue = SelList.Items[i] then
+        begin
+          var_list[i] := j;
+          ColNoSelected[i] := j;
+          NoSelected := NoSelected + 1;
+          break;
+        end;
+      end;
+    end;
+
+    no_in_list := SelList.Items.Count;
+    GetLevels(lReport);
+    Tabulate;
+    BreakDown(lReport);
+
+    lReport.Add('');
+    lReport.Add('Grand sum across all categories = %d', [grandsum]);
+
+    DisplayReport(lReport);
+
+  finally
+    lReport.Free;
+
+    ColNoSelected := nil;
+    freq := nil;
+    collabels := nil;
+    rowlabels := nil;
+    outgrid := nil;
+    subscript := nil;
+    displace := nil;
+    levels := nil;
+    max_value := nil;
+    min_value := nil;
+    var_list := nil;
+  end;
+end;
+
+procedure TCrossTabFrm.OutBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while i < SelList.Items.Count do
+  begin
+    if SelList.Selected[i] then
+    begin
+      VarList.Items.Add(SelList.Items[i]);
+      SelList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TCrossTabFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+   if FAutoSized then
+     exit;
+
+   w := MaxValue([HelpBtn.Width, ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+   HelpBtn.Constraints.MinWidth := w;
+   ResetBtn.Constraints.MinWidth := w;
+   ComputeBtn.Constraints.MinWidth := w;
+   CloseBtn.Constraints.MinWidth := w;
+
+   Constraints.MinWidth := Width;
+   Constraints.MinHeight := Height;
+
+   FAutoSized := true;
+end;
+
+procedure TCrossTabFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+end;
+
+procedure TCrossTabFrm.Initialize;
+var
+  i: integer;
+begin
+  no_in_list := 0;
+  for i := 1 to NV do
+  begin
+    var_list[i-1] := 0;
+    min_value[i-1] := 0;
+    max_value[i-1] := 0;
+    levels[i-1] := 0;
+    displace[i-1] := 0;
+    subscript[i-1] := 0;
+  end;
+  index := 0;
+  length_array := 0;
+  grandsum := 0;
+end; { initialize procedure }
+
+procedure TCrossTabFrm.GetLevels(AReport: TStrings);
+var
+  i, j, k: integer;
+  value: double;
+begin
+  for i := 1 to no_in_list do
+  begin
+    j := var_list[i-1];
+    if not GoodRecord(1,NoSelected,ColNoSelected) then continue;
+    value := StrToFloat(OS3MainFrm.DataGrid.Cells[j,1]);
+    min_value[i-1] := round(value);
+    max_value[i-1] := round(value);
+    for k := 2 to NC do
+    begin
+      if not GoodRecord(k,NoSelected,ColNoSelected) then continue;
+      value := StrToFloat(OS3MainFrm.DataGrid.Cells[j,k]);
+      if value < min_value[i-1] then
+        min_value[i-1] := round(value);
+      if value > max_value[i-1] then
+        max_value[i-1] := round(value);
+    end;
+  end;
+
+  for i := 1 to no_in_list do
+  begin
+    j := var_list[i-1];
+    levels[i-1] := max_value[i-1] - min_value[i-1] + 1;
+    AReport.Add('%s min.=%3d, max.=%3d, no. levels = %3d', [
+      OS3MainFrm.DataGrid.Cells[j,0],min_value[i-1],max_value[i-1],levels[i-1]
+    ]);
+  end;
+  AReport.Add('');
+
+  displace[no_in_list-1] := 1;
+  if no_in_list > 1 then
+    for i := (no_in_list - 1) downto 1 do
+      displace[i-1] := levels[i] * displace[i];
+end;
+
+function TCrossTabFrm.IndexPosition(x: IntDyneVec): integer;
+var
+  i: integer;
+begin
+  Result := x[no_in_list-1];
+  if no_in_list > 1 then
+  begin
+    for i := 1 to no_in_list - 1 do
+      Result := Result + (x[i-1] -1) * displace[i-1];
+  end;
+end;
+
+procedure TCrossTabFrm.Tabulate;
+var
+  i, j, k: integer;
+  value: double;
+  x: integer;
+begin
+  length_array := 1;
+  for i := 1 to no_in_list do
+    length_array := length_array * levels[i-1];
+  SetLength(freq,length_array+1);
+
+  for i := 0 to length_array do
+    freq[i] := 0;
+  for i := 1 to NC do
+  begin
+    if IsFiltered(i) then
+      continue;
+    for j := 1 to no_in_list do
+    begin
+      if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+      k := var_list[j-1];
+      value := StrToFloat(OS3MainFrm.DataGrid.Cells[k,i]);
+      x := round(value);
+      x := x - min_value[j-1] + 1;
+      subscript[j-1] := x;
+    end;
+    j := IndexPosition(subscript);
+
+    if (j < 1) or (j > length_array) then
+      continue
+    else
+      freq[j] := freq[j] + 1;
+  end;
+end; { procedure TABULATE }
+
+procedure TCrossTabFrm.BreakDown(AReport: TStrings);
+label 1,2,3,4, printgrid;
+var
+  i, j, row, col, bigmax: integer;
+  outline: string;
+  value: string;
+  title: String;
+begin
+  bigmax := -1;
+  for i := 0 to no_in_list-1 do
+    if Levels[i] > bigmax then bigmax := Levels[i];
+
+  SetLength(colLabels,bigmax);
+  SetLength(outgrid,length_array,bigmax);
+  SetLength(rowlabels,length_array);
+  outline := OS3MainFrm.DataGrid.Cells[var_list[no_in_list-1], 0];
+  for col := 1 to Levels[no_in_list-1] do
+    collabels[col-1] := outline + Format(':%3d', [min_value[no_in_list-1] + col - 1]);
+  for row := 1 to length_array do
+    rowlabels[row-1] := '';
+  ptr1 := no_in_list - 1;
+  ptr2 := no_in_list;
+  for i := 1 to no_in_list do
+    subscript[i-1] := 1;
+
+  AReport.Add('FREQUENCIES BY LEVEL:');
+  sum := 0;
+  col := 1;
+  row := 1;
+
+ 1:
+   index := IndexPosition(subscript);
+   outline := 'For cell levels: ';
+   for i := 1 to no_in_list do
+   begin
+     j := var_list[i-1];
+     value := Format('%s:%3d  ',[OS3MainFrm.DataGrid.Cells[j,0], min_value[i-1] + subscript[i-1] - 1]);
+     outline := outline + value;
+   end;
+   sum := sum + freq[index];
+   outgrid[row-1,col-1] := freq[index];
+   outline := outline + Format(' Frequency = %3d', [freq[index]]);
+   AReport.Add(outline);
+
+   subscript[ptr2-1] := subscript[ptr2-1] + 1;
+   col := col + 1;
+   if subscript[ptr2-1] <= levels[ptr2-1] then
+     goto 1;
+
+   AReport.Add('Sum across levels = %3d', [sum]);
+   AReport.Add('');
+   AReport.Add('');
+
+   grandsum := grandsum + sum;
+   sum := 0;
+   row := row + 1;
+
+ 2:
+   if ptr1 < 1 then
+     goto printgrid;
+
+   subscript[ptr1-1] := subscript[ptr1-1] + 1;
+   if subscript[ptr1-1] <= levels[ptr1-1] then
+     goto 4;
+
+ 3:
+   ptr1 := ptr1 - 1;
+   if ptr1 < 1 then
+     goto printgrid;
+   if subscript[ptr1-1] >= levels[ptr1-1] then
+     goto 3;
+   subscript[ptr1-1] := subscript[ptr1-1] + 1;
+
+ 4:
+   for i := ptr1 + 1 to no_in_list do
+     subscript[i-1] := 1;
+   ptr1 := no_in_list - 1;
+   col := 1;
+
+   goto 1;
+
+printgrid:
+  title := 'Cell Frequencies by Levels';
+  for i := 1 to row - 1 do
+  begin
+    value := format('Block %d',[i]);
+    rowlabels[i-1] := value;
+  end;
+
+  MatPrint(outgrid,row-1,Levels[no_in_list-1],title,rowlabels,collabels,NC, AReport);
+end; { Procedure BREAKDOWN }
+
+procedure TCrossTabFrm.UpdateBtnStates;
+var
+  lSelected: Boolean;
+  i: Integer;
+begin
+  lSelected := false;
+  for i := 0 to VarList.Items.Count-1 do
+    if VarList.Selected[i] then
+    begin
+      lSelected := true;
+      break;
+    end;
+  InBtn.Enabled := lSelected;
+
+  lSelected := false;
+  for i := 0 to SelList.Items.Count-1 do
+    if SelList.Selected[i] then
+    begin
+      lSelected := true;
+      break;
+    end;
+  OutBtn.Enabled := lSelected;
+end;
+
+procedure TCrossTabFrm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+
+initialization
+  {$I crosstabunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/descriptiveunit.lfm

@@ -0,0 +1,305 @@
+object DescriptiveFrm: TDescriptiveFrm
+  Left = 626
+  Height = 393
+  Top = 226
+  Width = 453
+  AutoSize = True
+  Caption = 'Descriptive Statistics'
+  ClientHeight = 393
+  ClientWidth = 453
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 390
+    Height = 25
+    Top = 360
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 9
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 244
+    Height = 25
+    Top = 360
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 8
+  end
+  object HelpBtn: TButton
+    Tag = 119
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 185
+    Height = 25
+    Top = 360
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 7
+  end
+  object Label1: TLabel
+    AnchorSideLeft.Control = GroupBox1
+    AnchorSideTop.Control = CIEdit
+    AnchorSideTop.Side = asrCenter
+    AnchorSideRight.Control = CIEdit
+    Left = 8
+    Height = 15
+    Top = 325
+    Width = 174
+    BorderSpacing.Right = 8
+    Caption = 'Confidence Interval for the Mean'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 15
+    Top = 8
+    Width = 46
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Variables'
+    ParentColor = False
+  end
+  object Label3: TLabel
+    AnchorSideLeft.Control = SelList
+    AnchorSideTop.Control = Owner
+    Left = 257
+    Height = 15
+    Top = 8
+    Width = 44
+    BorderSpacing.Top = 8
+    Caption = 'Selected'
+    ParentColor = False
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label2
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = AllBtn
+    AnchorSideBottom.Control = GroupBox1
+    Left = 8
+    Height = 208
+    Top = 25
+    Width = 187
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Constraints.MinHeight = 200
+    ItemHeight = 0
+    MultiSelect = True
+    OnSelectionChange = VarListSelectionChange
+    TabOrder = 0
+  end
+  object SelList: TListBox
+    AnchorSideLeft.Control = AllBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Label3
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = VarList
+    AnchorSideBottom.Side = asrBottom
+    Left = 257
+    Height = 208
+    Top = 25
+    Width = 188
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    ItemHeight = 0
+    OnSelectionChange = VarListSelectionChange
+    TabOrder = 4
+  end
+  object CIEdit: TEdit
+    AnchorSideLeft.Control = Label1
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel1
+    Left = 190
+    Height = 23
+    Top = 321
+    Width = 41
+    Alignment = taRightJustify
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    TabOrder = 6
+    Text = '95.0'
+  end
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = CIEdit
+    Left = 8
+    Height = 72
+    Top = 241
+    Width = 306
+    Anchors = [akLeft, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Options'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.HorizontalSpacing = 24
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 2
+    ClientHeight = 52
+    ClientWidth = 302
+    TabOrder = 5
+    object CaseChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 138
+      BorderSpacing.Left = 12
+      BorderSpacing.Right = 12
+      Caption = 'Casewise Deletion'
+      TabOrder = 0
+    end
+    object CheckBox1: TCheckBox
+      AnchorSideTop.Side = asrBottom
+      Left = 174
+      Height = 19
+      Top = 6
+      Width = 116
+      BorderSpacing.Left = 12
+      BorderSpacing.Right = 12
+      Caption = 'z Scores to Grid'
+      TabOrder = 1
+    end
+    object PcntileChk: TCheckBox
+      AnchorSideTop.Side = asrBottom
+      Left = 12
+      Height = 19
+      Top = 27
+      Width = 138
+      BorderSpacing.Left = 12
+      BorderSpacing.Right = 12
+      Caption = 'Show Percentile Ranks'
+      TabOrder = 2
+    end
+    object AltQrtilesChk: TCheckBox
+      AnchorSideTop.Side = asrBottom
+      Left = 174
+      Height = 19
+      Top = 27
+      Width = 116
+      BorderSpacing.Left = 12
+      BorderSpacing.Right = 12
+      Caption = 'Show All Quartiles'
+      TabOrder = 3
+    end
+  end
+  object InBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = VarList
+    AnchorSideRight.Side = asrBottom
+    Left = 212
+    Height = 28
+    Top = 25
+    Width = 28
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = InBtnClick
+    Spacing = 0
+    TabOrder = 1
+  end
+  object OutBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = InBtn
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Side = asrBottom
+    Left = 212
+    Height = 28
+    Top = 57
+    Width = 28
+    BorderSpacing.Top = 4
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = OutBtnClick
+    Spacing = 0
+    TabOrder = 2
+  end
+  object AllBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = OutBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 203
+    Height = 25
+    Top = 117
+    Width = 46
+    AutoSize = True
+    BorderSpacing.Top = 32
+    Caption = 'ALL'
+    OnClick = AllBtnClick
+    TabOrder = 3
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 344
+    Width = 453
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 306
+    Height = 25
+    Top = 360
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 10
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/descriptiveunit.pas

@@ -0,0 +1,473 @@
+unit DescriptiveUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls, Buttons,
+  MainUnit, Globals, FunctionsLib, OutputUnit, DataProcs, DictionaryUnit, ContextHelpUnit;
+
+
+type
+
+  { TDescriptiveFrm }
+
+  TDescriptiveFrm = class(TForm)
+    Bevel1: TBevel;
+    ComputeBtn: TButton;
+    CaseChk: TCheckBox;
+    CheckBox1: TCheckBox;
+    AltQrtilesChk: TCheckBox;
+    HelpBtn: TButton;
+    Label2: TLabel;
+    Label3: TLabel;
+    PcntileChk: TCheckBox;
+    GroupBox1: TGroupBox;
+    InBtn: TBitBtn;
+    OutBtn: TBitBtn;
+    AllBtn: TBitBtn;
+    ResetBtn: TButton;
+    CloseBtn: TButton;
+    CIEdit: TEdit;
+    Label1: TLabel;
+    VarList: TListBox;
+    SelList: TListBox;
+    procedure AllBtnClick(Sender: TObject);
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure InBtnClick(Sender: TObject);
+    procedure OutBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    sum, variance, stddev, value, mean, min, max, range, skew, prob, df, CI : double;
+    kurtosis, z, semean, seskew, sekurtosis, deviation, devsqr, M2, M3, M4 : double;
+    Q1, Q2, Q3, Q12, Q13, Q14, Q15, Q16, Q17, Q18, Q22, Q23, Q24, Q25, Q26 : double;
+    Q27, Q28, Q32, Q33, Q34, Q35, Q36, Q37, Q38, IQrange : double;
+    ncases, noselected : integer;
+    cellstring, gridstring: string;
+    selected : IntDyneVec;
+    procedure UpdateBtnStates;
+
+  public
+    { public declarations }
+  end; 
+
+var
+  DescriptiveFrm: TDescriptiveFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TDescriptiveFrm }
+
+procedure TDescriptiveFrm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  CIEdit.Text := FormatFloat('0.0', DEFAULT_CONFIDENCE_LEVEL_PERCENT);
+  VarList.Clear;
+  SelList.Clear;
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  Selected := nil;
+  UpdateBtnStates;
+end;
+
+procedure TDescriptiveFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TDescriptiveFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if DictionaryFrm = nil then Application.CreateForm(TDictionaryFrm, DictionaryFrm);
+end;
+
+procedure TDescriptiveFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TDescriptiveFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).tag);
+end;
+
+procedure TDescriptiveFrm.InBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while i < VarList.Items.Count do
+  begin
+    if VarList.Selected[i] then
+    begin
+      SelList.Items.Add(VarList.Items[i]);
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TDescriptiveFrm.ComputeBtnClick(Sender: TObject);
+var
+  i, j, k, m: integer;
+  num, den, cases: double;
+  values, pcntrank: DblDyneVec;
+  lReport: TStrings;
+begin
+  noselected := SelList.Items.Count;
+  if noSelected = 0 then
+  begin
+    MessageDlg('No variables selected.', mtError, [mbOK], 0);
+    exit;
+  end;
+
+  SetLength(Selected, noselected);
+
+  // Get selected variables
+  for i := 1 to noselected do
+  begin
+    cellstring := SelList.Items.Strings[i-1];
+    for j := 1 to NoVariables do
+      if cellstring = OS3MainFrm.DataGrid.Cells[j,0] then selected[i-1] := j;
+  end;
+
+  lReport := TStringList.Create;
+  try
+    lReport.Add('DISTRIBUTION PARAMETER ESTIMATES');
+    lReport.Add('');
+
+    SetLength(Values, NoCases);
+    SetLength(pcntrank, NoCases);
+
+    for j := 1 to noselected do
+    begin
+      deviation := 0.0;
+      devsqr := 0.0;
+      M2 := 0.0;
+      M3 := 0.0;
+      M4 := 0.0;
+      sum := 0.0;
+      variance := 0.0;
+      stddev := 0.0;
+      range := 0.0;
+      skew := 0.0;
+      kurtosis := 0.0;
+      ncases := 0;
+      df := 0.0;
+      seskew := 0.0;
+      kurtosis := 0.0;
+      sekurtosis := 0.0;
+      k := selected[j-1];
+      CI := StrToFloat(CIEdit.Text) / 100.0;
+      prob := CI;
+      CI := (1.0 - CI) / 2.0;
+      CI := 1.0 - CI;
+
+      if CheckBox1.Checked then // add a new column to the grid
+      begin
+        gridstring := OS3MainFrm.DataGrid.Cells[k,0];
+        gridstring := Gridstring + 'z';
+        DictionaryFrm.NewVar(NoVariables+1);
+        DictionaryFrm.DictGrid.Cells[1,NoVariables] := gridstring;
+        OS3MainFrm.DataGrid.Cells[NoVariables,0] := gridstring;
+      end;
+
+      // Accumulate sums of squares, sums, etc. for variable j
+      min := 1.0e308;
+      max := -1.0e308;
+      for i := 1 to NoCases do
+      begin
+        if not GoodRecord(i,noselected,selected) then
+          continue;
+
+        if CaseChk.Checked then
+        begin
+          if not ValidValue(i,selected[j-1]) then
+            continue;
+        end
+        else if not GoodRecord(i,noselected,selected) then
+          continue;
+
+        value := StrToFloat(OS3MainFrm.DataGrid.Cells[k,i]);
+        ncases := ncases + 1;
+        values[ncases-1] := value;
+        df := df + 1.0;
+        sum := sum + value;
+        variance := variance + (value * value);
+        if (value < min) then min := value;
+        if (value > max) then max := value;
+      end;
+
+      if ncases > 0 then
+      begin
+        mean := sum / ncases;
+        range := max - min;
+      end;
+
+      if ncases > 1 then
+      begin
+        variance := variance - (sum * sum) / ncases;
+        variance := variance / (ncases - 1);
+        stddev := sqrt(variance);
+        semean := sqrt(variance / ncases);
+        if ncases < 120 then
+          CI := semean * inverset(CI,df)
+        else
+          CI := semean * inversez(CI);
+      end;
+
+      if variance = 0.0 then
+      begin
+        cellstring := OS3MainFrm.DataGrid.Cells[k,0];
+        MessageDlg('No Variability in '+ cellstring + ' variable - ending analysis.', mtInformation, [mbOK], 0);
+        exit;
+      end;
+
+      if ncases > 3 then // obtain skew, kurtosis and z scores
+      begin
+        for i := 1 to NoCases do
+        begin
+          if CaseChk.Checked then
+          begin
+            if not ValidValue(i,selected[j-1]) then continue;
+          end else
+            if not GoodRecord(i,noselected,selected) then continue;
+
+          value := StrToFloat(OS3MainFrm.DataGrid.Cells[k,i]);
+          if stddev > 0.0 then
+          begin
+            deviation := value - mean;
+            devsqr := deviation * deviation;
+            M2 := M2 + devsqr;
+            M3 := M3 + (deviation * devsqr);
+            M4 := M4 + (devsqr * devsqr);
+            z := (value - mean) / stddev;
+            if CheckBox1.Checked then
+            begin
+              cellstring := format('%8.5f',[z]);
+              OS3MainFrm.DataGrid.Cells[NoVariables,i] := cellstring;
+            end;
+          end;
+        end;
+
+        if ncases > 2 then
+        begin
+          skew := (ncases * M3) / ((ncases - 1) * (ncases - 2) * stddev * variance);
+          cases := ncases;
+          num := 6.0 * cases * (cases - 1.0);
+          den := (cases - 2.0) * (cases + 1.0) * (cases + 3.0);
+          seskew := sqrt(num / den);
+        end;
+
+        if ncases > 3 then
+        begin
+          kurtosis := (ncases * (ncases + 1) * M4) - (3 * M2 * M2 * (ncases - 1));
+          kurtosis := kurtosis / ( (ncases - 1) * (ncases - 2) * (ncases - 3) * (variance * variance) );
+          sekurtosis := sqrt((4.0 * (ncases * ncases - 1) * (seskew * seskew)) / ((ncases - 3) * (ncases + 5)));
+        end;
+      end;
+
+      // output results for the kth variable
+      cellstring := OS3MainFrm.DataGrid.Cells[k,0];
+      if j > 1 then lReport.Add('');
+      lReport.Add('VARIABLE:                  %10s', ['"' + cellString + '"']);
+      lReport.Add('');
+      lReport.Add('Number of cases:           %10d', [nCases]);
+      lReport.Add('Sum:                       %10.3f', [sum]);
+      lReport.Add('Mean:                      %10.3f', [mean]);
+      lReport.Add('Variance:                  %10.3f', [variance]);
+      lReport.Add('Std.Dev.:                  %10.3f', [stddev]);
+      lReport.Add('Std.Error of Mean          %10.3f', [seMean]);
+      lReport.Add('%.2f%% Conf.Interval Mean: %10.3f to %.3f', [prob*100.0, mean - CI, mean + CI]);
+      lReport.Add('Range:                     %10.3f', [range]);
+      lReport.Add('Minimum:                   %10.3f', [min]);
+      lReport.Add('Maximum:                   %10.3f', [max]);
+      lReport.Add('Skewness:                  %10.3f', [skew]);
+      lReport.Add('Std.Error of Skew:         %10.3f', [seSkew]);
+      lReport.Add('Kurtosis:                  %10.3f', [kurtosis]);
+      lReport.Add('Std. Error of Kurtosis:    %10.3f', [seKurtosis]);
+      lReport.Add('');
+
+      if ncases > 4 then  // get percentiles and quartiles
+      begin
+        // get percentile ranks
+        if pcntileChk.Checked then PRank(k, pcntRank);
+
+        // sort values and get quartiles
+        for i := 0 to ncases - 2 do
+        begin
+          for m := i + 1 to ncases -1 do
+          begin
+            if values[i] > values[m] then
+            begin
+              value := values[i];
+              values[i] := values[m];
+              values[m] := value;
+            end;
+          end;
+        end;
+        Q1 := Quartiles(2,0.25,ncases,values);
+        Q2 := Quartiles(2,0.5,ncases,values);
+        Q3 := Quartiles(2,0.75,ncases,values);
+        IQrange := Q3 - Q1;
+        lReport.Add('First Quartile:            %10.3f', [Q1]);
+        lReport.Add('Median:                    %10.3f', [Q2]);
+        lReport.Add('Third Quartile:            %10.3f', [Q3]);
+        lReport.Add('Interquartile range:       %10.3f', [IQrange]);
+        lReport.Add('');
+      end;
+
+      if (AltQrtilesChk.Checked) then
+      begin
+        lReport.Add('Alternative Methods for Obtaining Quartiles');
+        lReport.Add('    Method 1    2       3       4       5       6       7       8');
+        lReport.Add('Pcntile');
+        Q1 := Quartiles(1,0.25,ncases,values);
+        Q12 := Quartiles(2,0.25,ncases,values);
+        Q13 := Quartiles(3,0.25,ncases,values);
+        Q14 := Quartiles(4,0.25,ncases,values);
+        Q15 := Quartiles(5,0.25,ncases,values);
+        Q16 := Quartiles(6,0.25,ncases,values);
+        Q17 := Quartiles(7,0.25,ncases,values);
+        Q18 := Quartiles(8,0.25,ncases,values);
+        lReport.Add('Q1   %8.3f%8.3f%8.3f%8.3f%8.3f%8.3f%8.3f%8.3f', [Q1,Q12,Q13,Q14,Q15,Q16,Q17,Q18]);
+        Q2 := Quartiles(1,0.5,ncases,values);
+        Q22 := Quartiles(2,0.5,ncases,values);
+        Q23 := Quartiles(3,0.5,ncases,values);
+        Q24 := Quartiles(4,0.5,ncases,values);
+        Q25 := Quartiles(5,0.5,ncases,values);
+        Q26 := Quartiles(6,0.5,ncases,values);
+        Q27 := Quartiles(7,0.5,ncases,values);
+        Q28 := Quartiles(8,0.5,ncases,values);
+        lReport.Add('Q2   %8.3f%8.3f%8.3f%8.3f%8.3f%8.3f%8.3f%8.3f', [Q2,Q22,Q23,Q24,Q25,Q26,Q27,Q28]);
+        Q3 := Quartiles(1,0.75,ncases,values);
+        Q32 := Quartiles(2,0.75,ncases,values);
+        Q33 := Quartiles(3,0.75,ncases,values);
+        Q34 := Quartiles(4,0.75,ncases,values);
+        Q35 := Quartiles(5,0.75,ncases,values);
+        Q36 := Quartiles(6,0.75,ncases,values);
+        Q37 := Quartiles(7,0.75,ncases,values);
+        Q38 := Quartiles(8,0.75,ncases,values);
+        lReport.Add('Q3   %8.3f%8.3f%8.3f%8.3f%8.3f%8.3f%8.3f%8.3f', [Q3,Q32,Q33,Q34,Q35,Q36,Q37,Q38]);
+        lReport.Add('NOTES:');
+        lReport.Add('Method 1 is the weighted average at X[np] where n is no. of cases, p is percentile / 100');
+        lReport.Add('Method 2 is the weighted average at X[(n+1)p] This is used in this program.');
+        lReport.Add('Method 3 is the empirical distribution function.');
+        lReport.Add('Method 4 is called the empirical distribution function - averaging.');
+        lReport.Add('Method 5 is called the empirical distribution function = Interpolation.');
+        lReport.Add('Method 6 is the closest observation method.');
+        lReport.Add('Method 7 is from the TrueBasic Statistics Graphics Toolkit.');
+        lReport.Add('Method 8 was used in an older Microsoft Excel version.');
+        lReport.Add('See the internet site http://www.xycoon.com/ for the above.');
+        lReport.Add('');
+      end;  // end of experimental alternatives
+      lReport.Add('--------------------------------------------------------------');
+    end; // next j variable
+
+    DisplayReport(lReport);
+
+  finally
+    lReport.Free;
+    Selected := nil;
+    Values := nil;
+    pcntrank := nil;
+  end;
+end;
+
+procedure TDescriptiveFrm.OutBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while i < SelList.Items.Count do
+  begin
+    if SelList.Selected[i] then
+    begin
+      VarList.Items.Add(SelList.Items[i]);
+      SelList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TDescriptiveFrm.AllBtnClick(Sender: TObject);
+var
+  i : integer;
+begin
+  for i := 0 to VarList.Items.Count-1 do
+    SelList.Items.Add(VarList.Items.Strings[i]);
+  VarList.Clear;
+  UpdateBtnStates;
+end;
+
+procedure TDescriptiveFrm.UpdateBtnStates;
+var
+  lSelected: Boolean;
+  i: Integer;
+begin
+  lSelected := false;
+  for i := 0 to VarList.Items.Count-1 do
+    if VarList.Selected[i] then
+    begin
+      lSelected := true;
+      break;
+    end;
+  InBtn.Enabled := lSelected;
+
+  lSelected := false;
+  for i := 0 to SelList.Items.Count-1 do
+    if SelList.Selected[i] then
+    begin
+      lSelected := true;
+      break;
+    end;
+  OutBtn.Enabled := lSelected;
+
+  AllBtn.Enabled := VarList.Count > 0;
+end;
+
+procedure TDescriptiveFrm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+
+initialization
+  {$I descriptiveunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/freqspecsunit.lfm

@@ -0,0 +1,266 @@
+object FreqSpecsFrm: TFreqSpecsFrm
+  Left = 310
+  Height = 331
+  Top = 137
+  Width = 325
+  AutoSize = True
+  BorderStyle = bsSingle
+  Caption = 'Frequency Specifications'
+  ClientHeight = 331
+  ClientWidth = 325
+  OnActivate = FormActivate
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = VarName
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 84
+    Width = 44
+    BorderSpacing.Left = 8
+    Caption = 'Variable:'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Minimum
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 115
+    Width = 53
+    BorderSpacing.Left = 8
+    Caption = 'Minimum'
+    ParentColor = False
+  end
+  object Label3: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Maximum
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 146
+    Width = 55
+    BorderSpacing.Left = 8
+    Caption = 'Maximum'
+    ParentColor = False
+  end
+  object Label4: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Range
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 177
+    Width = 33
+    BorderSpacing.Left = 8
+    Caption = 'Range'
+    ParentColor = False
+  end
+  object Label5: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = IntSize
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 208
+    Width = 62
+    BorderSpacing.Left = 8
+    Caption = 'Interval Size'
+    ParentColor = False
+  end
+  object Label6: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = NoInts
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 239
+    Width = 105
+    BorderSpacing.Left = 8
+    Caption = 'Number of Intervals'
+    ParentColor = False
+  end
+  object VarName: TEdit
+    AnchorSideLeft.Control = NoInts
+    AnchorSideTop.Control = Memo1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 137
+    Height = 23
+    Top = 80
+    Width = 180
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Top = 12
+    BorderSpacing.Right = 8
+    ReadOnly = True
+    TabOrder = 0
+  end
+  object Minimum: TEdit
+    AnchorSideLeft.Control = NoInts
+    AnchorSideTop.Control = VarName
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 137
+    Height = 23
+    Top = 111
+    Width = 180
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    ReadOnly = True
+    TabOrder = 1
+  end
+  object Maximum: TEdit
+    AnchorSideLeft.Control = NoInts
+    AnchorSideTop.Control = Minimum
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 137
+    Height = 23
+    Top = 142
+    Width = 180
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    ReadOnly = True
+    TabOrder = 2
+  end
+  object Range: TEdit
+    AnchorSideLeft.Control = NoInts
+    AnchorSideTop.Control = Maximum
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 137
+    Height = 23
+    Top = 173
+    Width = 180
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    ReadOnly = True
+    TabOrder = 3
+  end
+  object IntSize: TEdit
+    AnchorSideLeft.Control = NoInts
+    AnchorSideTop.Control = Range
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 137
+    Height = 23
+    Top = 204
+    Width = 180
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    OnKeyPress = IntSizeKeyPress
+    TabOrder = 4
+  end
+  object NoInts: TEdit
+    AnchorSideLeft.Control = Label6
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = IntSize
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 137
+    Height = 23
+    Top = 235
+    Width = 180
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Left = 24
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    TabOrder = 5
+  end
+  object CancelBtn: TButton
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = OKBtn
+    Left = 201
+    Height = 25
+    Top = 274
+    Width = 62
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Cancel'
+    ModalResult = 2
+    TabOrder = 7
+  end
+  object OKBtn: TButton
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 275
+    Height = 25
+    Top = 274
+    Width = 42
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'OK'
+    ModalResult = 1
+    OnClick = OKBtnClick
+    TabOrder = 8
+  end
+  object HelpBtn: TButton
+    Tag = 123
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = CancelBtn
+    Left = 138
+    Height = 25
+    Top = 274
+    Width = 51
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Left = 36
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 6
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = NoInts
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 0
+    Height = 8
+    Top = 258
+    Width = 325
+    Anchors = [akTop, akLeft, akRight]
+    Shape = bsBottomLine
+  end
+  object Memo1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 8
+    Height = 60
+    Top = 8
+    Width = 309
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Around = 8
+    Caption = 'The number of intervals must be less than or equal to the number of cases.  To change the number of intervals, change the interval size to a larger value.  Press the Enter key to make the number of intervals smaller.'
+    ParentColor = False
+    WordWrap = True
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/freqspecsunit.pas

@@ -0,0 +1,149 @@
+unit FreqSpecsUnit; 
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls,
+  ContextHelpUnit;
+
+type
+
+  { TFreqSpecsFrm }
+
+  TFreqSpecsFrm = class(TForm)
+    Bevel1: TBevel;
+    CancelBtn: TButton;
+    HelpBtn: TButton;
+    Memo1: TLabel;
+    OKBtn: TButton;
+    VarName: TEdit;
+    Minimum: TEdit;
+    Maximum: TEdit;
+    Range: TEdit;
+    IntSize: TEdit;
+    NoInts: TEdit;
+    Label1: TLabel;
+    Label2: TLabel;
+    Label3: TLabel;
+    Label4: TLabel;
+    Label5: TLabel;
+    Label6: TLabel;
+    procedure FormActivate(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure IntSizeKeyPress(Sender: TObject; var Key: char);
+    procedure OKBtnClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    FNoCases: Integer;
+    function Validate(out AMsg: String; out AControl: TWinControl): Boolean;
+  public
+    { public declarations }
+    property NoCases: Integer read FNoCases write FNoCases;
+  end; 
+
+var
+  FreqSpecsFrm: TFreqSpecsFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TFreqSpecsFrm }
+
+procedure TFreqSpecsFrm.IntSizeKeyPress(Sender: TObject; var Key: char);
+var
+   rangeval : double;
+   increment : double;
+begin
+     if ord(Key) <> 13 then exit;
+     rangeval := StrToFloat(Range.Text);
+     increment := StrToFloat(IntSize.Text);
+     NoInts.Text := FloatToStr(rangeval / increment);
+end;
+
+procedure TFreqSpecsFrm.OKBtnClick(Sender: TObject);
+var
+  msg: String;
+  C: TWinControl;
+begin
+  if not Validate(msg, C) then begin
+    C.SetFocus;
+    MessageDlg(msg, mtError, [mbOK], 0);
+    ModalResult := mrNone;
+  end;
+end;
+
+function TFreqSpecsFrm.Validate(out AMsg: String;
+  out AControl: TWinControl): Boolean;
+var
+   NoIntervals: Integer;
+   f: Double;
+begin
+  Result := False;
+  if IntSize.Text = '' then
+  begin
+    AControl := IntSize;
+    AMsg := 'Interval size is not specified.';
+    exit;
+  end;
+  if not TryStrToFloat(IntSize.Text, f) then
+  begin
+    AControl := IntSize;
+    AMsg := 'No valid number given for interval size.';
+    exit;
+  end;
+  if NoInts.Text = '' then
+  begin
+    AControl := NoInts;
+    AMsg := 'Number of intervals not specified.';
+    exit;
+  end;
+  if not TryStrToInt(NoInts.Text, NoIntervals) then
+  begin
+    AControl := NoInts;
+    AMsg := 'No valid number given for number of intervals.';
+    exit;
+  end;
+  if NoIntervals + 1 > NoCases then begin
+    AControl := NoInts;
+    AMsg := Format('Number of intervals cannot be greater than the number of cases (%d).', [NoCases]);
+    exit;
+  end;
+  Result := true;
+end;
+
+procedure TFreqSpecsFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([OKBtn.Width, CancelBtn.Width, HelpBtn.Width]);
+  OKBtn.Constraints.MinWidth := w;
+  CancelBtn.Constraints.MinWidth := w;
+  HelpBtn.Constraints.MinWidth := w;
+  Constraints.MinHeight := Height;
+  Constraints.MaxHeight := Height;
+  HelpBtn.BorderSpacing.Left := NoInts.Left;
+
+  FAutoSized := true;
+end;
+
+procedure TFreqSpecsFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).tag);
+end;
+
+initialization
+  {$I freqspecsunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/frequnit.lfm

@@ -0,0 +1,283 @@
+object FreqFrm: TFreqFrm
+  Left = 490
+  Height = 388
+  Top = 228
+  Width = 502
+  Caption = 'Frequency Distribution'
+  ClientHeight = 388
+  ClientWidth = 502
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object PlotOptionsGroup: TRadioGroup
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 346
+    Height = 222
+    Top = 8
+    Width = 148
+    Anchors = [akTop, akRight]
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'Plot Options'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 202
+    ClientWidth = 144
+    ItemIndex = 0
+    Items.Strings = (
+      '2D Vertical Bars'
+      '3D Vertical Bars'
+      '2D Pie Chart'
+      'Exploded Pie Chart'
+      '2D Line Chart'
+      '3D Line Chart'
+      'Plot 2D Points'
+      'Plot 3D Points'
+      '2D Horizontal Bars'
+      '3D Horizontal Bars'
+    )
+    OnSelectionChanged = PlotOptionsGroupSelectionChanged
+    TabOrder = 1
+  end
+  object BarTypeGroup: TRadioGroup
+    AnchorSideLeft.Control = PlotOptionsGroup
+    AnchorSideTop.Control = PlotOptionsGroup
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = PlotOptionsGroup
+    AnchorSideRight.Side = asrBottom
+    Left = 346
+    Height = 70
+    Top = 242
+    Width = 148
+    Anchors = [akTop, akLeft, akRight]
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Top = 12
+    Caption = 'Bar Type'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 50
+    ClientWidth = 144
+    Enabled = False
+    ItemIndex = 0
+    Items.Strings = (
+      'Separated'
+      'Contiguous'
+    )
+    TabOrder = 2
+  end
+  object NormPltChk: TCheckBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 19
+    Top = 320
+    Width = 149
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Plot Normal Distribution'
+    TabOrder = 3
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = PlotOptionsGroup
+    AnchorSideBottom.Control = NormPltChk
+    Left = 8
+    Height = 304
+    Top = 8
+    Width = 330
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Around = 8
+    BevelOuter = bvNone
+    ClientHeight = 304
+    ClientWidth = 330
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Panel1
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 97
+      Caption = 'Available Variables'
+      ParentColor = False
+    end
+    object Label2: TLabel
+      AnchorSideLeft.Control = SelList
+      AnchorSideTop.Control = Panel1
+      Left = 196
+      Height = 15
+      Top = 0
+      Width = 104
+      Caption = 'Variables to Analyze'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Label1
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = AllBtn
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 287
+      Top = 17
+      Width = 134
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 0
+    end
+    object SelList: TListBox
+      AnchorSideLeft.Control = AllBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = Label2
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 196
+      Height = 287
+      Top = 17
+      Width = 134
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 2
+      ItemHeight = 0
+      OnSelectionChange = SelListSelectionChange
+      TabOrder = 4
+    end
+    object InBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      Left = 151
+      Height = 28
+      Top = 23
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = InBtnClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object OutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      Left = 151
+      Height = 28
+      Top = 56
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = OutBtnClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object AllBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      Left = 142
+      Height = 25
+      Top = 136
+      Width = 46
+      AutoSize = True
+      Caption = 'ALL'
+      OnClick = AllBtnClick
+      TabOrder = 3
+    end
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 339
+    Width = 502
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object ResetBtn: TButton
+    AnchorSideTop.Side = asrCenter
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 289
+    Height = 25
+    Top = 355
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 4
+  end
+  object CloseBtn: TButton
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Side = asrCenter
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 435
+    Height = 25
+    Top = 355
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 1
+    TabOrder = 5
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 351
+    Height = 25
+    Top = 355
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 6
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/frequnit.pas

@@ -0,0 +1,443 @@
+// Use "cansas.laz" for testing.
+
+unit FreqUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Buttons, ExtCtrls,
+  Globals, MainUnit, OutputUnit, FunctionsLib, GraphLib, DataProcs;
+
+type
+
+  { TFreqFrm }
+
+  TFreqFrm = class(TForm)
+    Bevel1: TBevel;
+    ComputeBtn: TButton;
+    Panel1: TPanel;
+    ResetBtn: TButton;
+    CloseBtn: TButton;
+    NormPltChk: TCheckBox;
+    InBtn: TBitBtn;
+    OutBtn: TBitBtn;
+    AllBtn: TBitBtn;
+    Label1: TLabel;
+    Label2: TLabel;
+    SelList: TListBox;
+    PlotOptionsGroup: TRadioGroup;
+    BarTypeGroup: TRadioGroup;
+    VarList: TListBox;
+    procedure AllBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure InBtnClick(Sender: TObject);
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure PlotOptionsGroupSelectionChanged(Sender: TObject);
+    procedure SelListSelectionChange(Sender: TObject; User: boolean);
+    procedure OutBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    procedure UpdateBtnStates;
+  public
+    { public declarations }
+  end; 
+
+var
+  FreqFrm: TFreqFrm;
+
+implementation
+
+uses
+  Math,
+  FreqSpecsUnit;
+
+{ TFreqFrm }
+
+procedure TFreqFrm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+
+begin
+  VarList.Clear;
+  SelList.Clear;
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  BarTypeGroup.ItemIndex := 0;
+  PlotOptionsGroup.ItemIndex := 0;
+  NormPltChk.Checked := false;
+  UpdateBtnStates;
+end;
+
+procedure TFreqFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+  Panel1.Constraints.MinHeight := BarTypeGroup.Top + BarTypeGroup.Height - Panel1.Top;
+  Panel1.Constraints.MinWidth := Label2.Width * 2 + AllBtn.Width + 2 * VarList.BorderSpacing.Right;
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+  FAutoSized := true;
+end;
+
+procedure TFreqFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+
+  if FreqSpecsFrm = nil then
+    Application.CreateForm(TFreqSpecsFrm, FreqSpecsFrm);
+
+  if GraphFrm = nil then
+    Application.CreateForm(TGraphFrm, GraphFrm);
+end;
+
+procedure TFreqFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TFreqFrm.AllBtnClick(Sender: TObject);
+var
+  count, index : integer;
+begin
+  count := VarList.Items.Count;
+  for index := 0 to count-1 do
+    SelList.Items.Add(VarList.Items[index]);
+  VarList.Clear;
+  UpdateBtnStates;
+end;
+
+procedure TFreqFrm.InBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while i < VarList.Items.Count do
+  begin
+    if (VarList.Selected[i]) then
+    begin
+      SelList.Items.Add(VarList.Items[i]);
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      i := i + 1;
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TFreqFrm.SelListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+procedure TFreqFrm.ComputeBtnClick(Sender: TObject);
+var
+   i, j, k : integer;
+   freq : DblDyneVec;
+   pcnt : DblDyneVec;
+   cumpcnt : DblDyneVec;
+   pcntilerank : DblDyneVec;
+   cumfreq : DblDyneVec;
+   XValue : DblDyneVec;
+   value : double;
+   NoVars : integer;
+   plottype : integer;
+   cellval : string;
+   col : integer;
+   min, max : double;
+   range : double;
+   incrsize : double;
+   nointervals : double;
+   nints : integer;
+//   ColNoSelected : IntDyneVec;
+   NormDist : boolean;
+   Histogram : boolean;
+   Sumx, Sumx2, Mean, Variance, StdDev, zlow, zhi : double;
+   X, zproplow, zprophi, zfreq : double;
+   Ncases : integer;
+   lReport: TStrings;
+
+begin
+  if BarTypeGroup.ItemIndex = 1 then Histogram := true else Histogram := false;
+  if NormPltChk.Checked = true then NormDist := true else NormDist := false;
+
+  SetLength(freq,NoCases);
+  SetLength(pcnt,NoCases);
+  SetLength(cumpcnt,NoCases);
+  SetLength(pcntilerank,NoCases);
+  SetLength(cumfreq,NoCases);
+  SetLength(XValue,NoCases);
+
+  lReport := TStringList.Create;
+  try
+    lReport.Add('FREQUENCY ANALYSIS BY BILL MILLER');
+    lReport.Add('');
+
+    { Analyze each variable }
+    NoVars := SelList.Items.Count;
+    for i := 1 to NoVars do
+    begin
+      { get column no. of variable }
+      col := 1;
+      cellval := SelList.Items.Strings[i-1];
+      for j := 1 to NoVariables do
+      begin
+        if OS3MainFrm.DataGrid.Cells[j,0] = cellval then
+        begin
+          col := j;
+          lReport.Add('Frequency Analysis for Variable "%s"', [cellval]);
+          break;
+        end;
+      end;
+
+      { get min and max values for variable in col }
+      min := 1.0e32;
+      max := -1.0e32;
+      for j := 1 to NoCases do
+      begin
+        if not ValidValue(j,col) then continue;
+        value := StrToFloat(OS3MainFrm.DataGrid.Cells[col,j]);
+        if value > max then max := value;
+        if value < min then min := value;
+      end;
+      range := max - min + 1.0;
+      incrsize := 1.0;
+      { if too many increments, set increment size for 15 increments }
+      if range > 200.0 then incrsize := range / 15;
+      nointervals := range / incrsize;
+      nints := round(nointervals);
+
+      { Get user's approval and / or changes }
+      FreqSpecsFrm.VarName.Text := cellval;
+      FreqSpecsFrm.Minimum.Text := FloatToStr(min);
+      FreqSpecsFrm.Maximum.Text := FloatToStr(max);
+      FreqSpecsFrm.range.Text := FloatToStr(range);
+      FreqSpecsFrm.IntSize.Text := FloatToStr(incrsize);
+      FreqSpecsFrm.NoInts.Text := IntToStr(nints);
+      FreqSpecsFrm.NoCases := NoCases;
+      if FreqSpecsFrm.ShowModal <> mrOK then
+        exit;
+
+      incrsize := StrToFloat(FreqSpecsFrm.IntSize.Text);
+      nints := StrToInt(FreqSpecsFrm.NoInts.Text);
+      if nints > 200 then
+        nints := 200;
+
+      {Now, get frequency of cases in each interval }
+      for j := 1 to nints+1 do
+        freq[j-1] := 0;
+      Ncases := 0;
+      for j := 1 to NoCases do
+      begin
+        if not ValidValue(j,col) then continue;
+        inc(Ncases);
+        value := StrToFloat(OS3MainFrm.DataGrid.Cells[col,j]);
+        for k := 1 to nints do
+        begin
+          if (value >= min + ((k-1) * incrsize)) and
+             (value < min + (k * incrsize)) then freq[k-1] := freq[k-1] + 1;
+        end;
+      end;
+      for j := 1 to nints+1 do
+        XValue[j-1] := min + (j-1) * incrsize;
+
+      { get cumulative frequencies and percents to midpoints }
+      cumfreq[0] := freq[0];
+      pcnt[0] := freq[0] / Ncases;
+      cumpcnt[0] := cumfreq[0] / Ncases;
+      pcntilerank[0] := (freq[0] / 2.0) / Ncases;
+      for k := 2 to nints do
+      begin
+        cumfreq[k-1] := cumfreq[k-2] + freq[k-1];
+        pcnt[k-1] := freq[k-1] / Ncases;
+        cumpcnt[k-1] := cumfreq[k-1] / Ncases;
+        pcntilerank[k-1] := (cumfreq[k-2] + freq[k-1] / 2.0) / Ncases;
+      end;
+
+      { Now, print results to report }
+      lReport.Add('    FROM    TO      FREQ.   PCNT    CUM.FREQ. CUM.PCNT. %ILE RANK');
+      lReport.Add('');
+      for k := 1 to nints do
+        lReport.Add('%8.2f%8.2f%8.0f%8.2f  %8.2f  %8.2f  %8.2f', [
+          min+(k-1)*incrsize,    // from
+          min+k*incrsize,        // to
+          freq[k-1],             // freq
+          pcnt[k-1],             // pcnt
+          cumfreq[k-1],          // cum.freq.
+          cumpcnt[k-1],          // cum.pcnt.
+          pcntilerank[k-1]       // %ile rank
+        ]);
+
+      { Now, prepare plot values as indicated in options list }
+      if NormDist = false then
+        SetLength(GraphFrm.Ypoints,1,nints+1)
+      else
+        SetLength(GraphFrm.Ypoints,2,nints+1);
+      SetLength(GraphFrm.Xpoints,1,nints+1);
+      for k := 1 to nints+1 do
+      begin
+        GraphFrm.Ypoints[0,k-1] := freq[k-1];
+        GraphFrm.Xpoints[0,k-1] := XValue[k-1];
+      end;
+
+      // Create ND plot if checked.
+      // BUT: Only 3D-vertical plots when normal curve is desired
+      if NormDist then
+      begin
+        lReport.Add('');
+        lReport.Add('Interval ND Freq.');
+        // Only use 3Dvertical plots when normal curve desired
+        PlotOptionsGroup.ItemIndex := 1;
+        // get mean and standard deviation of xvalues, then height of
+        // the normal curve for each Normally distributed corresponding z score
+        sumx := 0.0;
+        sumx2 := 0.0;
+        for k := 1 to nints do
+        begin
+          sumx := sumx + (XValue[k-1] * freq[k-1]);
+          sumx2 := sumx2 + ((XValue[k-1] * XValue[k-1]) * freq[k-1]);
+        end;
+        Mean := sumx / Ncases;
+        Variance := sumx2 - ((sumx * sumx) / Ncases);
+        Variance := Variance / (Ncases - 1);
+        StdDev := sqrt(Variance);
+        for k := 1 to nints+1 do
+        begin
+          X := XValue[k-1] - (incrsize / 2.0);
+          if StdDev > 0.0 then
+            zlow := (X - Mean) / StdDev
+          else
+            zlow := 0.0;
+          X := XValue[k-1] + (incrsize / 2.0);
+          if StdDev > 0.0 then
+            zhi := (X - Mean) / StdDev
+          else
+            zhi := 0.0;
+
+          // get cum. prop. for this z and translate to frequency
+          zproplow := probz(zlow);
+          zprophi := probz(zhi);
+          zfreq := NoCases * abs(zprophi - zproplow);
+          GraphFrm.Ypoints[1,k-1] := zfreq;
+          lReport.Add('    %2d      %6.2f', [k, GraphFrm.Ypoints[1,k-1]]);
+        end;
+      end;
+
+      // Show report in form
+      DisplayReport(lReport);
+
+      // Plot data
+      plottype := PlotOptionsGroup.ItemIndex + 1;
+      if Histogram then
+        GraphFrm.barwideprop := 1.0
+      else
+        GraphFrm.barwideprop := 0.5;
+      if NormDist then
+        GraphFrm.nosets := 2
+      else
+        GraphFrm.nosets := 1;
+      GraphFrm.nbars := nints+1;
+      GraphFrm.Heading := cellval;
+      GraphFrm.XTitle := 'Lower Limit Values';
+      GraphFrm.YTitle := 'Frequency';
+      GraphFrm.AutoScaled := true;
+      GraphFrm.GraphType := plotType;
+      GraphFrm.BackColor := clCream;
+      GraphFrm.WallColor := clDkGray;
+      GraphFrm.FloorColor := clLtGray;
+      GraphFrm.ShowBackWall := true;
+      if plotType in [2, 6, 8, 10] then
+      begin
+        GraphFrm.ShowLeftWall := true;
+        GraphFrm.ShowRightWall := true;
+        GraphFrm.ShowBottomWall := true;
+      end;
+      GraphFrm.ShowModal;
+      GraphFrm.Xpoints := nil;
+      GraphFrm.Ypoints := nil;
+    end; // for novars list
+
+  finally
+    lReport.Free;
+    XValue := nil;
+    cumfreq := nil;
+    pcntilerank := nil;
+    cumpcnt := nil;
+    pcnt := nil;
+    freq := nil;
+  end;
+end;
+
+procedure TFreqFrm.OutBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while i < SelList.Items.Count do
+  begin
+    if (SelList.Selected[i]) then
+    begin
+      VarList.Items.Add(SelList.Items[i]);
+      SelList.Items.Delete(i);
+      i := 0;
+    end else
+      i := i + 1;
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TFreqFrm.PlotOptionsGroupSelectionChanged(Sender: TObject);
+begin
+   BarTypeGroup.Enabled := PlotOptionsGroup.ItemIndex in [0, 1, 8, 9];  // Bar series only
+end;
+
+procedure TFreqFrm.UpdateBtnStates;
+var
+  lSelected: Boolean;
+  i: Integer;
+begin
+  lSelected := false;
+  for i := 0 to VarList.Items.Count-1 do
+    if VarList.Selected[i] then
+    begin
+      lSelected := true;
+      Break;
+    end;
+  InBtn.Enabled := lSelected;
+
+  lSelected := false;
+  for i := 0 to SelList.Items.Count-1 do
+    if SelList.Selected[i] then
+    begin
+      lSelected := true;
+      break;
+    end;
+  OutBtn.Enabled := lSelected;
+
+  AllBtn.Enabled := VarList.Items.Count > 0;
+end;
+
+procedure TFreqFrm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+initialization
+  {$I frequnit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/groupfrequnit.lfm

@@ -0,0 +1,219 @@
+object GroupFreqForm: TGroupFreqForm
+  Left = 513
+  Height = 341
+  Top = 233
+  Width = 444
+  AutoSize = True
+  Caption = 'Group Frequency Analysis'
+  ClientHeight = 341
+  ClientWidth = 444
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = ResetBtnClick
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Memo1
+    AnchorSideTop.Side = asrBottom
+    Left = 8
+    Height = 15
+    Top = 84
+    Width = 100
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 16
+    Caption = 'Available Variables:'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = GrpInBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideBottom.Control = GrpVarEdit
+    Left = 237
+    Height = 15
+    Top = 109
+    Width = 77
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 12
+    BorderSpacing.Bottom = 2
+    Caption = 'Group Variable'
+    ParentColor = False
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = GrpInBtn
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 191
+    Top = 101
+    Width = 181
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    ItemHeight = 0
+    OnSelectionChange = VarListSelectionChange
+    TabOrder = 0
+  end
+  object GrpInBtn: TBitBtn
+    AnchorSideLeft.Control = PlotOptionsBox
+    AnchorSideTop.Control = VarList
+    Left = 197
+    Height = 28
+    Top = 101
+    Width = 28
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = GrpInBtnClick
+    Spacing = 0
+    TabOrder = 1
+  end
+  object GrpOutBtn: TBitBtn
+    AnchorSideLeft.Control = GrpInBtn
+    AnchorSideTop.Control = GrpInBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 197
+    Height = 28
+    Top = 133
+    Width = 28
+    BorderSpacing.Top = 4
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = GrpOutBtnClick
+    Spacing = 0
+    TabOrder = 2
+  end
+  object GrpVarEdit: TEdit
+    AnchorSideLeft.Control = Label2
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = GrpOutBtn
+    AnchorSideBottom.Side = asrBottom
+    Left = 237
+    Height = 23
+    Top = 126
+    Width = 199
+    Anchors = [akLeft, akRight, akBottom]
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 12
+    ReadOnly = True
+    TabOrder = 3
+    Text = 'GrpVarEdit'
+  end
+  object ResetBtn: TButton
+    AnchorSideTop.Control = CloseBtn
+    AnchorSideRight.Control = ComputeBtn
+    Left = 235
+    Height = 25
+    Top = 308
+    Width = 54
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 5
+  end
+  object ComputeBtn: TButton
+    AnchorSideTop.Control = CloseBtn
+    AnchorSideRight.Control = CloseBtn
+    Left = 297
+    Height = 25
+    Top = 308
+    Width = 76
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 6
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 381
+    Height = 25
+    Top = 308
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 7
+  end
+  object PlotOptionsBox: TRadioGroup
+    AnchorSideLeft.Control = GrpInBtn
+    AnchorSideTop.Control = GrpOutBtn
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 197
+    Height = 114
+    Top = 177
+    Width = 239
+    Anchors = [akTop, akRight]
+    AutoFill = True
+    AutoSize = True
+    BorderSpacing.Top = 16
+    BorderSpacing.Right = 8
+    Caption = 'Plot Options:'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsHomogenousChildResize
+    ChildSizing.EnlargeVertical = crsHomogenousChildResize
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 1
+    ClientHeight = 94
+    ClientWidth = 235
+    Items.Strings = (
+      'Plot means using 2D Horizontal Bars'
+      'Plot means using 3D Horizontal Bars'
+      'Plot means using 2D Vertical Bars'
+      'Plot means using 3D Vertical Bars'
+    )
+    TabOrder = 4
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 292
+    Width = 444
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Memo1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 8
+    Height = 60
+    Top = 8
+    Width = 428
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'This procedure plots the frequency of cases in each of the groups in a group variable.  The group variable should be defined as an integer variable.'#13#10#13#10'Select the variable and type of plot and click the Compute button for the results.'
+    ParentColor = False
+    WordWrap = True
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/groupfrequnit.pas

@@ -0,0 +1,235 @@
+unit GroupFreqUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Buttons, ExtCtrls,
+  MainUnit, GraphLib, Globals, DataProcs;
+
+type
+
+  { TGroupFreqForm }
+
+  TGroupFreqForm = class(TForm)
+    Bevel1: TBevel;
+    GrpInBtn: TBitBtn;
+    GrpOutBtn: TBitBtn;
+    ComputeBtn: TButton;
+    GrpVarEdit: TEdit;
+    Label1: TLabel;
+    Label2: TLabel;
+    Memo1: TLabel;
+    PlotOptionsBox: TRadioGroup;
+    ResetBtn: TButton;
+    CloseBtn: TButton;
+    VarList: TListBox;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure GrpInBtnClick(Sender: TObject);
+    procedure GrpOutBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    procedure UpdateBtnStates;
+  public
+    { public declarations }
+  end; 
+
+var
+  GroupFreqForm: TGroupFreqForm;
+
+implementation
+
+uses
+  Math;
+
+{ TGroupFreqForm }
+
+procedure TGroupFreqForm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  VarList.Clear;
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  GrpVarEdit.Text := '';
+  UpdateBtnStates;
+end;
+
+procedure TGroupFreqForm.GrpInBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if (index > -1) and (GrpVarEdit.Text = '') then
+  begin
+    GrpVarEdit.Text := VarList.Items[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TGroupFreqForm.ComputeBtnClick(Sender: TObject);
+VAR
+  nogroups, mingrp, maxgrp, grpcol, value, minfreq, maxfreq: integer;
+  labelstr: string;
+  i: integer;
+  strvalue: string;
+  freq: IntDyneVec;
+  plottype: integer;
+begin
+  // get the variable to analyze
+  grpcol := 0;
+  for i := 1 to NoVariables do
+  begin
+    strvalue := OS3MainFrm.DataGrid.Cells[i,0];
+    if GrpVarEdit.Text = strvalue then
+    begin
+      grpcol := i;
+      break;
+    end;
+  end;
+  if grpcol = 0 then
+  begin
+     MessageDlg('No variable selected.', mtError, [mbOK], 0);
+     exit;
+  end;
+
+  labelstr := GrpVarEdit.Text;
+  mingrp := 1000;
+  maxgrp := -1000;
+  for i := 1 to NoCases do
+  begin
+    if not ValidValue(i,grpcol) then continue;
+    value := round(StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[grpcol,i])));
+    if value < mingrp then mingrp := value;
+    if value > maxgrp then maxgrp := value;
+  end;
+  nogroups := maxgrp - mingrp + 1;
+  if nogroups < 2 then
+  begin
+    MessageDlg('One or fewer groups found.', mtError, [mbOK], 0);
+    exit;
+  end;
+
+  // setup frequency array and count cases in each group
+  SetLength(freq,NoGroups+1);
+  for i := 0 to NoGroups do
+    freq[i] := 0;
+  for i := 1 to NoCases do
+  begin
+    if not ValidValue(i,grpcol) then continue;
+    value := round(StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[grpcol,i])));
+    value := value - mingrp;
+    freq[value] := freq[value] + 1;
+  end;
+
+  // get min and max frequencies and check for existence of a range
+  minfreq := 10000;
+  maxfreq := -10000;
+  for i := 0 to NoGroups-1 do
+  begin
+    if freq[i] < minfreq then minfreq := freq[i];
+    if freq[i] > maxfreq then maxfreq := freq[i];
+  end;
+  if minfreq = maxfreq then
+  begin
+    MessageDlg('All groups have equal frequencies.  Cannot plot.', mtInformation, [mbOK], 0);
+    freq := nil;
+    exit;
+  end;
+
+  case PlotOptionsBox.ItemIndex of
+    0: plottype := 9;
+    1: plottype := 10;
+    2: plottype := 1;
+    3: plottype := 2;
+  end;
+
+  // plot the frequencies
+  SetLength(GraphFrm.Xpoints,1,nogroups+1);
+  SetLength(GraphFrm.Ypoints,1,nogroups+1);
+  GraphFrm.nosets := 1;
+  GraphFrm.nbars := nogroups;
+  GraphFrm.Heading := 'Frequency Distribution';
+  GraphFrm.XTitle := 'Values of ' + labelstr;
+  GraphFrm.YTitle := 'Frequency';
+  GraphFrm.barwideprop := 0.5;
+  GraphFrm.AutoScaled := false;
+  GraphFrm.miny := 0.0;
+  GraphFrm.maxy := maxfreq;
+  GraphFrm.GraphType := plottype;
+  GraphFrm.BackColor := clCream; // clYellow;
+  GraphFrm.WallColor := clDkGray; //Black;
+  GraphFrm.FloorColor := clLtGray;
+  GraphFrm.ShowBackWall := true;
+  for i := 0 to nogroups do
+  begin
+    GraphFrm.Ypoints[0,i] := freq[i];
+    GraphFrm.Xpoints[0,i] := mingrp + i;
+  end;
+  GraphFrm.ShowModal;
+  GraphFrm.Xpoints := nil;
+  GraphFrm.Ypoints := nil;
+end;
+
+procedure TGroupFreqForm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  VarList.Constraints.MinHeight := PlotOptionsBox.Top + PlotOptionsBox.Height - VarList.Top;
+  Varlist.Constraints.MinWidth := Label1.Width * 3 div 2;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TGroupFreqForm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if GraphFrm = nil then Application.CreateForm(TGraphFrm, GraphFrm);
+end;
+
+procedure TGroupFreqForm.GrpOutBtnClick(Sender: TObject);
+begin
+  if GrpVarEdit.Text <> '' then
+  begin
+    VarList.Items.Add(GrpVarEdit.Text);
+    GrpVarEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TGroupFreqForm.UpdateBtnStates;
+begin
+  GrpInBtn.Enabled := VarList.ItemIndex > -1;
+  GrpOutBtn.Enabled := (GrpVarEdit.Text <> '');
+end;
+
+procedure TGroupFreqForm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+
+initialization
+  {$I groupfrequnit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/multxvsyunit.lfm

@@ -0,0 +1,421 @@
+object MultXvsYFrm: TMultXvsYFrm
+  Left = 814
+  Height = 416
+  Top = 216
+  Width = 395
+  Anchors = [akLeft]
+  AutoSize = True
+  Caption = 'Multiple X Versus Y Plot'
+  ClientHeight = 416
+  ClientWidth = 395
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Bevel1: TBevel
+    AnchorSideTop.Control = LabelEdit
+    Left = 0
+    Height = 8
+    Top = 367
+    Width = 395
+    Align = alBottom
+    Shape = bsBottomLine
+  end
+  object Panel2: TPanel
+    Left = 8
+    Height = 328
+    Top = 8
+    Width = 379
+    Align = alClient
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BevelOuter = bvNone
+    ClientHeight = 328
+    ClientWidth = 379
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideLeft.Control = Panel2
+      AnchorSideTop.Control = Panel2
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 100
+      Caption = 'Available Variables:'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel2
+      AnchorSideTop.Control = Label1
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideBottom.Control = Panel2
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 311
+      Top = 17
+      Width = 190
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      ItemHeight = 0
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 0
+    end
+    object Panel1: TPanel
+      AnchorSideTop.Control = VarList
+      AnchorSideRight.Control = Panel2
+      AnchorSideRight.Side = asrBottom
+      Left = 198
+      Height = 310
+      Top = 17
+      Width = 181
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BevelOuter = bvNone
+      ClientHeight = 310
+      ClientWidth = 181
+      TabOrder = 1
+      object Label2: TLabel
+        AnchorSideLeft.Control = XEdit
+        AnchorSideBottom.Control = XEdit
+        Left = 36
+        Height = 15
+        Top = 8
+        Width = 51
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'X Variable'
+        ParentColor = False
+      end
+      object Label3: TLabel
+        AnchorSideLeft.Control = YEdit
+        AnchorSideBottom.Control = YEdit
+        Left = 36
+        Height = 15
+        Top = 92
+        Width = 51
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Y Variable'
+        ParentColor = False
+      end
+      object Label4: TLabel
+        AnchorSideLeft.Control = GroupEdit
+        AnchorSideBottom.Control = GroupEdit
+        Left = 36
+        Height = 15
+        Top = 176
+        Width = 77
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Bottom = 2
+        Caption = 'Group Variable'
+        ParentColor = False
+      end
+      object XInBtn: TBitBtn
+        AnchorSideLeft.Control = Panel1
+        AnchorSideTop.Control = Panel1
+        Left = 0
+        Height = 28
+        Top = 0
+        Width = 28
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = XInBtnClick
+        Spacing = 0
+        TabOrder = 0
+      end
+      object XOutBtn: TBitBtn
+        AnchorSideLeft.Control = Panel1
+        AnchorSideTop.Control = XInBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 0
+        Height = 28
+        Top = 32
+        Width = 28
+        BorderSpacing.Top = 4
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = XOutBtnClick
+        Spacing = 0
+        TabOrder = 1
+      end
+      object YInBtn: TBitBtn
+        AnchorSideLeft.Control = Panel1
+        AnchorSideTop.Control = XOutBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 0
+        Height = 28
+        Top = 84
+        Width = 28
+        BorderSpacing.Top = 24
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = YInBtnClick
+        Spacing = 0
+        TabOrder = 3
+      end
+      object YOutBtn: TBitBtn
+        AnchorSideLeft.Control = Panel1
+        AnchorSideTop.Control = YInBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 0
+        Height = 28
+        Top = 116
+        Width = 28
+        BorderSpacing.Top = 4
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = YOutBtnClick
+        Spacing = 0
+        TabOrder = 4
+      end
+      object GroupInBtn: TBitBtn
+        AnchorSideLeft.Control = Panel1
+        AnchorSideTop.Control = YOutBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 0
+        Height = 28
+        Top = 168
+        Width = 28
+        BorderSpacing.Top = 24
+        Images = MainDataModule.ImageList
+        ImageIndex = 1
+        OnClick = GroupInBtnClick
+        Spacing = 0
+        TabOrder = 6
+      end
+      object GroupOutBtn: TBitBtn
+        AnchorSideLeft.Control = Panel1
+        AnchorSideTop.Control = GroupInBtn
+        AnchorSideTop.Side = asrBottom
+        Left = 0
+        Height = 28
+        Top = 200
+        Width = 28
+        BorderSpacing.Top = 4
+        BorderSpacing.Bottom = 8
+        Images = MainDataModule.ImageList
+        ImageIndex = 0
+        OnClick = GroupOutBtnClick
+        Spacing = 0
+        TabOrder = 7
+      end
+      object XEdit: TEdit
+        AnchorSideLeft.Control = XInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = XOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 36
+        Height = 23
+        Top = 25
+        Width = 145
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        ReadOnly = True
+        TabOrder = 2
+        Text = 'XEdit'
+      end
+      object YEdit: TEdit
+        AnchorSideLeft.Control = XInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = YOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 36
+        Height = 23
+        Top = 109
+        Width = 145
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        ReadOnly = True
+        TabOrder = 5
+        Text = 'YEdit'
+      end
+      object GroupEdit: TEdit
+        AnchorSideLeft.Control = XInBtn
+        AnchorSideLeft.Side = asrBottom
+        AnchorSideRight.Control = Panel1
+        AnchorSideRight.Side = asrBottom
+        AnchorSideBottom.Control = GroupOutBtn
+        AnchorSideBottom.Side = asrBottom
+        Left = 36
+        Height = 23
+        Top = 193
+        Width = 145
+        Anchors = [akLeft, akBottom]
+        BorderSpacing.Left = 8
+        BorderSpacing.Bottom = 12
+        ReadOnly = True
+        TabOrder = 8
+        Text = 'GroupEdit'
+      end
+      object GroupBox1: TGroupBox
+        AnchorSideLeft.Control = Panel1
+        AnchorSideTop.Control = GroupOutBtn
+        AnchorSideTop.Side = asrBottom
+        AnchorSideRight.Side = asrBottom
+        Left = 0
+        Height = 70
+        Top = 240
+        Width = 181
+        AutoSize = True
+        BorderSpacing.Top = 12
+        Caption = 'Options:'
+        ClientHeight = 50
+        ClientWidth = 177
+        TabOrder = 9
+        object DescChk: TCheckBox
+          AnchorSideLeft.Control = GroupBox1
+          AnchorSideTop.Control = GroupBox1
+          Left = 12
+          Height = 19
+          Top = 2
+          Width = 159
+          BorderSpacing.Left = 12
+          BorderSpacing.Top = 2
+          BorderSpacing.Bottom = 2
+          Caption = 'Show Descriptive Statistics'
+          TabOrder = 0
+        end
+        object LinesChk: TCheckBox
+          AnchorSideLeft.Control = DescChk
+          AnchorSideTop.Control = DescChk
+          AnchorSideTop.Side = asrBottom
+          Left = 12
+          Height = 19
+          Top = 23
+          Width = 157
+          BorderSpacing.Right = 8
+          BorderSpacing.Bottom = 8
+          Caption = 'Connect Points with Lines'
+          TabOrder = 1
+        end
+      end
+    end
+  end
+  object Panel3: TPanel
+    Left = 0
+    Height = 41
+    Top = 375
+    Width = 395
+    Align = alBottom
+    AutoSize = True
+    BevelOuter = bvNone
+    ClientHeight = 41
+    ClientWidth = 395
+    TabOrder = 2
+    object ResetBtn: TButton
+      AnchorSideRight.Control = ComputeBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 178
+      Height = 25
+      Top = 8
+      Width = 54
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Top = 8
+      BorderSpacing.Right = 12
+      BorderSpacing.Bottom = 8
+      Caption = 'Reset'
+      OnClick = ResetBtnClick
+      TabOrder = 1
+    end
+    object ComputeBtn: TButton
+      AnchorSideRight.Control = CloseBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 244
+      Height = 25
+      Top = 8
+      Width = 76
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Top = 8
+      BorderSpacing.Right = 12
+      BorderSpacing.Bottom = 8
+      Caption = 'Compute'
+      OnClick = ComputeBtnClick
+      TabOrder = 2
+    end
+    object CloseBtn: TButton
+      AnchorSideRight.Control = Panel3
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Side = asrBottom
+      Left = 332
+      Height = 25
+      Top = 8
+      Width = 55
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Top = 8
+      BorderSpacing.Right = 8
+      BorderSpacing.Bottom = 8
+      Caption = 'Close'
+      ModalResult = 11
+      TabOrder = 3
+    end
+    object HelpBtn: TButton
+      Tag = 134
+      AnchorSideRight.Control = ResetBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 115
+      Height = 25
+      Top = 8
+      Width = 51
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 8
+      BorderSpacing.Right = 12
+      BorderSpacing.Bottom = 8
+      Caption = 'Help'
+      OnClick = HelpBtnClick
+      TabOrder = 0
+    end
+  end
+  object Panel4: TPanel
+    Left = 8
+    Height = 23
+    Top = 344
+    Width = 379
+    Align = alBottom
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BevelOuter = bvNone
+    ClientHeight = 23
+    ClientWidth = 379
+    TabOrder = 1
+    object Label5: TLabel
+      AnchorSideLeft.Control = Panel4
+      AnchorSideTop.Control = LabelEdit
+      AnchorSideTop.Side = asrCenter
+      Left = 0
+      Height = 15
+      Top = 4
+      Width = 46
+      Caption = 'Plot Title'
+      ParentColor = False
+    end
+    object LabelEdit: TEdit
+      AnchorSideLeft.Control = Label5
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = Panel4
+      AnchorSideRight.Control = Panel4
+      AnchorSideRight.Side = asrBottom
+      Left = 54
+      Height = 23
+      Top = 0
+      Width = 325
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Left = 8
+      TabOrder = 0
+      TextHint = 'Text above the plot'
+    end
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/multxvsyunit.pas

@@ -0,0 +1,509 @@
+// Use file "BubblePlot2.laz" for testing
+
+unit MultXvsYUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls, Buttons, Clipbrd,
+  MainUnit, Globals, OutputUnit, DataProcs, DictionaryUnit, ContextHelpUnit;
+
+type
+
+  { TMultXvsYFrm }
+
+  TMultXvsYFrm = class(TForm)
+    Bevel1: TBevel;
+    HelpBtn: TButton;
+    Panel1: TPanel;
+    Panel2: TPanel;
+    Panel3: TPanel;
+    Panel4: TPanel;
+    XInBtn: TBitBtn;
+    XOutBtn: TBitBtn;
+    YInBtn: TBitBtn;
+    YOutBtn: TBitBtn;
+    GroupInBtn: TBitBtn;
+    GroupOutBtn: TBitBtn;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    CloseBtn: TButton;
+    DescChk: TCheckBox;
+    LinesChk: TCheckBox;
+    XEdit: TEdit;
+    YEdit: TEdit;
+    GroupEdit: TEdit;
+    GroupBox1: TGroupBox;
+    LabelEdit: TEdit;
+    Label1: TLabel;
+    Label2: TLabel;
+    Label3: TLabel;
+    Label4: TLabel;
+    Label5: TLabel;
+    VarList: TListBox;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure GroupInBtnClick(Sender: TObject);
+    procedure GroupOutBtnClick(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+    procedure XInBtnClick(Sender: TObject);
+    procedure XOutBtnClick(Sender: TObject);
+    procedure YInBtnClick(Sender: TObject);
+    procedure YOutBtnClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    procedure PlotXY(var XValues: DblDyneMat; YValues: DblDyneMat;
+      MaxX, MinX, MaxY, MinY: double; N, NoY, MinGrp: integer);
+    procedure UpdateBtnStates;
+
+  public
+    { public declarations }
+  end; 
+
+var
+  MultXvsYFrm: TMultXvsYFrm;
+
+implementation
+
+uses
+  Math,
+  BlankFrmUnit;
+
+{ TMultXvsYFrm }
+
+procedure TMultXvsYFrm.ResetBtnClick(Sender: TObject);
+VAR i : integer;
+begin
+        VarList.Clear;
+        for i := 1 to NoVariables do
+          VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+        XEdit.Text := '';
+        YEdit.Text := '';
+        GroupEdit.Text := '';
+        DescChk.Checked := false;
+        LinesChk.Checked := false;
+        XInBtn.Enabled := true;
+        YInBtn.Enabled := true;
+        GroupInBtn.Enabled := true;
+        XOutBtn.Enabled := false;
+        YOutBtn.Enabled := false;
+        GroupOutBtn.Enabled := false;
+end;
+
+procedure TMultXvsYFrm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+procedure TMultXvsYFrm.GroupInBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := VarList.ItemIndex;
+  if (i > -1) and (GroupEdit.Text = '') then
+  begin
+    GroupEdit.Text := VarList.Items[i];
+    VarList.Items.Delete(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TMultXvsYFrm.ComputeBtnClick(Sender: TObject);
+var
+  i, j, k, N, NoGrps, XCol, YCol, GrpCol, Grp, MinGrp, MaxGrp: integer;
+  NoSelected, MaxGrpSize: integer;
+  selected, NoInGrp: IntDyneVec;
+  YValues, XValues: DblDyneMat;
+  Means, StdDevs: DblDyneVec;
+  MinX, MaxX, MinY, MaxY, X, Y, temp: double;
+  cellstring: string;
+  lReport: TStrings;
+begin
+  MaxGrpSize := 0;
+  SetLength(selected, 3);
+  MaxX := -1.0e308;
+  MinX := 1.0e308;
+  MaxY := -1.0e308;
+  MinY := 1.0e308;
+  MinGrp := MaxInt;
+  MaxGrp := -MaxInt;
+  XCol := 0;
+  YCol := 0;
+  GrpCol := 0;
+  N := 0;
+
+  // Get selected variables
+  for i := 1 to NoVariables do
+  begin
+    cellstring  :=  OS3MainFrm.DataGrid.Cells[i,0];
+    if (cellstring = XEdit.Text) then selected[0] := i;
+    if (cellstring = YEdit.Text) then selected[1] := i;
+    if (cellstring = GroupEdit.Text) then selected[2] := i;
+  end;
+
+  XCol := selected[0];
+  YCol := selected[1];
+  GrpCol := selected[2];
+  NoSelected := 3;
+
+  if (XCol = 0) or (YCol = 0) or (GrpCol = 0) then
+  begin
+    MessageDlg('No variable selected.', mtError, [mbOK], 0);
+    exit;
+  end;
+
+  // Get number of groups
+  for i := 1 to NoCases do
+  begin
+    Grp := StrToInt(OS3MainFrm.DataGrid.Cells[GrpCol,i]);
+    if (Grp > MaxGrp) then MaxGrp := Grp;
+    if (Grp < MinGrp) then MinGrp := Grp;
+  end;
+  NoGrps := (MaxGrp - MinGrp) + 1;
+
+  lReport := TStringList.Create;
+  try
+    lReport.Add('X VERSUS Y FOR GROUPS PLOT');
+    lReport.Add('');
+
+    SetLength(YValues, NoCases+1, NoGrps+1);
+    SetLength(XValues, NoCases+1, NoGrps+1);
+    SetLength(Means, 2);
+    SetLength(StdDevs, 2);
+    SetLength(NoInGrp, NoGrps);
+
+    for i := 0 to 1 do
+    begin
+      Means[i] := 0.0;
+      StdDevs[i] := 0.0;
+    end;
+    for i := 0 to NoGrps - 1 do
+      NoInGrp[i] := 0;
+
+    for i := 1 to NoCases do
+    begin
+      if (not GoodRecord(i,NoSelected,selected))then continue;
+      inc(N);
+      X := StrToFloat(OS3MainFrm.DataGrid.Cells[XCol,i]);
+      if (X > MaxX) then MaxX := X;
+      if (X < MinX) then MinX := X;
+
+      Y := StrToFloat(OS3MainFrm.DataGrid.Cells[YCol,i]);
+      if (Y > MaxY) then MaxY := Y;
+      if (Y < MinY) then MinY := Y;
+
+      Grp := StrToInt(OS3MainFrm.DataGrid.Cells[GrpCol,i]);
+      Grp := Grp - MinGrp;
+      NoInGrp[Grp] := NoInGrp[Grp] + 1;
+      if (NoInGrp[Grp] > MaxGrpSize) then MaxGrpSize := NoInGrp[Grp];
+      YValues[NoInGrp[Grp]-1,Grp] := Y;
+      XValues[NoInGrp[Grp]-1,Grp] := StrToFloat(OS3MainFrm.DataGrid.Cells[XCol,i]);
+    end;
+
+    // get descriptive data
+    if (DescChk.Checked) then
+    begin
+      for i := 1 to NoCases do
+      begin
+        if (not GoodRecord(i,NoSelected,selected)) then continue;
+        Y := StrToFloat(OS3MainFrm.DataGrid.Cells[YCol,i]);
+        X := StrToFloat(OS3MainFrm.DataGrid.Cells[XCol,i]);
+        Means[0] := Means[0] + X;
+        StdDevs[0] := StdDevs[0] + X * X;
+        Means[1] :=  Means[1] + Y;
+        StdDevs[1] := StdDevs[1] + Y * Y;
+      end;
+
+      for i := 0 to 1 do
+      begin
+        StdDevs[i] := StdDevs[i] - (Means[i] * Means[i]) / N;
+        StdDevs[i] := sqrt(StdDevs[i] / (N - 1));
+        Means[i] := Means[i] / N;
+      end;
+
+      lReport.Add('VARIABLE    MEAN   STANDARD DEVIATION');
+      lReport.Add('   X   %9.3f %14.3f', [Means[0], StdDevs[0]]);
+      lReport.Add('   Y   %9.3f %14.3f', [Means[1], StdDevs[1]]);
+      lReport.Add('');
+
+      DisplayReport(lReport);
+    end;
+
+    // sort on X
+    for i := 0 to NoGrps - 1 do
+    begin
+      for j := 0 to MaxGrpSize-2 do
+      begin
+        for k := j+1 to MaxGrpSize - 1 do
+        begin
+          if (XValues[j,i] > XValues[k,i]) then // swap
+          begin
+            temp := XValues[j,i];
+            XValues[j,i] := XValues[k,i];
+            XValues[k,i] := temp;
+            temp := YValues[j,i];
+            YValues[j,i] := YValues[k,i];
+            YValues[k,i] := temp;
+          end;
+        end;
+      end;
+    end;
+
+    BlankFrm.Image1.Canvas.Clear;
+    BlankFrm.Show;
+    PlotXY(XValues, YValues, MaxX, MinX, MaxY, MinY, MaxGrpSize, NoGrps, MinGrp);
+
+  finally
+    lReport.Free;
+    NoInGrp := nil;
+    StdDevs := nil;
+    Means := nil;
+    XValues := nil;
+    YValues := nil;
+  end;
+end;
+
+procedure TMultXvsYFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TMultXvsYFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if DictionaryFrm = nil then Application.CreateForm(TDictionaryFrm, DictionaryFrm);
+  if BlankFrm = nil then Application.CreateForm(TBlankFrm, BlankFrm);
+end;
+
+procedure TMultXvsYFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TMultXvsYFrm.GroupOutBtnClick(Sender: TObject);
+begin
+  if GroupEdit.Text <> '' then
+  begin
+    VarList.Items.Add(GroupEdit.Text);
+    GroupEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TMultXvsYFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).Tag);
+end;
+
+procedure TMultXvsYFrm.XInBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := VarList.ItemIndex;
+  if (i > -1) and (XEdit.Text = '') then
+  begin
+    XEdit.Text := VarList.Items[i];
+    VarList.Items.Delete(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TMultXvsYFrm.XOutBtnClick(Sender: TObject);
+begin
+  if XEdit.Text <> '' then
+  begin
+    VarList.Items.Add(XEdit.Text);
+    XEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TMultXvsYFrm.YInBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := VarList.ItemIndex;
+  if (i > -1) and (YEdit.Text = '') then
+  begin
+    YEdit.Text := VarList.Items[i];
+    VarList.Items.Delete(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TMultXvsYFrm.YOutBtnClick(Sender: TObject);
+begin
+  if YEdit.Text <> '' then
+  begin
+    VarList.Items.Add(YEdit.Text);
+    YEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+// routine to plot X versus multiple Y values
+procedure TMultXvsYFrm.plotxy(var XValues: DblDyneMat; YValues: DblDyneMat;
+  MaxX, MinX, MaxY, MinY: double;  N, NoY, MinGrp: integer);
+var
+  xpos, ypos, hleft, hright, vtop, vbottom, imagewide : integer;
+  vhi, hwide, offset, strhi, imagehi, i, j, Grp : integer;
+  valincr, Yvalue, Xvalue, value : double;
+  Title: string;
+begin
+  Title := LabelEdit.Text;
+  BlankFrm.Caption := Title;
+  BlankFrm.Show;
+
+  imagewide := BlankFrm.Image1.Width;
+  imagehi := BlankFrm.Image1.Height;
+  vtop := 40;
+  vbottom := ceil(imagehi) - 60;
+  vhi := vbottom - vtop;
+  hleft := 100;
+  hright := imagewide - 80;
+  hwide := hright - hleft;
+
+  // Draw chart border and background
+  BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+  BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+  BlankFrm.Image1.Canvas.Rectangle(0, 0, imagewide, imagehi);
+
+  // Draw title
+  if Title <> '' then
+  begin
+    xpos := (imagewide - BlankFrm.Image1.Canvas.TextWidth(Title)) div 2;
+    yPos := 2;
+    BlankFrm.Image1.Canvas.TextOut(xpos, ypos, Title);
+  end;
+
+  // draw horizontal axis
+  BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+  BlankFrm.Image1.Canvas.MoveTo(hleft, vbottom);
+  BlankFrm.Image1.Canvas.LineTo(hright, vbottom);
+  valincr := (MaxX - MinX) / 10.0;
+  for i := 1 to 11 do
+  begin
+    ypos := vbottom;
+    Xvalue := MinX + valincr * (i - 1);
+    xpos := hLeft + ceil(hwide * ((Xvalue - MinX) / (MaxX - MinX)));
+    BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+    ypos := ypos + 10;
+    BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+    Title := Format('%.2f', [Xvalue]);
+    offset := BlankFrm.Image1.Canvas.TextWidth(Title) div 2;
+    xpos := xpos - offset;
+    BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+    BlankFrm.Image1.Canvas.TextOut(xpos, ypos, Title);
+  end;
+  xpos := hleft + (hwide - BlankFrm.Image1.Canvas.TextWidth(XEdit.Text)) div 2;
+  ypos := vbottom + 30;
+  BlankFrm.Image1.Canvas.TextOut(xpos, ypos, XEdit.Text);
+
+  // Draw vertical axis
+  Title := 'Y VALUES';
+  xpos := hleft - BlankFrm.Image1.Canvas.TextWidth(Title) div 2;
+  ypos := 8;
+  BlankFrm.Image1.Canvas.TextOut(xpos, ypos, Title);
+  xpos := hleft;
+  ypos := vtop;
+  BlankFrm.Image1.Canvas.MoveTo(xpos, ypos);
+  ypos := vbottom;
+  BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+  valincr := (MaxY - MinY) / 10.0;
+  for i := 1 to 11 do
+  begin
+    value := MaxY - ((i-1) * valincr);
+    Title := Format('%.2f',[value]);
+    strhi := BlankFrm.Image1.Canvas.TextHeight(Title);
+    xpos := hleft - 20 - BlankFrm.Image1.Canvas.TextWidth(Title);
+    Yvalue := MaxY - (valincr * (i-1));
+    ypos := ceil(vhi * ( (MaxY - Yvalue) / (MaxY - MinY)));
+    ypos := ypos + vtop - strhi div 2;
+    BlankFrm.Image1.Canvas.TextOut(xpos, ypos, Title);
+    xpos := hleft;
+    ypos := ypos + strhi div 2;
+    BlankFrm.Image1.Canvas.MoveTo(xpos, ypos);
+    xpos := hleft - 10;
+    BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+  end;
+
+  // draw points for x and y pairs
+  for j := 0 to NoY - 1 do
+  begin
+    BlankFrm.Image1.Canvas.Brush.Style := bsSolid;
+    BlankFrm.Image1.Canvas.Brush.Color := DATA_COLORS[j mod Length(DATA_COLORS)];
+    BlankFrm.Image1.Canvas.Pen.Color := DATA_COLORS[j mod Length(DATA_COLORS)];
+    BlankFrm.Image1.Canvas.Font.Color := DATA_COLORS[j mod Length(DATA_COLORS)];
+    Grp := MinGrp + j;
+    Title := 'GROUP ' + IntToStr(Grp);
+    for i := 1 to N do
+    begin
+      ypos := vtop + ceil(vhi * ( (MaxY - YValues[i-1,j]) / (MaxY - MinY)));
+      xpos := hleft + ceil(hwide * ( (XValues[i-1,j] - MinX) / (MaxX - MinX)));
+      if (i = 1) then
+        BlankFrm.Image1.Canvas.MoveTo(xpos, ypos);
+      if LinesChk.Checked then
+        BlankFrm.Image1.Canvas.LineTo(xpos, ypos);
+      BlankFrm.Image1.Canvas.Ellipse(xpos, ypos, xpos+5, ypos+5);
+    end;
+    strhi := BlankFrm.Image1.Canvas.TextHeight(Title);
+    BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+    BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+    xpos := hwide + hleft;
+    BlankFrm.Image1.Canvas.MoveTo(xpos, ypos-strhi);
+    BlankFrm.Image1.Canvas.TextOut(xpos, ypos, Title);
+  end;
+
+  BlankFrm.Image1.Canvas.Font.Color := clBlack;
+end;
+
+procedure TMultXvsYFrm.UpdateBtnStates;
+var
+  lSelected: Boolean;
+  i: Integer;
+begin
+  lSelected := false;
+  for i:=0 to VarList.Items.Count-1 do
+    if VarList.Selected[i] then
+    begin
+      lSelected := true;
+      break;
+    end;
+
+  XInBtn.Enabled := lSelected and (XEdit.Text = '');
+  YInBtn.Enabled := lSelected and (YEdit.Text = '');
+  GroupInBtn.Enabled := lSelected and (GroupEdit.Text = '');
+  XOutBtn.Enabled := (XEdit.Text <> '');
+  YOutBtn.Enabled := (YEdit.Text <> '');
+  GroupOutBtn.Enabled := (GroupEdit.Text <> '');
+end;
+
+initialization
+  {$I multxvsyunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/normalityunit.lfm

@@ -0,0 +1,415 @@
+object NormalityFrm: TNormalityFrm
+  Left = 721
+  Height = 396
+  Top = 294
+  Width = 402
+  Caption = 'Normality Tests'
+  ClientHeight = 396
+  ClientWidth = 402
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 15
+    Top = 8
+    Width = 49
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Variables:'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = TestVarEdit
+    AnchorSideBottom.Control = VarInBtn
+    AnchorSideBottom.Side = asrBottom
+    Left = 261
+    Height = 15
+    Top = 36
+    Width = 93
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 2
+    Caption = 'Test Normality of:'
+    ParentColor = False
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = VarInBtn
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 313
+    Top = 25
+    Width = 209
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    ItemHeight = 0
+    OnSelectionChange = VarListSelectionChange
+    TabOrder = 0
+  end
+  object VarInBtn: TBitBtn
+    AnchorSideLeft.Control = GroupBox1
+    AnchorSideTop.Control = VarList
+    AnchorSideRight.Control = VarList
+    AnchorSideRight.Side = asrBottom
+    Left = 225
+    Height = 28
+    Top = 25
+    Width = 28
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = VarInBtnClick
+    Spacing = 0
+    TabOrder = 1
+  end
+  object VarOutBtn: TBitBtn
+    AnchorSideLeft.Control = GroupBox1
+    AnchorSideTop.Control = VarInBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 225
+    Height = 28
+    Top = 57
+    Width = 28
+    BorderSpacing.Top = 4
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = VarOutBtnClick
+    Spacing = 0
+    TabOrder = 2
+  end
+  object TestVarEdit: TEdit
+    AnchorSideLeft.Control = VarOutBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = Label2
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 261
+    Height = 23
+    Top = 53
+    Width = 133
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    TabOrder = 3
+    Text = 'TestVarEdit'
+  end
+  object GroupBox1: TGroupBox
+    AnchorSideTop.Control = VarOutBtn
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 225
+    Height = 80
+    Top = 97
+    Width = 169
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 12
+    BorderSpacing.Right = 8
+    Caption = 'Shapiro-Wilkes Rresults'
+    ClientHeight = 60
+    ClientWidth = 165
+    TabOrder = 4
+    object Label3: TLabel
+      AnchorSideLeft.Control = GroupBox1
+      AnchorSideTop.Control = WEdit
+      AnchorSideTop.Side = asrCenter
+      Left = 12
+      Height = 15
+      Top = 6
+      Width = 33
+      BorderSpacing.Left = 12
+      Caption = 'WWW'
+      ParentColor = False
+    end
+    object Label4: TLabel
+      AnchorSideLeft.Control = GroupBox1
+      AnchorSideTop.Control = ProbEdit
+      AnchorSideTop.Side = asrCenter
+      Left = 12
+      Height = 15
+      Top = 33
+      Width = 57
+      BorderSpacing.Left = 12
+      Caption = 'Probability'
+      ParentColor = False
+    end
+    object WEdit: TEdit
+      AnchorSideLeft.Control = ProbEdit
+      AnchorSideTop.Control = GroupBox1
+      AnchorSideRight.Control = GroupBox1
+      AnchorSideRight.Side = asrBottom
+      Left = 77
+      Height = 23
+      Top = 2
+      Width = 80
+      Alignment = taRightJustify
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      ReadOnly = True
+      TabOrder = 0
+      Text = 'WEdit'
+    end
+    object ProbEdit: TEdit
+      AnchorSideLeft.Control = Label4
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = WEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = GroupBox1
+      AnchorSideRight.Side = asrBottom
+      Left = 77
+      Height = 23
+      Top = 29
+      Width = 80
+      Alignment = taRightJustify
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 4
+      BorderSpacing.Right = 8
+      BorderSpacing.Bottom = 8
+      ReadOnly = True
+      TabOrder = 1
+      Text = 'ProbEdit'
+    end
+  end
+  object GroupBox2: TGroupBox
+    AnchorSideLeft.Control = GroupBox1
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 225
+    Height = 155
+    Top = 191
+    Width = 169
+    Anchors = [akTop, akLeft, akRight]
+    AutoSize = True
+    BorderSpacing.Right = 8
+    Caption = 'Lilliefors Test Results'
+    ClientHeight = 135
+    ClientWidth = 165
+    TabOrder = 5
+    object Label5: TLabel
+      AnchorSideLeft.Control = GroupBox2
+      AnchorSideTop.Control = SkewEdit
+      AnchorSideTop.Side = asrCenter
+      Left = 12
+      Height = 15
+      Top = 6
+      Width = 53
+      BorderSpacing.Left = 12
+      Caption = 'Skewness:'
+      ParentColor = False
+    end
+    object Label6: TLabel
+      AnchorSideLeft.Control = GroupBox2
+      AnchorSideTop.Control = KurtosisEdit
+      AnchorSideTop.Side = asrCenter
+      Left = 12
+      Height = 15
+      Top = 33
+      Width = 45
+      BorderSpacing.Left = 12
+      Caption = 'Kurtosis:'
+      ParentColor = False
+    end
+    object Label7: TLabel
+      AnchorSideLeft.Control = GroupBox2
+      AnchorSideTop.Control = StatEdit
+      AnchorSideTop.Side = asrCenter
+      Left = 12
+      Height = 15
+      Top = 60
+      Width = 67
+      BorderSpacing.Left = 12
+      Caption = 'Test Statistic:'
+      ParentColor = False
+    end
+    object SkewEdit: TEdit
+      AnchorSideLeft.Control = StatEdit
+      AnchorSideTop.Control = GroupBox2
+      AnchorSideRight.Control = GroupBox2
+      AnchorSideRight.Side = asrBottom
+      Left = 87
+      Height = 23
+      Top = 2
+      Width = 70
+      Alignment = taRightJustify
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      ReadOnly = True
+      TabOrder = 0
+      Text = 'SkewEdit'
+    end
+    object KurtosisEdit: TEdit
+      AnchorSideLeft.Control = StatEdit
+      AnchorSideTop.Control = SkewEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = GroupBox2
+      AnchorSideRight.Side = asrBottom
+      Left = 87
+      Height = 23
+      Top = 29
+      Width = 70
+      Alignment = taRightJustify
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Top = 4
+      BorderSpacing.Right = 8
+      ReadOnly = True
+      TabOrder = 1
+      Text = 'KurtosisEdit'
+    end
+    object StatEdit: TEdit
+      AnchorSideLeft.Control = Label7
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = KurtosisEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = GroupBox2
+      AnchorSideRight.Side = asrBottom
+      Left = 87
+      Height = 23
+      Top = 56
+      Width = 70
+      Alignment = taRightJustify
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 4
+      BorderSpacing.Right = 8
+      BorderSpacing.Bottom = 8
+      ReadOnly = True
+      TabOrder = 2
+      Text = 'StatEdit'
+    end
+    object Label8: TLabel
+      AnchorSideLeft.Control = Label5
+      AnchorSideTop.Control = StatEdit
+      AnchorSideTop.Side = asrBottom
+      Left = 12
+      Height = 15
+      Top = 87
+      Width = 104
+      Caption = 'Lillifors Conclusion:'
+      ParentColor = False
+      WordWrap = True
+    end
+    object ConclusionEdit: TEdit
+      AnchorSideLeft.Control = Label8
+      AnchorSideTop.Control = Label8
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = GroupBox2
+      AnchorSideRight.Side = asrBottom
+      Left = 12
+      Height = 23
+      Top = 104
+      Width = 145
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      BorderSpacing.Bottom = 8
+      ReadOnly = True
+      TabOrder = 3
+      Text = 'ConclusionEdit'
+    end
+  end
+  object Panel1: TPanel
+    AnchorSideRight.Side = asrBottom
+    Left = 8
+    Height = 26
+    Top = 362
+    Width = 386
+    Align = alBottom
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    BevelOuter = bvNone
+    ClientHeight = 26
+    ClientWidth = 386
+    TabOrder = 6
+    object CloseBtn: TButton
+      AnchorSideTop.Control = Panel1
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 319
+      Height = 25
+      Top = 1
+      Width = 55
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Right = 12
+      Caption = 'Close'
+      ModalResult = 11
+      TabOrder = 3
+    end
+    object ApplyBtn: TButton
+      AnchorSideTop.Control = Panel1
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = CloseBtn
+      Left = 254
+      Height = 25
+      Top = 1
+      Width = 57
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Right = 8
+      Caption = 'Apply'
+      OnClick = ApplyBtnClick
+      TabOrder = 2
+    end
+    object PrintBtn: TButton
+      AnchorSideTop.Control = Panel1
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = ApplyBtn
+      Left = 195
+      Height = 25
+      Top = 1
+      Width = 51
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Right = 8
+      Caption = 'Print'
+      OnClick = PrintBtnClick
+      TabOrder = 1
+    end
+    object ResetBtn: TButton
+      AnchorSideTop.Control = Panel1
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = PrintBtn
+      Left = 133
+      Height = 25
+      Top = 1
+      Width = 54
+      Anchors = [akTop, akRight]
+      AutoSize = True
+      BorderSpacing.Left = 12
+      BorderSpacing.Right = 8
+      Caption = 'Reset'
+      OnClick = ResetBtnClick
+      TabOrder = 0
+    end
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Panel1
+    Left = 0
+    Height = 8
+    Top = 346
+    Width = 402
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/normalityunit.pas

@@ -0,0 +1,385 @@
+// Use file "cansas.laz" for testing
+
+unit NormalityUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Buttons, ExtCtrls,
+  MainUnit, Globals, FunctionsLib, DataProcs, OutputUnit;
+
+
+type
+
+  { TNormalityFrm }
+
+  TNormalityFrm = class(TForm)
+    Bevel1: TBevel;
+    ResetBtn: TButton;
+    PrintBtn: TButton;
+    ApplyBtn: TButton;
+    CloseBtn: TButton;
+    ConclusionEdit: TEdit;
+    Label8: TLabel;
+    Panel1: TPanel;
+    StatEdit: TEdit;
+    KurtosisEdit: TEdit;
+    SkewEdit: TEdit;
+    GroupBox2: TGroupBox;
+    Label5: TLabel;
+    Label6: TLabel;
+    Label7: TLabel;
+    ProbEdit: TEdit;
+    Label4: TLabel;
+    WEdit: TEdit;
+    GroupBox1: TGroupBox;
+    Label3: TLabel;
+    TestVarEdit: TEdit;
+    Label2: TLabel;
+    VarInBtn: TBitBtn;
+    VarOutBtn: TBitBtn;
+    Label1: TLabel;
+    VarList: TListBox;
+    procedure ApplyBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure PrintBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarInBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+    procedure VarOutBtnClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: boolean;
+    function Norm(z : double) : double;
+    procedure UpdateBtnStates;
+
+  public
+    { public declarations }
+  end; 
+
+var
+  NormalityFrm: TNormalityFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TNormalityFrm }
+
+procedure TNormalityFrm.PrintBtnClick(Sender: TObject);
+var
+  lReport: TStrings;
+begin
+  lReport := TStringList.Create;
+  try
+    lReport.Add('NORMALITY TESTS FOR '+ TestVarEdit.Text);
+    lReport.Add('');
+    lReport.Add('Shapiro-Wilkes W = ' + WEdit.Text);
+    lReport.Add('Shapiro-Wilkes Prob. = ' + ProbEdit.Text);
+    lReport.Add('');
+    lReport.Add('Skew = ' + SkewEdit.Text);
+    lReport.Add('Kurtosis = ' + KurtosisEdit.Text);
+    lReport.Add('Lilliefors Test Statistic = ' + StatEdit.Text);
+    lReport.Add('Conclusion: ' + ConclusionEdit.Text);
+
+    DisplayReport(lReport);
+  finally
+    lReport.Free;
+  end;
+end;
+
+procedure TNormalityFrm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  TestVarEdit.Text := '';
+  WEdit.Text := '';
+  ProbEdit.Text := '';
+  ConclusionEdit.Text := '';
+  SkewEdit.Text := '';
+  KurtosisEdit.Text := '';
+  StatEdit.Text := '';
+  VarList.Items.Clear;
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  UpdateBtnStates;
+end;
+
+procedure TNormalityFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([ResetBtn.Width, PrintBtn.Width, ApplyBtn.Width, CloseBtn.Width]);
+  ResetBtn.Constraints.MinWidth := w;
+  PrintBtn.Constraints.MinWidth := w;
+  ApplyBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  FAutoSized := True;
+end;
+
+procedure TNormalityFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+end;
+
+procedure TNormalityFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(nil);
+end;
+
+procedure TNormalityFrm.ApplyBtnClick(Sender: TObject);
+var
+  w: Double = 0.0;
+  temp, pw : double;
+  skew, kurtosis : double;
+  mean, variance, stddev, deviation, devsqr, M2, M3, M4 : double;
+  i, j, n, n1, n2, ier : integer;
+  varlabel : string;
+  selcol : integer;
+  data, a, z, x : DblDyneVec;
+  freq : IntDyneVec;
+  fval, jval, DP : DblDyneVec;
+  F1, DPP, D, D1, A0, C1, D15, D10, D05, D025, t2 : double;
+  init : boolean;
+  msg : string;
+
+  procedure Cleanup;
+  begin
+    DP := nil;
+    jval := nil;
+    fval := nil;
+    data := nil;
+    a := nil;
+    freq := nil;
+    z := nil;
+    x := nil;
+  end;
+
+begin
+  selcol := 0;
+  for i := 1 to NoVariables do
+    if OS3MainFrm.DataGrid.Cells[i,0] = TestVarEdit.Text then
+    begin
+      selcol := i;
+      break;
+    end;
+  if selCol = 0 then
+  begin
+    MessageDlg('No variable selected.', mtError, [mbOK], 0);
+    exit;
+  end;
+
+  init := false;
+  n := 0;
+  varlabel := TestVarEdit.Text;
+
+  // place values into the data array
+  SetLength(data, NoCases+1); // arrays start at 1
+  SetLength(a, NoCases+1);
+  SetLength(freq, NoCases+1);
+  SetLength(z, NoCases+1);
+  SetLength(x, NoCases+1);
+  SetLength(fval, NoCases+1);
+  SetLength(jval, NoCases+1);
+  SetLength(DP, NoCases+1);
+  for i := 1 to NoCases do
+  begin
+    if not ValidValue(i,selcol) then
+      continue;
+    n := n + 1;
+    data[n] := StrToFloat(OS3MainFrm.DataGrid.Cells[selcol,i]);
+  end;
+  n1 := n;
+  n2 := n div 2;
+
+  // sort into ascending order
+  for i := 1 to n - 1 do
+  begin
+    for j := i + 1 to n do
+    begin
+      if data[i] > data[j] then
+      begin
+        temp := data[i];
+        data[i] := data[j];
+        data[j] := temp;
+      end;
+    end;
+  end;
+
+  // call Shapiro-Wilks function
+  swilk(init, data, n, n1, n2, a, w, pw, ier);
+  if ier <> 0 then
+  begin
+    msg := 'Error encountered = ' + IntToStr(ier);
+    MessageDlg(msg, mtError, [mbOK], 0);
+    Cleanup;
+    exit;
+  end;
+  WEdit.Text := Format('%8.4f', [w]);
+  ProbEdit.Text := Format('%8.4f', [pw]);
+
+  // Now do Lilliefors
+  // Get unique scores and their frequencies
+  n1 := 1;
+  i := 1;
+  freq[1] := 1;
+  x[1] := data[1];
+  repeat
+//again:
+    for j := i + 1 to n do
+    begin
+      if data[j] = x[n1] then freq[n1] := freq[n1] + 1;
+    end;
+    i := i + freq[n1];
+    if i <= n then
+    begin
+      n1 := n1 + 1;
+      x[n1] := data[i];
+      freq[n1] := 1;
+      //goto again;
+    end;
+  until i > n;
+
+  // now get skew and kurtosis of scores
+  mean := 0.0;
+  variance := 0.0;
+  for i := 1 to n do
+  begin
+    mean := mean + data[i];
+    variance := variance + (data[i] * data[i]);
+  end;
+  variance := variance - (mean * mean) / n;
+  variance := variance / (n - 1);
+  stddev := sqrt(variance);
+  mean := mean / n;
+
+  // obtain skew, kurtosis and z scores
+  M2 := 0.0;
+  M3 := 0.0;
+  M4 := 0.0;
+  for i := 1 to n do
+  begin
+    deviation := data[i] - mean;
+    devsqr := deviation * deviation;
+    M2 := M2 + devsqr;
+    M3 := M3 + (deviation * devsqr);
+    M4 := M4 + (devsqr * devsqr);
+    z[i] := (data[i] - mean) / stddev;
+  end;
+  for i := 1 to n1 do x[i] := (x[i] - mean) / stddev;
+    skew := (n * M3) / ((n - 1) * (n - 2) * stddev * variance);
+  kurtosis := (n * (n + 1) * M4) - (3 * M2 * M2 * (n - 1));
+  kurtosis := kurtosis /( (n - 1) * (n - 2) * (n - 3) * (variance * variance) );
+  SkewEdit.Text := Format('%8.3f', [skew]);
+  KurtosisEdit.Text := Format('%8.3f', [kurtosis]);
+
+  // obtain the test statistic
+  for i := 1 to n1 do
+  begin
+    F1 := Norm(x[i]);
+    if x[i] >= 0 then
+      fval[i] := 1.0 - (F1 / 2.0)
+    else
+      fval[i] := F1 / 2.0;
+  end;
+
+  // cumulative proportions
+  jval[1] := freq[1] / n;
+  for i := 2 to n1 do jval[i] := jval[i-1] + freq[i] / n;
+  for i := 1 to n1 do DP[i] := abs(jval[i] - fval[i]);
+
+  // sort DP
+  for i := 1 to n1-1 do
+  begin
+    for j := i+1 to n1 do
+    begin
+      if DP[j] < DP[i] then
+      begin
+        temp := DP[i];
+        DP[i] := DP[j];
+        DP[j] := temp;
+      end;
+    end;
+  end;
+  DPP := DP[n1];
+  D := DPP;
+  D1 := D;
+  StatEdit.Text := Format('%8.3f', [D]);
+  A0 := sqrt(n);
+  C1 := A0 - 0.01 + (0.85 / A0);
+  D15 := 0.775 / C1;
+  D10 := 0.819 / C1;
+  D05 := 0.895 / C1;
+  D025 := 0.995 / C1;
+  t2 := D;
+  if t2 > D025 then ConclusionEdit.Text := 'Strong evidence against normality.';
+  if ((t2 <= D025) and (t2 > D05)) then ConclusionEdit.Text := 'Sufficient evidence against normality.';
+  if ((t2 <= D05) and (t2 > D10)) then ConclusionEdit.Text := 'Suggestive evidence against normality.';
+  if ((t2 <= D10) and (t2 > D15)) then ConclusionEdit.Text := 'Little evidence against normality.';
+  if (t2 <= D15) then ConclusionEdit.Text := 'No evidence against normality.';
+
+  Cleanup;
+end;
+
+procedure TNormalityFrm.VarInBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := VarList.ItemIndex;
+  if (i > -1) and (TestVarEdit.Text = '') then
+  begin
+    TestVarEdit.Text := VarList.Items.Strings[i];
+    VarList.Items.Delete(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TNormalityFrm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+procedure TNormalityFrm.VarOutBtnClick(Sender: TObject);
+begin
+  if TestVarEdit.Text <> '' then
+  begin
+    VarList.Items.Add(TestVarEdit.Text);
+    TestVarEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+function TNormalityFrm.Norm(z : double) : double;
+var
+   p : double;
+begin
+     z := abs(z);
+     p := 1.0 + z * (0.04986735 + z * (0.02114101 + z * (0.00327763 +
+          z * (0.0000380036 + z * (0.0000488906 + z * 0.000005383)))));
+     p := p * p;
+     p := p * p;
+     p := p * p;
+     Result := 1.0 / (p * p);
+end;
+
+procedure TNormalityFrm.UpdateBtnStates;
+begin
+  VarInBtn.Enabled := (VarList.ItemIndex > -1) and (TestVarEdit.Text = '');
+  VarOutBtn.Enabled := (TestVarEdit.Text <> '');
+end;
+
+initialization
+  {$I normalityunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/plotxyunit.lfm

@@ -0,0 +1,337 @@
+object PlotXYFrm: TPlotXYFrm
+  Left = 433
+  Height = 367
+  Top = 262
+  Width = 490
+  AutoSize = True
+  Caption = 'Plot X versus Y'
+  ClientHeight = 367
+  ClientWidth = 490
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    Left = 8
+    Height = 15
+    Top = 8
+    Width = 46
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    Caption = 'Variables'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = XEdit
+    AnchorSideTop.Side = asrBottom
+    AnchorSideBottom.Control = XEdit
+    Left = 267
+    Height = 15
+    Top = 31
+    Width = 76
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 2
+    Caption = 'X Axis Variable'
+    ParentColor = False
+  end
+  object Label3: TLabel
+    AnchorSideLeft.Control = YEdit
+    AnchorSideBottom.Control = YEdit
+    Left = 267
+    Height = 15
+    Top = 117
+    Width = 76
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 2
+    Caption = 'Y Axis Variable'
+    ParentColor = False
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = XinBtn
+    AnchorSideBottom.Control = Bevel1
+    AnchorSideBottom.Side = asrBottom
+    Left = 8
+    Height = 293
+    Top = 25
+    Width = 215
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Bottom = 8
+    ItemHeight = 0
+    OnSelectionChange = VarListSelectionChange
+    TabOrder = 0
+  end
+  object XinBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = VarList
+    AnchorSideRight.Control = XEdit
+    Left = 231
+    Height = 28
+    Top = 25
+    Width = 28
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = XinBtnClick
+    Spacing = 0
+    TabOrder = 1
+  end
+  object XOutBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = XinBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 231
+    Height = 28
+    Top = 57
+    Width = 28
+    BorderSpacing.Top = 4
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = XOutBtnClick
+    Spacing = 0
+    TabOrder = 2
+  end
+  object YInBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = XOutBtn
+    AnchorSideTop.Side = asrBottom
+    AnchorSideBottom.Control = YOutBtn
+    Left = 231
+    Height = 28
+    Top = 109
+    Width = 28
+    BorderSpacing.Top = 24
+    BorderSpacing.Bottom = 4
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = YInBtnClick
+    Spacing = 0
+    TabOrder = 3
+  end
+  object YOutBtn: TBitBtn
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = YInBtn
+    AnchorSideTop.Side = asrBottom
+    AnchorSideBottom.Control = VarList
+    AnchorSideBottom.Side = asrBottom
+    Left = 231
+    Height = 28
+    Top = 141
+    Width = 28
+    BorderSpacing.Top = 4
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = YOutBtnClick
+    Spacing = 0
+    TabOrder = 4
+  end
+  object XEdit: TEdit
+    AnchorSideLeft.Control = XinBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = XOutBtn
+    AnchorSideBottom.Side = asrBottom
+    Left = 267
+    Height = 23
+    Top = 50
+    Width = 215
+    Anchors = [akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 4
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 12
+    ReadOnly = True
+    TabOrder = 5
+    Text = 'XEdit'
+  end
+  object YEdit: TEdit
+    AnchorSideLeft.Control = XEdit
+    AnchorSideRight.Control = XEdit
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = YOutBtn
+    AnchorSideBottom.Side = asrBottom
+    Left = 267
+    Height = 23
+    Top = 134
+    Width = 215
+    Anchors = [akLeft, akRight, akBottom]
+    BorderSpacing.Bottom = 12
+    ReadOnly = True
+    TabOrder = 6
+    Text = 'YEdit'
+  end
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = YEdit
+    AnchorSideTop.Control = YEdit
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Side = asrBottom
+    Left = 267
+    Height = 141
+    Top = 181
+    Width = 191
+    AutoSize = True
+    BorderSpacing.Top = 24
+    BorderSpacing.Right = 8
+    Caption = 'Options'
+    ChildSizing.LeftRightSpacing = 12
+    ClientHeight = 121
+    ClientWidth = 187
+    TabOrder = 7
+    object Label4: TLabel
+      AnchorSideLeft.Control = ConfChk
+      AnchorSideTop.Control = ConfEdit
+      AnchorSideTop.Side = asrCenter
+      Left = 36
+      Height = 15
+      Top = 94
+      Width = 74
+      BorderSpacing.Left = 24
+      BorderSpacing.Right = 8
+      Caption = '% Confidence'
+      ParentColor = False
+    end
+    object DescChk: TCheckBox
+      AnchorSideLeft.Control = GroupBox1
+      AnchorSideTop.Control = GroupBox1
+      Left = 12
+      Height = 19
+      Top = 2
+      Width = 155
+      BorderSpacing.Left = 12
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      Caption = 'Print Descriptive Statistics'
+      TabOrder = 0
+    end
+    object ConfEdit: TEdit
+      AnchorSideLeft.Control = Label4
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = ConfChk
+      AnchorSideTop.Side = asrBottom
+      Left = 118
+      Height = 23
+      Top = 90
+      Width = 57
+      Alignment = taRightJustify
+      BorderSpacing.Left = 8
+      BorderSpacing.Right = 8
+      BorderSpacing.Bottom = 8
+      TabOrder = 1
+      Text = '95.0'
+    end
+    object LineChk: TCheckBox
+      AnchorSideLeft.Control = DescChk
+      AnchorSideTop.Control = DescChk
+      AnchorSideTop.Side = asrBottom
+      Left = 12
+      Height = 19
+      Top = 25
+      Width = 146
+      BorderSpacing.Top = 4
+      Caption = 'Plot the Regression Line'
+      TabOrder = 2
+    end
+    object MeansChk: TCheckBox
+      AnchorSideLeft.Control = LineChk
+      AnchorSideTop.Control = LineChk
+      AnchorSideTop.Side = asrBottom
+      Left = 12
+      Height = 19
+      Top = 48
+      Width = 99
+      BorderSpacing.Top = 4
+      Caption = 'Plot the Means'
+      TabOrder = 3
+    end
+    object ConfChk: TCheckBox
+      AnchorSideLeft.Control = MeansChk
+      AnchorSideTop.Control = MeansChk
+      AnchorSideTop.Side = asrBottom
+      Left = 12
+      Height = 19
+      Top = 71
+      Width = 155
+      BorderSpacing.Top = 4
+      BorderSpacing.Right = 8
+      Caption = 'Plot the Confidence Band'
+      TabOrder = 4
+    end
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 416
+    Height = 25
+    Top = 334
+    Width = 62
+    Anchors = [akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 8
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 332
+    Height = 25
+    Top = 334
+    Width = 76
+    Anchors = [akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 9
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 270
+    Height = 25
+    Top = 334
+    Width = 54
+    Anchors = [akRight, akBottom]
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 10
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 318
+    Width = 490
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/plotxyunit.pas

@@ -0,0 +1,774 @@
+// Use file "cansas.laz" for testing
+
+unit PlotXYUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls, Buttons,
+  MainUnit, Globals, OutputUnit, FunctionsLib, DataProcs, BlankFrmUnit;
+
+type
+
+  { TPlotXYFrm }
+
+  TPlotXYFrm = class(TForm)
+    Bevel1: TBevel;
+    ConfEdit: TEdit;
+    Label4: TLabel;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    CloseBtn: TButton;
+    DescChk: TCheckBox;
+    LineChk: TCheckBox;
+    MeansChk: TCheckBox;
+    ConfChk: TCheckBox;
+    GroupBox1: TGroupBox;
+    YEdit: TEdit;
+    Label3: TLabel;
+    XEdit: TEdit;
+    Label2: TLabel;
+    XinBtn: TBitBtn;
+    XOutBtn: TBitBtn;
+    YInBtn: TBitBtn;
+    YOutBtn: TBitBtn;
+    Label1: TLabel;
+    VarList: TListBox;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+    procedure XinBtnClick(Sender: TObject);
+    procedure XOutBtnClick(Sender: TObject);
+    procedure YInBtnClick(Sender: TObject);
+    procedure YOutBtnClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    procedure plotxy(VAR Xpoints : DblDyneVec;
+                     VAR Ypoints : DblDyneVec;
+                     VAR UpConf : DblDyneVec;
+                     VAR LowConf : DblDyneVec;
+                     ConfBand : double;
+                     Xmean, Ymean , R : double;
+                     Slope, Intercept : double;
+                     Xmax, Xmin, Ymax, Ymin : double;
+                     N : integer);
+
+    {
+    procedure pplotxy(VAR Xpoints : DblDyneVec;
+                      VAR Ypoints : DblDyneVec;
+                      VAR UpConf : DblDyneVec;
+                      VAR LowConf : DblDyneVec;
+                      ConfBand : double;
+                      Xmean, Ymean , R : double;
+                      Slope, Intercept : double;
+                      Xmax, Xmin, Ymax, Ymin : double;
+                      N : integer);
+    }
+    procedure UpdateBtnStates;
+
+    function Validate(out AMsg: String; out AControl: TWinControl;
+      Xcol,Ycol: Integer): Boolean;
+  public
+    { public declarations }
+  end; 
+
+var
+  PlotXYFrm: TPlotXYFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TPlotXYFrm }
+
+procedure TPlotXYFrm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  XEdit.Text := '';
+  YEdit.Text := '';
+  ConfEdit.Text := FormatFloat('0.0', DEFAULT_CONFIDENCE_LEVEL_PERCENT);
+  DescChk.Checked := false;
+  LineChk.Checked := false;
+  MeansChk.Checked := false;
+  ConfChk.Checked := false;
+  //PrintChk.Checked := false;
+  VarList.Items.Clear;
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  UpdateBtnStates;
+end;
+
+procedure TPlotXYFrm.XinBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if index > -1 then
+  begin
+    XEdit.Text := VarList.Items[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TPlotXYFrm.XOutBtnClick(Sender: TObject);
+begin
+  VarList.Items.Add(XEdit.Text);
+  XEdit.Text := '';
+  UpdateBtnStates;
+end;
+
+procedure TPlotXYFrm.YInBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if index > -1 then
+  begin
+    YEdit.Text := VarList.Items[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TPlotXYFrm.YOutBtnClick(Sender: TObject);
+begin
+  VarList.Items.Add(YEdit.Text);
+  YEdit.Text := '';
+  UpdateBtnStates;
+end;
+
+procedure TPlotXYFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TPlotXYFrm.ComputeBtnClick(Sender: TObject);
+var
+   Xmin, Xmax, Ymin, Ymax, SSx, t, DF : double;
+   Xmean, Ymean, Xvariance, Yvariance, Xstddev, Ystddev, ConfBand : double;
+   X, Y, R, temp, SEPred, Slope, Intercept, predicted, sedata : double;
+   i, j : integer;
+   Xcol, Ycol, N, NoSelected : integer;
+   Xpoints : DblDyneVec;
+   Ypoints : DblDyneVec;
+   UpConf  : DblDyneVec;
+   lowConf : DblDyneVec;
+   cellstring : string;
+   ColNoSelected : IntDyneVec;
+   C: TWinControl;
+   msg: String;
+   lReport: TStrings;
+begin
+     SetLength(Xpoints,NoCases + 1);
+     SetLength(Ypoints,NoCases + 1);
+     SetLength(UpConf,NoCases + 1);
+     SetLength(lowConf,NoCases + 1);
+     SetLength(ColNoSelected,NoVariables);
+
+     Xcol := 0;
+     Ycol := 0;
+
+     for i := 1 to Novariables do
+     begin
+          cellstring := OS3MainFrm.DataGrid.Cells[i,0];
+          if cellstring = XEdit.Text then Xcol := i;
+          if cellstring = YEdit.Text then Ycol := i;
+     end;
+
+     // Validation
+     if not Validate(msg, C, Xcol, Ycol) then
+     begin
+       C.SetFocus;
+       MessageDlg(msg, mtError, [mbOK], 0);
+       ModalResult := mrNone;
+       exit;
+     end;
+
+     NoSelected := 2;
+     ColNoSelected[0] := Xcol;
+     ColNoSelected[1] := Ycol;
+     N := 0;
+     Xmax := -1.0e20;
+     Xmin := 1.0e20;
+     Ymax := -1.0e20;
+     Ymin := 1.0e20;
+     Xmean := 0.0;
+     Ymean := 0.0;
+     Xvariance := 0.0;
+     Yvariance := 0.0;
+     R := 0.0;
+
+     for i := 1 to NoCases do
+     begin
+          if Not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+          N := N + 1;
+          X := StrToFloat(OS3MainFrm.DataGrid.Cells[Xcol,i]);
+          Y := StrToFloat(OS3MainFrm.DataGrid.Cells[Ycol,i]);
+          Xpoints[N] := X;
+          Ypoints[N] := Y;
+          if X > Xmax then Xmax := X;
+          if X < Xmin then Xmin := X;
+          if Y > Ymax then Ymax := Y;
+          if Y < Ymin then Ymin := Y;
+          Xmean := Xmean + X;
+          Ymean := Ymean + Y;
+          Xvariance := Xvariance + (X * X);
+          Yvariance := Yvariance + (Y * Y);
+          R := R + (X * Y);
+     end;
+
+     // sort on X
+     for i := 1 to N - 1 do
+     begin
+          for j := i + 1 to N do
+          begin
+               if Xpoints[i] > Xpoints[j] then //swap
+               begin
+                    temp := Xpoints[i];
+                    Xpoints[i] := Xpoints[j];
+                    Xpoints[j] := temp;
+                    temp := Ypoints[i];
+                    Ypoints[i] := Ypoints[j];
+                    Ypoints[j] := temp;
+               end;
+          end;
+     end;
+
+     // calculate statistics
+     Xvariance := Xvariance - (Xmean * Xmean / N);
+     SSx := Xvariance;
+     Xvariance := Xvariance / (N - 1);
+     Xstddev := sqrt(Xvariance);
+
+     Yvariance := Yvariance - (Ymean * Ymean / N);
+     Yvariance := Yvariance / (N - 1);
+     Ystddev := sqrt(Yvariance);
+
+     R := R - (Xmean * Ymean / N);
+     R := R / (N - 1);
+     R := R / (Xstddev * Ystddev);
+     SEPred := sqrt(1.0 - (R * R)) * Ystddev;
+     SEPred := SEPred * sqrt((N - 1) / (N - 2));
+     Xmean := Xmean / N;
+     Ymean := Ymean / N;
+     Slope := R * Ystddev / Xstddev;
+     Intercept := Ymean - Slope * Xmean;
+
+     // Now, print the descriptive statistics to the output form if requested
+     if DescChk.Checked then
+     begin
+       lReport := TStringList.Create;
+       try
+         lReport.Add('X vs. Y PLOT');
+         lReport.Add('');
+         lReport.Add('X = %s, Y = %s from file: %s',[Xedit.Text, YEdit.Text,OS3MainFrm.FileNameEdit.Text]);
+         lReport.Add('');
+         lReport.Add('Variable     Mean   Variance  Std.Dev.');
+         lReport.Add('%-10s%8.2f  %8.2f  %8.2f', [XEdit.Text,Xmean,Xvariance,Xstddev]);
+         lReport.Add('%-10s%8.2f  %8.2f  %8.2f', [YEdit.Text,Ymean,Yvariance,Ystddev]);
+         lReport.Add('');
+         lReport.Add('Correlation:                %8.3f', [R]);
+         lReport.Add('Slope:                      %8.3f', [Slope]);
+         lReport.Add('Intercept:                  %8.3f', [Intercept]);
+         lReport.Add('Standard Error of Estimate: %8.3f', [SEPred]);
+         lReport.Add('Number of good cases:       %8d', [N]);
+
+         DisplayReport(lReport);
+       finally
+         lReport.Free;
+       end;
+     end;
+
+     // get upper and lower confidence points for each X value
+     if ConfChk.Checked then
+     begin
+          ConfBand := StrToFloat(ConfEdit.Text) / 100.0;
+          DF := N - 2;
+          t := inverset(ConfBand,DF);
+          for i := 1 to N do
+          begin
+               X := Xpoints[i];
+               predicted := slope * X + intercept;
+               sedata := SEPred * sqrt(1.0 + (1.0 / N) + (sqr(X - Xmean) / SSx));
+               UpConf[i] := predicted + (t * sedata);
+               lowConf[i] := predicted - (t * sedata);
+               if UpConf[i] > Ymax then Ymax := UpConf[i];
+               if lowConf[i] < Ymin then Ymin := lowConf[i];
+          end;
+     end
+     else ConfBand := 0.0;
+
+     // plot the values (and optional line and confidence band if elected)
+     plotxy(Xpoints, Ypoints, UpConf, LowConf, ConfBand, Xmean, Ymean, R,
+            Slope, Intercept, Xmax, Xmin, Ymax, Ymin, N);
+     Application.ProcessMessages;
+
+     {
+     // print the same if elected
+     if PrintChk.Checked then
+        pplotxy(Xpoints, Ypoints, UpConf, LowConf, ConfBand, Xmean, Ymean,
+                R, Slope, Intercept, Xmax, Xmin, Ymax, Ymin, N);
+     }
+
+     // cleanup
+     ColNoSelected := nil;
+     lowConf := nil;
+     UpConf := nil;
+     Ypoints := nil;
+     Xpoints := nil;
+end;
+
+procedure TPlotXYFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  VarList.Constraints.MinHeight := GroupBox1.Top + GroupBox1.Height - VarList.Top;
+  VarList.Constraints.MinWidth := GroupBox1.Width;
+
+  Constraints.MinWidth := GroupBox1.Width * 2 + XInBtn.Width + 4 * VarList.BorderSpacing.Left;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := True;
+end;
+
+procedure TPlotXYFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if BlankFrm = nil then Application.CreateForm(TBlankFrm, BlankFrm);
+end;
+
+procedure TPlotXYFrm.plotxy(VAR Xpoints : DblDyneVec;
+                            VAR Ypoints : DblDyneVec;
+                            VAR UpConf : DblDyneVec;
+                            VAR LowConf : DblDyneVec;
+                            ConfBand : double;
+                            Xmean, Ymean , R : double;
+                            Slope, Intercept : double;
+                            Xmax, Xmin, Ymax, Ymin : double;
+                            N : integer);
+var
+   i, xpos, ypos, hleft, hright, vtop, vbottom, imagewide : integer;
+   vhi, hwide, offset, strhi, imagehi : integer;
+   valincr, Yvalue, Xvalue : double;
+   Title : string;
+
+begin
+     BlankFrm.Image1.Canvas.Clear;
+     BlankFrm.Show;
+     Title := 'X versus Y PLOT Using File: ' + OS3MainFrm.FileNameEdit.Text;
+     BlankFrm.Caption := Title;
+     imagewide := BlankFrm.Image1.Width;
+     imagehi := BlankFrm.Image1.Height;
+     vtop := 20;
+     vbottom := round(imagehi) - 80;
+     vhi := vbottom - vtop;
+     hleft := 100;
+     hright := imagewide - 80;
+     hwide := hright - hleft;
+     BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+     BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+
+     // Draw chart border
+     BlankFrm.Image1.Canvas.Rectangle(0,0,imagewide,imagehi);
+
+     // draw Means
+     if MeansChk.Checked then
+     begin
+          ypos := round(vhi * ( (Ymax - Ymean) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := hleft;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          xpos := hright;
+          BlankFrm.Image1.Canvas.Pen.Color := clGreen;
+          BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+          Title := 'MEAN ';
+          Title := Title + YEdit.Text;
+          strhi := BlankFrm.Image1.Canvas.TextHeight(Title);
+          ypos := ypos - strhi div 2;
+          BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+          BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+
+          xpos := round(hwide * ( (Xmean - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          ypos := vtop;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          ypos := vbottom;
+          BlankFrm.Image1.Canvas.Pen.Color := clGreen;
+          BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+          Title := 'MEAN ';
+          Title := Title + XEdit.Text;
+          strhi := BlankFrm.Image1.Canvas.TextWidth(Title);
+          xpos := xpos - strhi div 2;
+          ypos := vtop - BlankFrm.Image1.Canvas.TextHeight(Title);
+          BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+          BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+     end;
+
+     // draw slope line
+     if LineChk.Checked then
+     begin
+          BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+          Yvalue := (Xpoints[1] * slope) + intercept; // predicted score
+          ypos := round(vhi * ( (Ymax - Yvalue) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := round(hwide * ( (Xpoints[1]- Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          Yvalue := (Xpoints[N] * slope) + intercept; // predicted score
+          ypos := round(vhi * ( (Ymax - Yvalue) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := round(hwide * ( (Xpoints[N] - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+     end;
+
+     // draw horizontal axis
+     BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+     BlankFrm.Image1.Canvas.MoveTo(hleft,vbottom);
+     BlankFrm.Image1.Canvas.LineTo(hright,vbottom);
+     valincr := (Xmax - Xmin) / 10.0;
+     for i := 1 to 11 do
+     begin
+          ypos := vbottom;
+          Xvalue := Xmin + valincr * (i - 1);
+          xpos := round(hwide * ((Xvalue - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          ypos := ypos + 10;
+          BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+          Title := format('%6.2f',[Xvalue]);
+          offset := BlankFrm.Image1.Canvas.TextWidth(Title) div 2;
+          xpos := xpos - offset;
+          BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+          BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+     end;
+     xpos := hleft + (hwide div 2) - (BlankFrm.Image1.Canvas.TextWidth(XEdit.Text) div 2);
+     ypos := vbottom + 20;
+     BlankFrm.Image1.Canvas.TextOut(xpos,ypos,XEdit.Text);
+     Title := format('R(X,Y) = %5.3f, Slope = %6.2f, Intercept = %6.2f',
+              [R,Slope,Intercept]);
+     xpos := hleft + (hwide div 2) - (BlankFrm.Image1.Canvas.TextWidth(Title) div 2);
+     ypos := ypos + 15;
+     BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+
+     // Draw vertical axis
+     Title := YEdit.Text;
+     xpos := hleft - BlankFrm.Image1.Canvas.TextWidth(Title) div 2;
+     ypos := vtop - BlankFrm.Image1.Canvas.TextHeight(Title);
+     BlankFrm.Image1.Canvas.TextOut(xpos,ypos,YEdit.Text);
+     xpos := hleft;
+     ypos := vtop;
+     BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+     ypos := vbottom;
+     BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+     valincr := (Ymax - Ymin) / 10.0;
+     for i := 1 to 11 do
+     begin
+          Title := format('%8.2f',[Ymax - ((i-1)*valincr)]);
+          strhi := BlankFrm.Image1.Canvas.TextHeight(Title);
+          xpos := 10;
+          Yvalue := Ymax - (valincr * (i-1));
+          ypos := round(vhi * ( (Ymax - Yvalue) / (Ymax - Ymin)));
+          ypos := ypos + vtop - strhi div 2;
+          BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+          xpos := hleft;
+          ypos := ypos + strhi div 2;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          xpos := hleft - 10;
+          BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+     end;
+
+     // draw points for x and y pairs
+     for i := 1 to N do
+     begin
+          ypos := round(vhi * ( (Ymax - Ypoints[i]) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := round(hwide * ( (Xpoints[i] - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.Brush.Color := clNavy;
+          BlankFrm.Image1.Canvas.Brush.Style := bsSolid;
+          BlankFrm.Image1.Canvas.Pen.Color := clNavy;
+          BlankFrm.Image1.Canvas.Ellipse(xpos,ypos,xpos+5,ypos+5);
+     end;
+
+     // draw confidence bands if requested
+     if ConfBand <> 0.0 then
+     begin
+          BlankFrm.Image1.Canvas.Pen.Color := clRed;
+          ypos := round(vhi * ((Ymax - UpConf[1]) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := round(hwide * ( (Xpoints[1] - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          for i := 2 to N do
+          begin
+               ypos := round(vhi * ((Ymax - UpConf[i]) / (Ymax - Ymin)));
+               ypos := ypos + vtop;
+               xpos := round(hwide * ( (Xpoints[i] - Xmin) / (Xmax - Xmin)));
+               xpos := xpos + hleft;
+               BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+          end;
+          ypos := round(vhi * ((Ymax - lowConf[1]) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := round(hwide * ( (Xpoints[1] - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          for i := 2 to N do
+          begin
+               ypos := round(vhi * ((Ymax - lowConf[i]) / (Ymax - Ymin)));
+               ypos := ypos + vtop;
+               xpos := round(hwide * ( (Xpoints[i] - Xmin) / (Xmax - Xmin)));
+               xpos := xpos + hleft;
+               BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+          end;
+     end;
+end;
+//-------------------------------------------------------------------
+(*
+procedure TPlotXYFrm.pplotxy(VAR Xpoints : DblDyneVec;
+                             VAR Ypoints : DblDyneVec;
+                             VAR UpConf : DblDyneVec;
+                             VAR LowConf : DblDyneVec;
+                             ConfBand : double;
+                             Xmean, Ymean , R : double;
+                             Slope, Intercept : double;
+                             Xmax, Xmin, Ymax, Ymin : double;
+                             N : integer);
+var
+   i, xpos, ypos, hleft, hright, vtop, vbottom, imagewide : integer;
+   vhi, hwide, offset, strhi : integer;
+   imagehi, maxval, minval, valincr, Yvalue, Xvalue : double;
+   Title : string;
+
+begin
+  if not PrintDialog.Execute then
+    exit;
+
+  Printer.Orientation := poLandscape;
+  Printer.BeginDoc;
+  Title := 'X versus Y PLOT Using File: ' + OS3MainFrm.FileNameEdit.Text;
+  strhi := Printer.Canvas.TextWidth(Title) div 2;
+  Printer.Canvas.TextOut(strhi,5,Title);
+  imagewide := Printer.PageWidth - 100;
+  imagehi := Printer.PageHeight - 100;
+  vtop := 120;
+  vbottom := round(imagehi) - 100;
+  vhi := vbottom - vtop;
+  hleft := 300;
+  hright := imagewide - 200;
+  hwide := hright - hleft;
+  Printer.Canvas.Pen.Color := clBlack;
+  Printer.Canvas.Brush.Color := clWhite;
+
+  // draw Means
+  if MeansChk.Checked then
+  begin
+      ypos := round(vhi * ( (Ymax - Ymean) / (Ymax - Ymin)));
+      ypos := ypos + vtop;
+      xpos := hleft;
+      Printer.Canvas.MoveTo(xpos,ypos);
+      xpos := hright;
+      Printer.Canvas.Pen.Color := clGreen;
+      Printer.Canvas.LineTo(xpos,ypos);
+      Title := 'MEAN ';
+      Title := Title + YEdit.Text;
+      strhi := Printer.Canvas.TextHeight(Title);
+      ypos := ypos - strhi div 2;
+      Printer.Canvas.Brush.Color := clWhite;
+      Printer.Canvas.TextOut(xpos,ypos,Title);
+
+      xpos := round(hwide * ( (Xmean - Xmin) / (Xmax - Xmin)));
+      xpos := xpos + hleft;
+      ypos := vtop;
+      Printer.Canvas.MoveTo(xpos,ypos);
+      ypos := vbottom;
+      Printer.Canvas.Pen.Color := clGreen;
+      Printer.Canvas.LineTo(xpos,ypos);
+      Title := 'MEAN ';
+      Title := Title + XEdit.Text;
+      strhi := Printer.Canvas.TextWidth(Title);
+      xpos := xpos - strhi div 2;
+      ypos := vtop - Printer.Canvas.TextHeight(Title);
+      Printer.Canvas.Brush.Color := clWhite;
+      Printer.Canvas.TextOut(xpos,ypos,Title);
+  end;
+
+  // draw slope line
+  if LineChk.Checked then
+  begin
+      Printer.Canvas.Pen.Color := clBlack;
+      Yvalue := (Xpoints[1] * slope) + intercept; // predicted score
+      ypos := round(vhi * ( (Ymax - Yvalue) / (Ymax - Ymin)));
+      ypos := ypos + vtop;
+      xpos := round(hwide * ( (Xpoints[1]- Xmin) / (Xmax - Xmin)));
+      xpos := xpos + hleft;
+      Printer.Canvas.MoveTo(xpos,ypos);
+      Yvalue := (Xpoints[N] * slope) + intercept; // predicted score
+      ypos := round(vhi * ( (Ymax - Yvalue) / (Ymax - Ymin)));
+      ypos := ypos + vtop;
+      xpos := round(hwide * ( (Xpoints[N] - Xmin) / (Xmax - Xmin)));
+      xpos := xpos + hleft;
+      Printer.Canvas.LineTo(xpos,ypos);
+  end;
+
+  // draw horizontal axis
+  Printer.Canvas.Pen.Color := clBlack;
+  Printer.Canvas.MoveTo(hleft,vbottom);
+  Printer.Canvas.LineTo(hright,vbottom);
+  valincr := (Xmax - Xmin) / 10.0;
+  for i := 1 to 11 do
+  begin
+      ypos := vbottom;
+      Xvalue := Xmin + valincr * (i - 1);
+      xpos := round(hwide * ((Xvalue - Xmin) / (Xmax - Xmin)));
+      xpos := xpos + hleft;
+      Printer.Canvas.MoveTo(xpos,ypos);
+      ypos := ypos + 10;
+      Printer.Canvas.LineTo(xpos,ypos);
+      Title := format('%6.2f',[Xvalue]);
+      offset := Printer.Canvas.TextWidth(Title) div 2;
+      xpos := xpos - offset;
+      Printer.Canvas.Pen.Color := clBlack;
+      Printer.Canvas.TextOut(xpos,ypos,Title);
+  end;
+  xpos := hleft + (hwide div 2) - (Printer.Canvas.TextWidth(XEdit.Text) div 2);
+  ypos := vbottom + 40;
+  Printer.Canvas.TextOut(xpos,ypos,XEdit.Text);
+  Title := format('R(X,Y) = %5.3f, Slope = %6.2f, Intercept = %6.2f',
+          [R,Slope,Intercept]);
+  xpos := hleft + (hwide div 2) - (Printer.Canvas.TextWidth(Title) div 2);
+  ypos := ypos + 40;
+  Printer.Canvas.TextOut(xpos,ypos,Title);
+
+  // Draw vertical axis
+  Title := YEdit.Text;
+  xpos := hleft - Printer.Canvas.TextWidth(Title) div 2;
+  ypos := vtop - Printer.Canvas.TextHeight(Title);
+  Printer.Canvas.TextOut(xpos,ypos,YEdit.Text);
+  xpos := hleft;
+  ypos := vtop;
+  Printer.Canvas.MoveTo(xpos,ypos);
+  ypos := vbottom;
+  Printer.Canvas.LineTo(xpos,ypos);
+  valincr := (Ymax - Ymin) / 10.0;
+  for i := 1 to 11 do
+  begin
+      Title := format('%8.2f',[Ymax - ((i-1)*valincr)]);
+      strhi := Printer.Canvas.TextHeight(Title);
+      xpos := 10;
+      Yvalue := Ymax - (valincr * (i-1));
+      ypos := round(vhi * ( (Ymax - Yvalue) / (Ymax - Ymin)));
+      ypos := ypos + vtop - strhi div 2;
+      Printer.Canvas.TextOut(xpos,ypos,Title);
+      xpos := hleft;
+      ypos := ypos + strhi div 2;
+      Printer.Canvas.MoveTo(xpos,ypos);
+      xpos := hleft - 10;
+      Printer.Canvas.LineTo(xpos,ypos);
+  end;
+
+  // draw points for x and y pairs
+  for i := 1 to N do
+  begin
+      ypos := round(vhi * ( (Ymax - Ypoints[i]) / (Ymax - Ymin)));
+      ypos := ypos + vtop;
+      xpos := round(hwide * ( (Xpoints[i] - Xmin) / (Xmax - Xmin)));
+      xpos := xpos + hleft;
+      Printer.Canvas.Pen.Color := clBlack;
+      Printer.Canvas.Ellipse(xpos,ypos,xpos+15,ypos+15);
+  end;
+
+  // draw confidence bands if requested
+  if ConfBand <> 0.0 then
+  begin
+      Printer.Canvas.Pen.Color := clRed;
+      ypos := round(vhi * ((Ymax - UpConf[1]) / (Ymax - Ymin)));
+      ypos := ypos + vtop;
+      xpos := round(hwide * ( (Xpoints[1] - Xmin) / (Xmax - Xmin)));
+      xpos := xpos + hleft;
+      Printer.Canvas.MoveTo(xpos,ypos);
+      for i := 2 to N do
+      begin
+           ypos := round(vhi * ((Ymax - UpConf[i]) / (Ymax - Ymin)));
+           ypos := ypos + vtop;
+           xpos := round(hwide * ( (Xpoints[i] - Xmin) / (Xmax - Xmin)));
+           xpos := xpos + hleft;
+           Printer.Canvas.LineTo(xpos,ypos);
+      end;
+      ypos := round(vhi * ((Ymax - lowConf[1]) / (Ymax - Ymin)));
+      ypos := ypos + vtop;
+      xpos := round(hwide * ( (Xpoints[1] - Xmin) / (Xmax - Xmin)));
+      xpos := xpos + hleft;
+      Printer.Canvas.MoveTo(xpos,ypos);
+      for i := 2 to N do
+      begin
+           ypos := round(vhi * ((Ymax - lowConf[i]) / (Ymax - Ymin)));
+           ypos := ypos + vtop;
+           xpos := round(hwide * ( (Xpoints[i] - Xmin) / (Xmax - Xmin)));
+           xpos := xpos + hleft;
+           Printer.Canvas.LineTo(xpos,ypos);
+      end;
+  end;
+
+  Printer.EndDoc;
+  Printer.Orientation := poPortrait;
+end;
+//-------------------------------------------------------------------
+*)
+function TPlotXYFrm.Validate(out AMsg: String; out AControl: TWinControl;
+  Xcol, Ycol: Integer): Boolean;
+begin
+  Result := false;
+
+  if (Xcol = 0) then
+  begin
+    AControl := XEdit;
+    AMsg := 'No case selected for X.';
+    exit;
+  end;
+
+  if (Ycol = 0) then
+  begin
+    AControl := YEdit;
+    AMsg := 'No case selected for Y.';
+    exit;
+  end;
+  Result := true;
+end;
+
+procedure TPlotXYFrm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+procedure TPlotXYFrm.UpdateBtnStates;
+begin
+  XinBtn.Enabled := (VarList.ItemIndex > -1) and (XEdit.Text = '');
+  XoutBtn.Enabled := (XEdit.Text <> '');
+  YinBtn.Enabled := (VarList.ItemIndex > -1) and (YEdit.Text = '');
+  YoutBtn.Enabled := (YEdit.Text <> '');
+end;
+
+initialization
+  {$I plotxyunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/resistancelineunit.lfm

@@ -0,0 +1,568 @@
+object ResistanceLineForm: TResistanceLineForm
+  Left = 581
+  Height = 480
+  Top = 301
+  Width = 535
+  Caption = 'Resistant Line for Bivariate Data'
+  ClientHeight = 480
+  ClientWidth = 535
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = ResetBtnClick
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = HorCenterBevel
+    AnchorSideTop.Side = asrBottom
+    Left = 8
+    Height = 15
+    Top = 144
+    Width = 46
+    BorderSpacing.Left = 8
+    Caption = 'Variables'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = XEdit
+    AnchorSideTop.Control = Label1
+    Left = 188
+    Height = 15
+    Top = 144
+    Width = 93
+    Caption = 'Selected Variables'
+    ParentColor = False
+  end
+  object Label3: TLabel
+    AnchorSideLeft.Control = XEdit
+    AnchorSideBottom.Control = XEdit
+    Left = 188
+    Height = 15
+    Top = 183
+    Width = 51
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 2
+    Caption = 'X Variable'
+    ParentColor = False
+  end
+  object Label4: TLabel
+    AnchorSideLeft.Control = YEdit
+    AnchorSideBottom.Control = YEdit
+    Left = 188
+    Height = 15
+    Top = 300
+    Width = 51
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 2
+    Caption = 'Y Variable'
+    ParentColor = False
+  end
+  object XEdit: TEdit
+    AnchorSideLeft.Control = XInBtn
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideRight.Control = GroupBox1
+    AnchorSideBottom.Control = XOutBtn
+    AnchorSideBottom.Side = asrBottom
+    Left = 188
+    Height = 23
+    Top = 200
+    Width = 136
+    Anchors = [akLeft, akRight, akBottom]
+    BorderSpacing.Right = 16
+    BorderSpacing.Bottom = 12
+    ReadOnly = True
+    TabOrder = 3
+    Text = 'XEdit'
+  end
+  object YEdit: TEdit
+    AnchorSideLeft.Control = XEdit
+    AnchorSideRight.Control = XEdit
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = YOutBtn
+    AnchorSideBottom.Side = asrBottom
+    Left = 188
+    Height = 23
+    Top = 317
+    Width = 136
+    Anchors = [akLeft, akRight, akBottom]
+    BorderSpacing.Bottom = 12
+    ReadOnly = True
+    TabOrder = 6
+    Text = 'Edit1'
+  end
+  object XInBtn: TBitBtn
+    AnchorSideLeft.Control = HorCenterBevel
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideRight.Control = XEdit
+    AnchorSideBottom.Control = XOutBtn
+    Left = 152
+    Height = 28
+    Top = 175
+    Width = 28
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 4
+    Glyph.Data = {
+      36040000424D3604000000000000360000002800000010000000100000000100
+      2000000000000004000064000000640000000000000000000000FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00216324B81D5E2006FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF002A702F38256929F7216324D9FFFFFF00FFFFFF00FFFFFF00FFFFFF0061BE
+      6DFF5DB868FF58B162FF53A95CFF4DA156FF47994FFF419149FF3B8842FF3580
+      3BFF3F8845FF59A15EFF448B49FF216324CFFFFFFF00FFFFFF00FFFFFF0065C3
+      71FFA0D7A9FF9CD5A5FF98D3A1FF94D09DFF90CE98FF8BCB93FF87C98EFF82C6
+      89FF7EC384FF7AC180FF76BE7CFF458C4AFF216324C4FFFFFF00FFFFFF0068C7
+      74FFA5DAAEFFA2D8ABFF9ED6A7FF9AD4A3FF96D29FFF93CF9AFF8ECC95FF89CA
+      90FF85C78BFF81C587FF7DC282FF4A9150FF256929C9FFFFFF00FFFFFF0068C7
+      74FF68C774FF65C371FF61BE6DFF5DB868FF58B162FF53A95CFF4DA156FF4799
+      4FFF419149FF5AA362FF559D5CFF2F7835D1FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00419149F73B8842DBFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0047994FBB41914906FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+    }
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = XInBtnClick
+    Spacing = 0
+    TabOrder = 1
+  end
+  object YInBtn: TBitBtn
+    AnchorSideLeft.Control = HorCenterBevel
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = YEdit
+    Left = 152
+    Height = 28
+    Top = 292
+    Width = 28
+    BorderSpacing.Right = 8
+    Glyph.Data = {
+      36040000424D3604000000000000360000002800000010000000100000000100
+      2000000000000004000064000000640000000000000000000000FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00216324B81D5E2006FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF002A702F38256929F7216324D9FFFFFF00FFFFFF00FFFFFF00FFFFFF0061BE
+      6DFF5DB868FF58B162FF53A95CFF4DA156FF47994FFF419149FF3B8842FF3580
+      3BFF3F8845FF59A15EFF448B49FF216324CFFFFFFF00FFFFFF00FFFFFF0065C3
+      71FFA0D7A9FF9CD5A5FF98D3A1FF94D09DFF90CE98FF8BCB93FF87C98EFF82C6
+      89FF7EC384FF7AC180FF76BE7CFF458C4AFF216324C4FFFFFF00FFFFFF0068C7
+      74FFA5DAAEFFA2D8ABFF9ED6A7FF9AD4A3FF96D29FFF93CF9AFF8ECC95FF89CA
+      90FF85C78BFF81C587FF7DC282FF4A9150FF256929C9FFFFFF00FFFFFF0068C7
+      74FF68C774FF65C371FF61BE6DFF5DB868FF58B162FF53A95CFF4DA156FF4799
+      4FFF419149FF5AA362FF559D5CFF2F7835D1FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00419149F73B8842DBFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0047994FBB41914906FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+    }
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = YInBtnClick
+    Spacing = 0
+    TabOrder = 4
+  end
+  object XOutBtn: TBitBtn
+    AnchorSideLeft.Control = XInBtn
+    AnchorSideBottom.Control = Bevel1
+    Left = 152
+    Height = 28
+    Top = 207
+    Width = 28
+    Anchors = [akLeft, akBottom]
+    Glyph.Data = {
+      36040000424D3604000000000000360000002800000010000000100000000100
+      2000000000000004000064000000640000000000000000000000FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF004DA1560647994FB8FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0053A95CD94DA156F747994F38FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF005DB868CF71BE7BFF7AC183FF5BAA64FF47994FFF419149FF3B8842FF3580
+      3BFF2F7835FF2A702FFF256929FF216324FF1D5E20FFFFFFFF00FFFFFF0065C3
+      71C47BC886FF9CD5A5FF98D3A1FF94D09DFF90CE98FF8BCB93FF87C98EFF82C6
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+      74C97FCC8AFFA2D8ABFF9ED6A7FF9AD4A3FF96D29FFF93CF9AFF8ECC95FF89CA
+      90FF85C78BFF81C587FF7DC282FF78C07EFF256929FFFFFFFF00FFFFFF00FFFF
+      FF0068C774D180CD8BFF7CC987FF5DB868FF58B162FF53A95CFF4DA156FF4799
+      4FFF419149FF3B8842FF35803BFF2F7835FF2A702FFFFFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0068C774DB65C371F7FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0068C7740668C774BBFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+    }
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = XOutBtnClick
+    Spacing = 0
+    TabOrder = 2
+  end
+  object YOutBtn: TBitBtn
+    AnchorSideLeft.Control = YInBtn
+    AnchorSideTop.Control = YInBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 152
+    Height = 28
+    Top = 324
+    Width = 28
+    BorderSpacing.Top = 4
+    Glyph.Data = {
+      36040000424D3604000000000000360000002800000010000000100000000100
+      2000000000000004000064000000640000000000000000000000FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF004DA1560647994FB8FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0053A95CD94DA156F747994F38FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF005DB868CF71BE7BFF7AC183FF5BAA64FF47994FFF419149FF3B8842FF3580
+      3BFF2F7835FF2A702FFF256929FF216324FF1D5E20FFFFFFFF00FFFFFF0065C3
+      71C47BC886FF9CD5A5FF98D3A1FF94D09DFF90CE98FF8BCB93FF87C98EFF82C6
+      89FF7EC384FF7AC180FF76BE7CFF72BD78FF216324FFFFFFFF00FFFFFF0068C7
+      74C97FCC8AFFA2D8ABFF9ED6A7FF9AD4A3FF96D29FFF93CF9AFF8ECC95FF89CA
+      90FF85C78BFF81C587FF7DC282FF78C07EFF256929FFFFFFFF00FFFFFF00FFFF
+      FF0068C774D180CD8BFF7CC987FF5DB868FF58B162FF53A95CFF4DA156FF4799
+      4FFF419149FF3B8842FF35803BFF2F7835FF2A702FFFFFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0068C774DB65C371F7FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF0068C7740668C774BBFFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFF
+      FF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00FFFFFF00
+    }
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = YOutBtnClick
+    Spacing = 0
+    TabOrder = 5
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 326
+    Height = 25
+    Top = 447
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 11
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 388
+    Height = 25
+    Top = 447
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 12
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 472
+    Height = 25
+    Top = 447
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 13
+  end
+  object GroupBox1: TGroupBox
+    AnchorSideTop.Control = Label1
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 340
+    Height = 152
+    Top = 144
+    Width = 187
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Right = 8
+    Caption = 'Options'
+    ClientHeight = 132
+    ClientWidth = 183
+    Enabled = False
+    TabOrder = 7
+    object Label5: TLabel
+      AnchorSideLeft.Control = GroupBox1
+      AnchorSideTop.Control = ConfEdit
+      AnchorSideTop.Side = asrCenter
+      Left = 32
+      Height = 15
+      Top = 101
+      Width = 74
+      BorderSpacing.Left = 32
+      Caption = '% Confidence'
+      ParentColor = False
+    end
+    object DescChk: TCheckBox
+      AnchorSideLeft.Control = GroupBox1
+      AnchorSideTop.Control = PointsChk
+      AnchorSideTop.Side = asrBottom
+      Left = 12
+      Height = 19
+      Top = 21
+      Width = 155
+      BorderSpacing.Left = 12
+      Caption = 'Print Descriptive Statistics'
+      TabOrder = 1
+    end
+    object ConfEdit: TEdit
+      AnchorSideLeft.Control = Label5
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = ConfChk
+      AnchorSideTop.Side = asrBottom
+      Left = 114
+      Height = 23
+      Top = 97
+      Width = 57
+      Alignment = taRightJustify
+      BorderSpacing.Left = 8
+      BorderSpacing.Right = 12
+      BorderSpacing.Bottom = 12
+      TabOrder = 5
+      Text = '95.0'
+    end
+    object LineChk: TCheckBox
+      AnchorSideLeft.Control = GroupBox1
+      AnchorSideTop.Control = DescChk
+      AnchorSideTop.Side = asrBottom
+      Left = 12
+      Height = 19
+      Top = 40
+      Width = 146
+      BorderSpacing.Left = 12
+      Caption = 'Plot the Regression Line'
+      TabOrder = 2
+    end
+    object MeansChk: TCheckBox
+      AnchorSideLeft.Control = GroupBox1
+      AnchorSideTop.Control = LineChk
+      AnchorSideTop.Side = asrBottom
+      Left = 12
+      Height = 19
+      Top = 59
+      Width = 99
+      BorderSpacing.Left = 12
+      Caption = 'Plot the Means'
+      TabOrder = 3
+    end
+    object ConfChk: TCheckBox
+      AnchorSideLeft.Control = GroupBox1
+      AnchorSideTop.Control = MeansChk
+      AnchorSideTop.Side = asrBottom
+      Left = 12
+      Height = 19
+      Top = 78
+      Width = 155
+      BorderSpacing.Left = 12
+      Caption = 'Plot the Confidence Band'
+      TabOrder = 4
+    end
+    object PointsChk: TCheckBox
+      AnchorSideLeft.Control = GroupBox1
+      AnchorSideTop.Control = GroupBox1
+      Left = 12
+      Height = 19
+      Top = 2
+      Width = 153
+      BorderSpacing.Left = 12
+      BorderSpacing.Top = 2
+      Caption = 'Plot All of the points First'
+      TabOrder = 0
+    end
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = XInBtn
+    AnchorSideBottom.Control = StdCorChk
+    Left = 8
+    Height = 205
+    Top = 161
+    Width = 136
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Constraints.MinHeight = 200
+    ItemHeight = 0
+    OnSelectionChange = VarListSelectionChange
+    TabOrder = 0
+  end
+  object StdCorChk: TCheckBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = PlotMediansChk
+    Left = 8
+    Height = 19
+    Top = 374
+    Width = 330
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    Caption = 'Option: Compute a standard product-moment correlation.'
+    OnChange = StdCorChkChange
+    TabOrder = 8
+  end
+  object PlotMediansChk: TCheckBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = GridChk
+    Left = 8
+    Height = 19
+    Top = 393
+    Width = 265
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    Caption = 'Plot the Three Medians and Slope Line (in Red)'
+    TabOrder = 9
+  end
+  object GridChk: TCheckBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = Bevel2
+    Left = 8
+    Height = 19
+    Top = 412
+    Width = 248
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    Caption = 'Enter Predicted Y and Residual Y in the Grid'
+    TabOrder = 10
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = YInBtn
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = VarList
+    AnchorSideTop.Side = asrCenter
+    Left = 161
+    Height = 57
+    Top = 235
+    Width = 10
+    Shape = bsSpacer
+  end
+  object Bevel2: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 0
+    Height = 8
+    Top = 431
+    Width = 535
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+  object Memo1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 8
+    Height = 120
+    Top = 8
+    Width = 519
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'The Resistant Line procedure creates three equal groups by sorting on the  X variable and obtaining the median  value of each group.'#13#10#13#10'The median values for these three groups on both the X and Y variables  are then plotted.  The line from the  low group median to the middle  group median is plotted as well as  the line from the middle group to  the top group median.  A comparison  of the slope of these two lines gives an indication of the degree to which  the data fit a straight line. Enter the X and Y variables to be  analyzed and click the compute button.'
+    ParentColor = False
+    WordWrap = True
+  end
+  object HorCenterBevel: TBevel
+    AnchorSideLeft.Control = VarList
+    AnchorSideTop.Control = Memo1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = XEdit
+    AnchorSideRight.Side = asrBottom
+    Left = 8
+    Height = 16
+    Top = 128
+    Width = 316
+    Anchors = [akTop, akLeft, akRight]
+    Shape = bsSpacer
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/resistancelineunit.pas

@@ -0,0 +1,747 @@
+// Use file "Sickness.laz" for testing
+
+unit ResistanceLineUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls, Buttons, Printers,
+  MainUnit, Globals, FunctionsLib, OutputUnit, DataProcs, DictionaryUnit,
+  ContextHelpUnit, BlankFrmUnit;
+
+type
+
+  { TResistanceLineForm }
+
+  TResistanceLineForm = class(TForm)
+    Bevel1: TBevel;
+    Bevel2: TBevel;
+    HorCenterBevel: TBevel;
+    GridChk: TCheckBox;
+    Memo1: TLabel;
+    PlotMediansChk: TCheckBox;
+    StdCorChk: TCheckBox;
+    PointsChk: TCheckBox;
+    ConfChk: TCheckBox;
+    ConfEdit: TEdit;
+    DescChk: TCheckBox;
+    GroupBox1: TGroupBox;
+    Label5: TLabel;
+    LineChk: TCheckBox;
+    VarList: TListBox;
+    MeansChk: TCheckBox;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    CloseBtn: TButton;
+    XInBtn: TBitBtn;
+    YInBtn: TBitBtn;
+    XOutBtn: TBitBtn;
+    YOutBtn: TBitBtn;
+    XEdit: TEdit;
+    YEdit: TEdit;
+    Label1: TLabel;
+    Label2: TLabel;
+    Label3: TLabel;
+    Label4: TLabel;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure StdCorChkChange(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+    procedure XInBtnClick(Sender: TObject);
+    procedure XOutBtnClick(Sender: TObject);
+    procedure YInBtnClick(Sender: TObject);
+    procedure YOutBtnClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    function Median(var X: DblDyneVec; ASize: integer): double;
+    procedure PlotXY(var Xpoints, YPoints, UpConf, LowConf: DblDyneVec;
+      ConfBand: double; Xmean, Ymean, R, Slope, Intercept: double;
+      Xmax, Xmin, Ymax, Ymin: double; N, PlotNo: integer);
+    procedure UpdateBtnStates;
+
+  public
+    { public declarations }
+  end; 
+
+var
+  ResistanceLineForm: TResistanceLineForm;
+
+implementation
+
+uses
+  Math;
+
+{ TResistanceLineForm }
+
+procedure TResistanceLineForm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  StdCorChk.Checked := false;
+  GridChk.Checked := false;
+  PlotMediansChk.Checked := false;
+  XEdit.Text := '';
+  YEdit.Text := '';
+  VarList.Clear;
+  ConfEdit.Text := FormatFloat('0.0', DEFAULT_CONFIDENCE_LEVEL_PERCENT);
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  UpdateBtnStates;
+end;
+
+procedure TResistanceLineForm.StdCorChkChange(Sender: TObject);
+begin
+  if StdCorChk.Checked then GroupBox1.Enabled := true else GroupBox1.Enabled := false;
+end;
+
+procedure TResistanceLineForm.ComputeBtnClick(Sender: TObject);
+var
+  XYPoints : DblDyneMat;
+  XYMedians : DblDyneMat;
+  XMedians : DblDyneVec;
+  YMedians : DblDyneVec;
+  XVector, YVector : DblDyneVec;
+  cellstring, outline : string;
+  ColNoSelected : IntDyneVec;
+  UpConf  : DblDyneVec;
+  lowConf : DblDyneVec;
+  GrpSize : IntDyneVec;
+  Xcol, Ycol, N, NoSelected, i, j, size, size1, size2, size3 : integer;
+  X, Y, tempX, tempY : double;
+  Xmin, Xmax, Ymin, Ymax, SSx, t, DF : double;
+  Xmean, Ymean, Xvariance, Yvariance, Xstddev, Ystddev, ConfBand : double;
+  R, SEPred, Slope, Intercept, predicted, sedata : double;
+  slope1, slope2 : double;
+  c, c1, c2, c3 : double; // constants obtained from control points
+  lReport: TStrings;
+begin
+  SetLength(XYPoints, NoCases, NoCases);
+  SetLength(XYMedians, 3, 3);
+  SetLength(XMedians, 3);
+  SetLength(YMedians, 3);
+  SetLength(XVector, NoCases);
+  SetLength(YVector, NoCases);
+  SetLength(ColNoSelected, NoVariables);
+  SetLength(UpConf, NoCases + 1);
+  SetLength(lowConf, NoCases + 1);
+  SetLength(GrpSize, 3);
+  Xcol := 0;
+  Ycol := 0;
+  Xmax := -1.0e20;
+  Xmin := 1.0e20;
+  Ymax := -1.0e20;
+  Ymin := 1.0e20;
+  Xmean := 0.0;
+  Ymean := 0.0;
+  Xvariance := 0.0;
+  Yvariance := 0.0;
+  R := 0.0;
+
+  for i := 1 to Novariables do
+  begin
+    cellstring := OS3MainFrm.DataGrid.Cells[i,0];
+    if cellstring = XEdit.Text then Xcol := i;
+    if cellstring = YEdit.Text then Ycol := i;
+  end;
+  NoSelected := 2;
+  ColNoSelected[0] := Xcol;
+  ColNoSelected[1] := Ycol;
+  N := 0;
+  for i := 1 to NoCases do
+  begin
+    if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+    X := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[Xcol,i]));
+    Y := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[Ycol,i]));
+    if X > Xmax then Xmax := X;
+    if X < Xmin then Xmin := X;
+    if Y > Ymax then Ymax := Y;
+    if Y < Ymin then Ymin := Y;
+    Xmean := Xmean + X;
+    Ymean := Ymean + Y;
+    Xvariance := Xvariance + X * X;
+    Yvariance := Yvariance + Y * Y;
+    R := R + X * Y;
+    XYPoints[N,0] := X;
+    XYPoints[N,1] := Y;
+    inc(N);
+  end;
+
+  // sort on X values
+  for i := 0 to N-2 do
+  begin
+    for j := i + 1 to N-1 do
+    begin
+      if XYPoints[i,0] > XYPoints[j,0] then // swap
+      begin
+        tempX := XYPoints[i,0];
+        tempY := XYPoints[i,1];
+        XYPoints[i,0] := XYPoints[j,0];
+        XYPoints[i,1] := XYPoints[j,1];
+        XYPoints[j,0] := tempX;
+        XYPoints[j,1] := tempY;
+      end;
+    end;
+  end;
+
+  // calculate statistics
+  Xvariance := Xvariance - Xmean * Xmean / N;
+  SSx := Xvariance;
+  Xvariance := Xvariance / (N - 1);
+  Xstddev := sqrt(Xvariance);
+
+  Yvariance := Yvariance - Ymean * Ymean / N;
+  Yvariance := Yvariance / (N - 1);
+  Ystddev := sqrt(Yvariance);
+
+  R := R - (Xmean * Ymean / N);
+  R := R / (N - 1);
+  R := R / (Xstddev * Ystddev);
+
+  SEPred := sqrt(1.0 - (R * R)) * Ystddev;
+  SEPred := SEPred * sqrt((N - 1) / (N - 2));
+
+  Xmean := Xmean / N;
+  Ymean := Ymean / N;
+  Slope := R * Ystddev / Xstddev;
+  Intercept := Ymean - Slope * Xmean;
+
+  // Now, print the descriptive statistics if requested
+  lReport := TStringList.Create;
+  try
+    if DescChk.Checked then
+    begin
+      lReport.Add('Original X versus Y Plot Data');
+      lReport.Add('');
+      lReport.Add('X = %s, Y = %s from file: %s',[
+        Xedit.Text, YEdit.Text, OS3MainFrm.FileNameEdit.Text
+      ]);
+      lReport.Add('');
+      lReport.Add('Variable     Mean   Variance  Std.Dev.');
+      lReport.Add('%-10s%8.2f  %8.2f  %8.2f', [XEdit.Text, Xmean, Xvariance, Xstddev]);
+      lReport.Add('%-10s%8.2f  %8.2f  %8.2f', [YEdit.Text, Ymean, Yvariance, Ystddev]);
+      lReport.Add('');
+      lReport.Add('Correlation:                %8.4f', [R]);
+      lReport.Add('Slope:                      %8.2f', [Slope]);
+      lReport.Add('Intercept:                  %8.2f', [Intercept]);
+      lReport.Add('Standard Error of Estimate: %8.2f', [SEPred]);
+      lReport.Add('Number of good cases:       %8d', [N]);
+      lReport.Add('');
+    end;
+
+    // get upper and lower confidence points for each X value
+    if ConfChk.Checked then
+    begin
+      ConfBand := StrToFloat(ConfEdit.Text) / 100.0;
+      DF := N - 2;
+      t := inverset(ConfBand,DF);
+      for i := 1 to N do
+      begin
+        X := XYpoints[i-1,0];
+        predicted := slope * X + intercept;
+        sedata := SEPred * sqrt(1.0 + (1.0 / N) + (sqr(X - Xmean) / SSx));
+        UpConf[i] := predicted + (t * sedata);
+        lowConf[i] := predicted - (t * sedata);
+        if UpConf[i] > Ymax then Ymax := UpConf[i];
+        if lowConf[i] < Ymin then Ymin := lowConf[i];
+      end;
+    end else
+      ConfBand := 0.0;
+
+    // plot the values (and optional line and confidence band if elected)
+    if PointsChk.Checked then
+    begin
+      for i := 0 to N-1 do
+      begin
+        XVector[i] := XYPoints[i,0];
+        YVector[i] := XYPoints[i,1];
+      end;
+      PlotXY(
+        XVector, YVector, UpConf, LowConf, ConfBand, Xmean, Ymean, R,
+        Slope, Intercept, Xmax, Xmin, Ymax, Ymin, N, 1
+      );
+    end;
+    //LineChk.Checked := false;
+    //ConfChk.Checked := false;
+    ConfBand := 0.0;
+
+    // Now do the resistant line analysis
+    // obtain 1/3 size
+    size := n div 3;
+    size1 := size;
+    size3 := size;
+    size2 := n - size1 - size3;
+    GrpSize[0] := size1;
+    GrpSize[1] := size2;
+    GrpSize[2] := size3;
+
+    // get median for each group of x and y values
+    // first group:
+    for i := 0 to size1-1 do
+    begin
+      XVector[i] := XYPoints[i,0];
+      YVector[i] := XYPoints[i,1];
+    end;
+    XMedians[0] := Median(XVector,size1);
+    YMedians[0] := Median(YVector,size1);
+
+    // second group
+    j := 0;
+    for i := size1 to size1 + size2 - 1 do
+    begin
+      XVector[j] := XYPoints[i,0];
+      YVector[j] := XYPoints[i,1];
+      inc(j);
+    end;
+    XMedians[1] := Median(XVector,size2);
+    YMedians[1] := Median(YVector,size2);
+
+    // third group
+    j := 0;
+    for i := (size1 + size2) to N-1 do
+    begin
+      XVector[j] := XYPoints[i,0];
+      YVector[j] := XYPoints[i,1];
+      inc(j);
+    end;
+    XMedians[2] := Median(XVector,size3);
+    YMedians[2] := Median(YVector,size3);
+
+    lReport.Add('Group   X Median    Y Median    Size');
+    for i := 0 to 2 do
+      lReport.Add('%3d     %5.3f     %5.3f     %d', [i+1, XMedians[i], YMedians[i], GrpSize[i]]);
+    lReport.Add('');
+
+    slope1 := (YMedians[1] - YMedians[0]) / (XMedians[1] - XMedians[0]);
+    slope2 := (YMedians[2] - YMedians[1]) / (XMedians[2] - XMedians[1]);
+    lReport.Add('Half Slopes:          %10.3f and %.3f', [slope1, slope2]);
+
+    Slope := (YMedians[2] - YMedians[0]) / (XMedians[2] - XMedians[0]);
+    lReport.Add('Slope:                %10.3f', [Slope]);
+
+    tempx := slope2 / slope1;
+    lReport.Add('Ratio of half slopes: %10.3f',[tempx]);
+
+    // obtain estimate of the constant for the prediction equation
+    c1 := slope * XMedians[0] - YMedians[0];
+    c2 := slope * XMedians[1] - YMedians[1];
+    c3 := slope * XMedians[2] - YMedians[2];
+    c := (c1 + c2 + c3) / 3.0;
+    lReport.Add('Equation:  y := %.3f * X + (%.3f)', [slope, c]);
+
+    if GridChk.Checked then
+    begin
+      // Get the residuals (Y - predicted Y) for each X value and place in the grid
+      outline := 'Pred.' + OS3MainFrm.DataGrid.Cells[Ycol,0];
+      DictionaryFrm.NewVar(NoVariables+1);
+      DictionaryFrm.DictGrid.Cells[1,NoVariables] := outline;
+      OS3MainFrm.DataGrid.Cells[NoVariables,0] := outline;
+
+      outline := 'Residual';
+      DictionaryFrm.NewVar(NoVariables+1);
+      DictionaryFrm.DictGrid.Cells[1,NoVariables] := outline;
+      OS3MainFrm.DataGrid.Cells[NoVariables,0] := outline;
+
+      for i := 1 to NoCases do
+      begin
+        if not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        X := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[Xcol,i]));
+        Y := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[Ycol,i]));
+        if c >= 0 then
+          predicted := slope * X + c
+        else
+          predicted := slope * X - c;
+        Y := Y - predicted;  // residual
+        outline := Format('%9.3f',[predicted]);
+        OS3MainFrm.DataGrid.Cells[NoVariables-1,i] := outline;
+        outline := Format('%9.3f',[Y]);
+        OS3MainFrm.DataGrid.Cells[NoVariables,i] := outline;
+      end;
+    end;
+
+    DisplayReport(lReport);
+
+    // plot the values (and optional line and confidence band if elected)
+    if PlotMediansChk.Checked then
+      PlotXY(
+        XMedians, YMedians, UpConf, LowConf, ConfBand, Xmean, Ymean, R,
+        Slope, Intercept, Xmax, Xmin, Ymax, Ymin, 3, 2
+      );
+
+  finally
+     lReport.Free;
+     GrpSize := nil;
+     LowConf := nil;
+     UpConf := nil;
+     ColNoSelected := nil;
+     YVector := nil;
+     XVector := nil;
+     YMedians := nil;
+     XMedians := nil;
+     XYMedians := nil;
+     XYPoints := nil;
+  end;
+end;
+
+procedure TResistanceLineForm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  //VarList.Constraints.MinWidth := XEdit.Width;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TResistanceLineForm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+
+  if BlankFrm = nil then Application.CreateForm(TBlankFrm, BlankFrm);
+  if DictionaryFrm = nil then Application.CreateForm(TDictionaryFrm, DictionaryFrm);
+end;
+
+procedure TResistanceLineForm.XInBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if (index > -1) and (XEdit.Text = '') then
+  begin
+    XEdit.Text := VarList.items[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TResistanceLineForm.XOutBtnClick(Sender: TObject);
+begin
+  if XEdit.Text <> '' then
+  begin
+    VarList.Items.Add(XEdit.Text);
+    XEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TResistanceLineForm.YInBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if (index > -1) and (YEdit.Text = '') then
+  begin
+    YEdit.Text := VarList.items[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TResistanceLineForm.YOutBtnClick(Sender: TObject);
+begin
+  if YEdit.Text <> '' then
+  begin
+    VarList.Items.Add(YEdit.Text);
+    YEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+function TResistanceLineForm.Median(VAR X: DblDyneVec; ASize: integer): double;
+var
+  midpt: integer;
+  value: double;
+  i, j: integer;
+begin
+  // sort values
+  for i := 0 to ASize-2 do
+  begin
+    for j := i + 1 to ASize-1 do
+    begin
+      if X[i] > X[j] then // swap
+      begin
+        value := X[i];
+        X[i] := X[j];
+        X[j] := value;
+      end;
+    end;
+  end;
+
+  if ASize > 2 then
+  begin
+    midpt := ASize div 2;
+    if 2 * midpt = ASize then  // even no. of values
+    begin
+      value := (X[midpt-1] + X[midpt]) / 2;
+    end else
+      value := X[midpt];  // odd no. of values
+    Median := value;
+  end else
+  if ASize = 2 then
+    Median := (X[0] + X[1]) / 2;
+
+  Result := Median;
+end;
+
+procedure TResistanceLineForm.PlotXY(var Xpoints, Ypoints, UpConf, LowConf: DblDyneVec;
+  ConfBand, XMean, YMean, R, Slope, Intercept: double;
+  Xmax, Xmin, Ymax, Ymin: double; N, PlotNo: integer);
+var
+  i, xpos, ypos, hleft, hright, vtop, vbottom, imagewide: integer;
+  vhi, hwide, offset, strhi, imagehi: integer;
+  valincr, Yvalue, Xvalue: double;
+  Title: string;
+  YU, YL, XU, XL: double;
+begin
+     BlankFrm.Image1.Canvas.Clear;
+     if PlotNo = 1 then
+     begin
+          Title := 'X versus Y PLOT Using File: ' + OS3MainFrm.FileNameEdit.Text;
+          BlankFrm.Caption := Title;
+     end
+     else
+     begin
+          Title := 'Median Plot for three groups';
+          BlankFrm.Caption := Title;
+     end;
+     imagewide := BlankFrm.Image1.Width;
+     imagehi := BlankFrm.Image1.Height;
+     vtop := 40;
+     vbottom := round(imagehi) - 80;
+     vhi := vbottom - vtop;
+     hleft := 100;
+     hright := imagewide - 80;
+     hwide := hright - hleft;
+     BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+     BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+
+     // Draw chart border
+     BlankFrm.Image1.Canvas.Rectangle(0,0,imagewide,imagehi);
+
+     // draw Means
+     if MeansChk.Checked then
+     begin
+          ypos := round(vhi * ( (Ymax - Ymean) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := hleft;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          xpos := hright;
+          BlankFrm.Image1.Canvas.Pen.Color := clGreen;
+          BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+          Title := 'MEAN ';
+          Title := Title + YEdit.Text;
+          strhi := BlankFrm.Image1.Canvas.TextHeight(Title);
+          ypos := ypos - strhi div 2;
+          BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+          BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+
+          xpos := round(hwide * ( (Xmean - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          ypos := vtop;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          ypos := vbottom;
+          BlankFrm.Image1.Canvas.Pen.Color := clGreen;
+          BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+          Title := 'MEAN ';
+          Title := Title + XEdit.Text;
+          strhi := BlankFrm.Image1.Canvas.TextWidth(Title);
+          xpos := xpos - strhi div 2;
+          ypos := vtop - BlankFrm.Image1.Canvas.TextHeight(Title);
+          BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+          BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+     end;
+
+     // draw slope line
+     if LineChk.Checked then
+     begin
+          BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+          Yvalue := (Xpoints[0] * slope) + intercept; // predicted score
+          ypos := round(vhi * ( (Ymax - Yvalue) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := round(hwide * ( (Xpoints[0]- Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          Yvalue := (Xpoints[N-1] * slope) + intercept; // predicted score
+          ypos := round(vhi * ( (Ymax - Yvalue) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := round(hwide * ( (Xpoints[N-1] - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+     end;
+
+     // draw horizontal axis
+     BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+     BlankFrm.Image1.Canvas.MoveTo(hleft,vbottom);
+     BlankFrm.Image1.Canvas.LineTo(hright,vbottom);
+     valincr := (Xmax - Xmin) / 10.0;
+     for i := 1 to 11 do
+     begin
+          ypos := vbottom;
+          Xvalue := Xmin + valincr * (i - 1);
+          xpos := round(hwide * ((Xvalue - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          ypos := ypos + 10;
+          BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+          Title := format('%.2f',[Xvalue]);
+          offset := BlankFrm.Image1.Canvas.TextWidth(Title) div 2;
+          xpos := xpos - offset;
+          BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+          BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+     end;
+     if PlotNo = 1 then
+     begin
+          xpos := hleft + (hwide div 2) - (BlankFrm.Image1.Canvas.TextWidth(XEdit.Text) div 2);
+          ypos := vbottom + 20;
+          BlankFrm.Image1.Canvas.TextOut(xpos,ypos,XEdit.Text);
+          Title := format('R(X,Y) = %.3f, Slope = %.2f, Intercept = %.2f',
+              [R,Slope,Intercept]);
+          xpos := hleft + (hwide div 2) - (BlankFrm.Image1.Canvas.TextWidth(Title) div 2);
+          ypos := ypos + 15;
+          BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+     end;
+
+     // Draw vertical axis
+     Title := YEdit.Text;
+     xpos := hleft - BlankFrm.Image1.Canvas.TextWidth(Title) div 2;
+     ypos := vtop - BlankFrm.Image1.Canvas.TextHeight(Title) - 10;
+     BlankFrm.Image1.Canvas.TextOut(xpos,ypos,YEdit.Text);
+     xpos := hleft;
+     ypos := vtop;
+     BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+     ypos := vbottom;
+     BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+     valincr := (Ymax - Ymin) / 10.0;
+     for i := 1 to 11 do
+     begin
+          Title := format('%.2f',[Ymax - ((i-1)*valincr)]);
+          strhi := BlankFrm.Image1.Canvas.TextHeight(Title);
+          xpos := hLeft - 20 - BlankFrm.Image1.Canvas.TextWidth(Title); //10;
+          Yvalue := Ymax - (valincr * (i-1));
+          ypos := round(vhi * ( (Ymax - Yvalue) / (Ymax - Ymin)));
+          ypos := ypos + vtop - strhi div 2;
+          BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+          xpos := hleft;
+          ypos := ypos + strhi div 2;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          xpos := hleft - 10;
+          BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+     end;
+
+     // draw points for x and y pairs
+     for i := 0 to N-1 do
+     begin
+          ypos := round(vhi * ( (Ymax - Ypoints[i]) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := round(hwide * ( (Xpoints[i] - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.Brush.Color := clYellow;
+          BlankFrm.Image1.Canvas.Brush.Style := bsSolid;
+          BlankFrm.Image1.Canvas.Pen.Color := clNavy;
+          BlankFrm.Image1.Canvas.Ellipse(xpos,ypos,xpos+5,ypos+5);
+          if ((PlotNo = 2) and (i = 0)) then
+          begin
+               BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+               BlankFrm.Image1.Canvas.TextOut(xpos,ypos,'M1');
+          end;
+          if ((PlotNo = 2) and (i > 0)) then
+          begin
+               BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+               Title := format('M%d',[i+1]);
+               BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+          end;
+     end;
+     if ((PlotNo = 2) and (i > 0)) then
+     begin // draw slope line
+          BlankFrm.Image1.Canvas.Pen.Color := clRed;
+          ypos := round(vhi * ( (Ymax - Ypoints[0]) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := round(hwide * ( (Xpoints[0] - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          YL := Ypoints[0];
+          XL := xpoints[0];
+          ypos := round(vhi * ( (Ymax - Ypoints[2]) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := round(hwide * ( (Xpoints[2] - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+          YU := Ypoints[2];
+          XU := xpoints[2];
+          slope := (YU - YL) / (XU - XL);
+          ypos := vbottom + 20;
+          BlankFrm.Image1.Canvas.Brush.Color := clYellow;
+          Title := format('Slope = %.2f',[Slope]);
+          xpos := hleft + (hwide div 2) - (BlankFrm.Image1.Canvas.TextWidth(Title) div 2);
+          ypos := ypos + 15;
+          BlankFrm.Image1.Canvas.TextOut(xpos,ypos,Title);
+     end;
+
+     // draw confidence bands if requested
+     if ConfBand <> 0.0 then
+     begin
+          BlankFrm.Image1.Canvas.Pen.Color := clRed;
+          ypos := round(vhi * ((Ymax - UpConf[1]) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := round(hwide * ( (Xpoints[0] - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          for i := 2 to N do
+          begin
+               ypos := round(vhi * ((Ymax - UpConf[i]) / (Ymax - Ymin)));
+               ypos := ypos + vtop;
+               xpos := round(hwide * ( (Xpoints[i-1] - Xmin) / (Xmax - Xmin)));
+               xpos := xpos + hleft;
+               BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+          end;
+          ypos := round(vhi * ((Ymax - lowConf[1]) / (Ymax - Ymin)));
+          ypos := ypos + vtop;
+          xpos := round(hwide * ( (Xpoints[0] - Xmin) / (Xmax - Xmin)));
+          xpos := xpos + hleft;
+          BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+          for i := 2 to N do
+          begin
+               ypos := round(vhi * ((Ymax - lowConf[i]) / (Ymax - Ymin)));
+               ypos := ypos + vtop;
+               xpos := round(hwide * ( (Xpoints[i-1] - Xmin) / (Xmax - Xmin)));
+               xpos := xpos + hleft;
+               BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+          end;
+     end;
+     BlankFrm.ShowModal;
+end;
+
+procedure TResistanceLineForm.UpdateBtnStates;
+begin
+  XInBtn.Enabled := (VarList.ItemIndex > -1) and (XEdit.Text = '');
+  YInBtn.Enabled := (VarList.ItemIndex > -1) and (YEdit.Text = '');
+  XOutBtn.Enabled := (XEdit.Text <> '');
+  YOutBtn.Enabled := (YEdit.Text <> '');
+end;
+
+procedure TResistanceLineForm.VarListSelectionChange(Sender: TObject;
+  User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+initialization
+  {$I resistancelineunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/rot3dunit.lfm

@@ -0,0 +1,416 @@
+object Rot3DFrm: TRot3DFrm
+  Left = 358
+  Height = 527
+  Top = 153
+  Width = 710
+  Caption = 'Three Dimension Rotation'
+  ClientHeight = 527
+  ClientWidth = 710
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnDestroy = FormDestroy
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = VarList
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Owner
+    Left = 561
+    Height = 15
+    Top = 8
+    Width = 102
+    BorderSpacing.Top = 8
+    Caption = 'Click the X, Y and Z'
+    ParentColor = False
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = VarList
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    Left = 564
+    Height = 15
+    Top = 23
+    Width = 97
+    Caption = 'Variables to Rotate'
+    ParentColor = False
+  end
+  object Label3: TLabel
+    AnchorSideLeft.Control = XScroll
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideBottom.Control = Label6
+    Left = 530
+    Height = 15
+    Top = 188
+    Width = 7
+    Anchors = [akLeft, akBottom]
+    Caption = 'X'
+    ParentColor = False
+  end
+  object Label4: TLabel
+    AnchorSideLeft.Control = YScroll
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideBottom.Control = Label7
+    Left = 609
+    Height = 15
+    Top = 188
+    Width = 7
+    Anchors = [akLeft, akBottom]
+    Caption = 'Y'
+    ParentColor = False
+  end
+  object Label5: TLabel
+    AnchorSideLeft.Control = ZScroll
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideBottom.Control = Label8
+    Left = 689
+    Height = 15
+    Top = 188
+    Width = 7
+    Anchors = [akLeft, akBottom]
+    Caption = 'Z'
+    ParentColor = False
+  end
+  object Label6: TLabel
+    AnchorSideLeft.Control = XScroll
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideBottom.Control = XScroll
+    Left = 525
+    Height = 15
+    Top = 203
+    Width = 17
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 4
+    Caption = '-90'
+    ParentColor = False
+  end
+  object Label7: TLabel
+    AnchorSideLeft.Control = YScroll
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideBottom.Control = YScroll
+    Left = 604
+    Height = 15
+    Top = 203
+    Width = 17
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 4
+    Caption = '-90'
+    ParentColor = False
+  end
+  object Label8: TLabel
+    AnchorSideLeft.Control = ZScroll
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideBottom.Control = ZScroll
+    Left = 684
+    Height = 15
+    Top = 203
+    Width = 17
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 4
+    Caption = '-90'
+    ParentColor = False
+  end
+  object Label9: TLabel
+    AnchorSideLeft.Control = XScroll
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Label10
+    Left = 527
+    Height = 15
+    Top = 417
+    Width = 12
+    Caption = '90'
+    ParentColor = False
+  end
+  object Label10: TLabel
+    AnchorSideLeft.Control = YScroll
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = YScroll
+    AnchorSideTop.Side = asrBottom
+    AnchorSideBottom.Control = Label12
+    Left = 606
+    Height = 15
+    Top = 417
+    Width = 12
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Top = 4
+    Caption = '90'
+    ParentColor = False
+  end
+  object Label11: TLabel
+    AnchorSideLeft.Control = ZScroll
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Label10
+    Left = 686
+    Height = 15
+    Top = 417
+    Width = 12
+    Caption = '90'
+    ParentColor = False
+  end
+  object Label12: TLabel
+    AnchorSideLeft.Control = YScroll
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Label10
+    AnchorSideTop.Side = asrBottom
+    AnchorSideBottom.Control = YDegEdit
+    Left = 591
+    Height = 15
+    Top = 432
+    Width = 42
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 16
+    Caption = 'Degrees'
+    ParentColor = False
+  end
+  object Label13: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = XEdit
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 499
+    Width = 7
+    BorderSpacing.Left = 8
+    Caption = 'X'
+    ParentColor = False
+  end
+  object Label14: TLabel
+    AnchorSideLeft.Control = XEdit
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = YEdit
+    AnchorSideTop.Side = asrCenter
+    Left = 104
+    Height = 15
+    Top = 499
+    Width = 7
+    BorderSpacing.Left = 24
+    Caption = 'Y'
+    ParentColor = False
+  end
+  object Label15: TLabel
+    AnchorSideLeft.Control = YEdit
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = ZEdit
+    AnchorSideTop.Side = asrCenter
+    Left = 200
+    Height = 15
+    Top = 499
+    Width = 7
+    BorderSpacing.Left = 24
+    Caption = 'Z'
+    ParentColor = False
+  end
+  object Image1: TImage
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = VarList
+    AnchorSideBottom.Control = CloseBtn
+    Left = 8
+    Height = 478
+    Top = 8
+    Width = 506
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+  end
+  object VarList: TListBox
+    AnchorSideTop.Control = Label2
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Label4
+    Left = 522
+    Height = 140
+    Top = 40
+    Width = 180
+    Anchors = [akTop, akRight, akBottom]
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    ItemHeight = 0
+    OnClick = VarListClick
+    TabOrder = 0
+  end
+  object XScroll: TScrollBar
+    AnchorSideLeft.Control = VarList
+    AnchorSideBottom.Control = YScroll
+    AnchorSideBottom.Side = asrBottom
+    Left = 522
+    Height = 191
+    Top = 222
+    Width = 22
+    Anchors = [akLeft, akBottom]
+    Kind = sbVertical
+    PageSize = 0
+    TabOrder = 1
+    OnScroll = XScrollScroll
+  end
+  object YScroll: TScrollBar
+    AnchorSideLeft.Control = VarList
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideBottom.Control = Label10
+    Left = 601
+    Height = 191
+    Top = 222
+    Width = 22
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 4
+    Kind = sbVertical
+    PageSize = 0
+    TabOrder = 2
+    OnScroll = YScrollScroll
+  end
+  object ZScroll: TScrollBar
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = YScroll
+    AnchorSideBottom.Side = asrBottom
+    Left = 683
+    Height = 191
+    Top = 222
+    Width = 19
+    Anchors = [akRight, akBottom]
+    BorderSpacing.Right = 8
+    Kind = sbVertical
+    PageSize = 0
+    TabOrder = 3
+    OnScroll = ZScrollScroll
+  end
+  object XDegEdit: TEdit
+    AnchorSideLeft.Control = XScroll
+    AnchorSideTop.Control = YDegEdit
+    AnchorSideBottom.Control = CloseBtn
+    Left = 522
+    Height = 23
+    Top = 463
+    Width = 35
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 8
+    TabOrder = 4
+    Text = 'XDegEdit'
+  end
+  object YDegEdit: TEdit
+    AnchorSideLeft.Control = YScroll
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = XDegEdit
+    Left = 595
+    Height = 23
+    Top = 463
+    Width = 35
+    TabOrder = 5
+    Text = 'XDegEdit'
+  end
+  object ZDegEdit: TEdit
+    AnchorSideTop.Control = XDegEdit
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 667
+    Height = 23
+    Top = 463
+    Width = 35
+    Anchors = [akTop, akRight]
+    BorderSpacing.Right = 8
+    TabOrder = 6
+    Text = 'XDegEdit'
+  end
+  object XEdit: TEdit
+    AnchorSideLeft.Control = Label13
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = CloseBtn
+    AnchorSideTop.Side = asrCenter
+    Left = 23
+    Height = 23
+    Top = 495
+    Width = 57
+    BorderSpacing.Left = 8
+    TabOrder = 7
+    Text = 'XEdit'
+  end
+  object YEdit: TEdit
+    AnchorSideLeft.Control = Label14
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = CloseBtn
+    AnchorSideTop.Side = asrCenter
+    Left = 119
+    Height = 23
+    Top = 495
+    Width = 57
+    BorderSpacing.Left = 8
+    TabOrder = 8
+    Text = 'YEdit'
+  end
+  object ZEdit: TEdit
+    AnchorSideLeft.Control = Label15
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = CloseBtn
+    AnchorSideTop.Side = asrCenter
+    Left = 215
+    Height = 23
+    Top = 495
+    Width = 56
+    BorderSpacing.Left = 8
+    TabOrder = 9
+    Text = 'ZEdit'
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = PrintBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 526
+    Height = 25
+    Top = 494
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 10
+  end
+  object PrintBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 588
+    Height = 25
+    Top = 494
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Print'
+    OnClick = PrintBtnClick
+    TabOrder = 11
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 647
+    Height = 25
+    Top = 494
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 12
+  end
+  object PrintDialog: TPrintDialog
+    left = 320
+    top = 304
+  end
+  object PrinterSetupDialog1: TPrinterSetupDialog
+    left = 184
+    top = 304
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/rot3dunit.pas

@@ -0,0 +1,592 @@
+unit Rot3dUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls, Printers, PrintersDlgs,
+  MainUnit, Globals, DataProcs;
+
+
+type
+
+  { TRot3DFrm }
+
+  TRot3DFrm = class(TForm)
+    Image1: TImage;
+    PrintDialog: TPrintDialog;
+    PrinterSetupDialog1: TPrinterSetupDialog;
+    ResetBtn: TButton;
+    PrintBtn: TButton;
+    CloseBtn: TButton;
+    ZEdit: TEdit;
+    Label15: TLabel;
+    YEdit: TEdit;
+    Label14: TLabel;
+    XEdit: TEdit;
+    Label13: TLabel;
+    XDegEdit: TEdit;
+    Label1: TLabel;
+    Label10: TLabel;
+    Label11: TLabel;
+    Label12: TLabel;
+    Label2: TLabel;
+    Label3: TLabel;
+    Label4: TLabel;
+    Label5: TLabel;
+    Label6: TLabel;
+    Label7: TLabel;
+    Label8: TLabel;
+    Label9: TLabel;
+    XScroll: TScrollBar;
+    YScroll: TScrollBar;
+    ZScroll: TScrollBar;
+    VarList: TListBox;
+    YDegEdit: TEdit;
+    ZDegEdit: TEdit;
+    procedure CancelBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormDestroy(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure PrintBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListClick(Sender: TObject);
+    procedure XScrollScroll(Sender: TObject; ScrollCode: TScrollCode;
+      var ScrollPos: Integer);
+    procedure YScrollScroll(Sender: TObject; ScrollCode: TScrollCode;
+      var ScrollPos: Integer);
+    procedure ZScrollScroll(Sender: TObject; ScrollCode: TScrollCode;
+      var ScrollPos: Integer);
+  private
+    { private declarations }
+    DXmax, DXmin, DYmax, DYmin : integer;
+    WXleft, WXright, WYtop, WYbottom, RX, RY, RZ : double;
+    SINRX, COSRX, SINRY, COSRY, SINRZ, COSRZ : double;
+    GridColX, GridColY, GridColZ : integer;
+    degX, degY, degZ : double;
+    XScaled : DblDyneVec;
+    YScaled : DblDyneVec;
+    ZScaled : DblDyneVec;
+
+    procedure Rotate(Sender: TObject);
+    function DegToRad(deg : double; Sender: TObject) : double;
+    function World3DToWorld2D(p : POINT3D; Sender: TObject) : POINT3D;
+    function World2DToDevice(p :POINT3D; Sender: TObject) : POINTint;
+    procedure DrawPoint( p1 : POINT3D; Sender: TObject);
+    procedure DrawLine(p1, p2 : POINT3D; Sender: TObject);
+    procedure DrawAxis(Sender: TObject);
+    procedure SetAxesAngles(rx1, ry1, rz1 : double; Sender: TObject);
+    procedure ScaleValues(Sender: TObject);
+    procedure EraseAxis(Sender: TObject);
+
+  public
+    { public declarations }
+  end; 
+
+var
+  Rot3DFrm: TRot3DFrm;
+
+implementation
+
+uses
+  Math;
+
+{ TRot3DFrm }
+
+procedure TRot3DFrm.ResetBtnClick(Sender: TObject);
+var i : integer;
+begin
+    VarList.Items.Clear;
+    for i := 1 to NoVariables do
+        VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+    XScroll.Position := 0;
+    YScroll.Position := 0;
+    ZScroll.Position := 0;
+    // set device limits
+    DXmin := 36;
+    DXmax := 436;
+    DYmin := 36;
+    DYmax := 436;
+    // set world limits
+    WXleft := -1.0;
+    WYbottom := -1.0;
+    WXright := 1.0;
+    WYtop := 1.0;
+    XDegEdit.Text := '0';
+    YDegEdit.Text := '0';
+    ZDegEdit.Text := '0';
+    XEdit.Text := '';
+    YEdit.Text := '';
+    ZEdit.Text := '';
+end;
+
+procedure TRot3DFrm.VarListClick(Sender: TObject);
+var
+   i, index : integer;
+   Xvar, Yvar, Zvar : string;
+
+begin
+    index := VarList.ItemIndex;
+    if XEdit.Text = '' then
+    begin
+        XEdit.Text := VarList.Items.Strings[index];
+        exit;
+    end;
+    if YEdit.Text = '' then
+    begin
+        YEdit.Text := VarList.Items.Strings[index];
+        exit;
+    end;
+    ZEdit.Text := VarList.Items.Strings[index];
+    // Get column no.s of selected variables
+    Xvar := XEdit.Text;
+    Yvar := YEdit.Text;
+    Zvar := ZEdit.Text;
+    for i := 1 to NoVariables do
+    begin
+        if Xvar = OS3MainFrm.DataGrid.Cells[i,0] then GridColX := i;
+        if Yvar = OS3MainFrm.DataGrid.Cells[i,0] then GridColY := i;
+        if Zvar = OS3MainFrm.DataGrid.Cells[i,0] then GridColZ := i;
+    end;
+    ScaleValues(self); // get scaled X, y and Z values (-1.0 to 1.0)
+    XScroll.Position := 20;
+    YScroll.Position := -15;
+    ZScroll.Position := -5;
+    Canvas.Pen.Color := clBlack;
+    Rotate(self);
+end;
+
+procedure TRot3DFrm.XScrollScroll(Sender: TObject; ScrollCode: TScrollCode;
+  var ScrollPos: Integer);
+begin
+  Rotate(self);
+end;
+
+procedure TRot3DFrm.YScrollScroll(Sender: TObject; ScrollCode: TScrollCode;
+  var ScrollPos: Integer);
+begin
+  Rotate(self);
+end;
+
+procedure TRot3DFrm.ZScrollScroll(Sender: TObject; ScrollCode: TScrollCode;
+  var ScrollPos: Integer);
+begin
+  Rotate(self);
+end;
+
+procedure TRot3DFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TRot3DFrm.PrintBtnClick(Sender: TObject);
+var
+   labelstr : string;
+   p1, p2, p, pa, pb : POINT3D;
+   p11, p22 : POINTint;
+   i, t, X : integer;
+   offset, Clwidth, Clheight : double;
+
+begin
+  if not PrintDialog.Execute then
+    exit;
+
+  labelstr := '3D PLOT';
+  Clwidth :=  Printer.PageWidth;
+  Clheight := Clwidth;
+  offset := Clwidth / 20.0;
+
+  Clwidth := Clwidth - (Clwidth / 20.0);
+  Printer.BeginDoc;
+  try
+    // First, draw axis
+    p1.x := -1;
+    p1.y := 0;
+    p1.z := 0;
+    p2.x := 1;
+    p2.y := 0;
+    p2.z := 0;
+    Printer.Canvas.Pen.Color := clRed;
+
+    //draw a 3d line
+    p1.z := -p1.z;
+    p2.z := -p2.z;
+    pa := World3DToWorld2D(p1,self);
+    pb := World3DToWorld2D(p2,self);
+
+    // scale it up
+    p11.x := round((WXleft-pa.x)*(Clwidth-offset) / (WXleft - WXright)+ offset + 0.5);
+    p11.y := round((WYtop-pa.y)*(Clheight-offset) / (WYtop-WYbottom) + offset + 0.5);
+    p22.x := round((WXleft-pb.x)*(Clwidth-offset) / (WXleft - WXright) + offset + 0.5);
+    p22.y := round((WYtop-pb.y)*(Clheight-offset) / (WYtop-WYbottom) + offset + 0.5);
+    Printer.Canvas.MoveTo(p11.x,p11.y);
+    Printer.Canvas.LineTo(p22.x,p22.y);
+    p1.x := 0;
+    p1.y := -1;
+    p2.x := 0;
+    p2.y := 1;
+    p2.z := 0;
+    Printer.Canvas.Pen.Color := clBlue;
+
+    //draw a 3d line
+    p1.z := -p1.z;
+    p2.z := -p2.z;
+    pa := World3DToWorld2D(p1,self);
+    pb := World3DToWorld2D(p2,self);
+
+    // scale it up
+    p11.x := round((WXleft-pa.x)*(Clwidth-offset) / (WXleft - WXright)+ offset + 0.5);
+    p11.y := round((WYtop-pa.y)*(Clheight-offset) / (WYtop-WYbottom) + offset + 0.5);
+    p22.x := round((WXleft-pb.x)*(Clwidth-offset) / (WXleft - WXright) + offset + 0.5);
+    p22.y := round((WYtop-pb.y)*(Clheight-offset) / (WYtop-WYbottom) + offset + 0.5);
+    Printer.Canvas.MoveTo(p11.x,p11.y);
+    Printer.Canvas.LineTo(p22.x,p22.y);
+    p1.y := 0;
+    p1.z := -1;
+    p2.x := 0;
+    p2.y := 0;
+    p2.z := 1;
+    Printer.Canvas.Pen.Color := clGreen;
+
+    //draw a 3d line
+    p1.z := -p1.z;
+    p2.z := -p2.z;
+    pa := World3DToWorld2D(p1,self);
+    pb := World3DToWorld2D(p2,self);
+
+    // scale it up
+    p11.x := round((WXleft-pa.x)*(Clwidth-offset) / (WXleft - WXright)+ offset + 0.5);
+    p11.y := round((WYtop-pa.y)*(Clheight-offset) / (WYtop-WYbottom) + offset + 0.5);
+    p22.x := round((WXleft-pb.x)*(Clwidth-offset) / (WXleft - WXright) + offset + 0.5);
+    p22.y := round((WYtop-pb.y)*(Clheight-offset) / (WYtop-WYbottom) + offset + 0.5);
+    Printer.Canvas.MoveTo(p11.x,p11.y);
+    Printer.Canvas.LineTo(p22.x,p22.y);
+    Printer.Canvas.Pen.Color := clBlack;
+
+    //Now, plot points
+    for i := 1 to NoCases do
+    begin
+        p.x := XScaled[i];
+        p.y := YScaled[i];
+        p.z := ZScaled[i];
+        // draws a 3d point
+        p.z := -p.z;
+        pa := World3DToWorld2D(p,self);
+        // scale it up
+        p11.x := round((WXleft-pa.x)*(Clwidth-offset) / (WXleft - WXright) + offset + 0.5);
+        p11.y := round((WYtop-pa.y)*(Clheight-offset) / (WYtop-WYbottom) + offset + 0.5);
+        Printer.Canvas.Rectangle(p11.x - 4,p11.y - 4,p11.x + 4, p11.y + 4);
+    end;
+
+    // Print Heading
+    t := Printer.Canvas.TextWidth(labelstr);
+    X := round((Clwidth / 2.0) - (t / 2.0));
+    Printer.Canvas.TextOut(X,0,labelstr);
+    labelstr := 'RED := X, BLUE := Y, GREEN := Z';
+    t := Printer.Canvas.TextWidth(labelstr);
+    X := round((Clwidth / 2.0) - (t / 2.0));
+    Printer.Canvas.TextOut(X,round(Clheight),labelstr);
+    labelstr := XEdit.Text;
+    labelstr := labelstr + '  ';
+    labelstr := labelstr + YEdit.Text;
+    labelstr := labelstr + '  ';
+    labelstr := labelstr + ZEdit.Text;
+    t := Printer.Canvas.TextWidth(labelstr);
+    X := round((Clwidth / 2.0) - (t / 2.0));
+    Printer.Canvas.TextOut(X,round(Clheight+40.0),labelstr);
+    labelstr := 'ROTATION: X deg. := ';
+    labelstr := labelstr + XDegEdit.Text;
+    labelstr := labelstr + '  Y deg. := ';
+    labelstr := labelstr + YDegEdit.Text;
+    labelstr := labelstr + '  Z deg. := ';
+    labelstr := labelstr + ZDegEdit.Text;
+    t := Printer.Canvas.TextWidth(labelstr);
+    X := round((Clwidth / 2.0) - (t / 2));
+    Printer.Canvas.TextOut(X,round(Clheight+80.0),labelstr);
+
+  finally
+    Printer.EndDoc;    // finish printing
+  end;
+end;
+
+procedure TRot3DFrm.CancelBtnClick(Sender: TObject);
+begin
+     ZScaled := nil;
+     YScaled := nil;
+     XScaled := nil;
+     Close;
+end;
+
+procedure TRot3DFrm.Rotate(Sender: TObject);
+var
+  p: POINT3D;
+  i: integer;
+begin
+  Image1.Canvas.Brush.Style := bsSolid;
+  Image1.Canvas.Brush.Color := clLtGray;
+  Image1.Canvas.FillRect(0, 0, Image1.Width, Image1.Height);
+
+  Image1.Canvas.Brush.Color := clWhite;
+  Image1.Canvas.Pen.Color := clBlack;
+  Image1.Canvas.Rectangle(20,20,460,460);
+
+  //First, erase current points
+  Image1.Canvas.Pen.Color := clWhite;
+  Image1.Canvas.Brush.Color := clWhite;
+  for i := 1 to NoCases do
+  begin
+    p.x := XScaled[i];
+    p.y := YScaled[i];
+    p.z := ZScaled[i];
+    DrawPoint(p,self);
+  end;
+  EraseAxis(self);
+  Image1.Canvas.Brush.Color := clBlack;
+  Image1.Canvas.Pen.Color := clBlack;
+  degX := XScroll.Position;
+  degY := YScroll.Position;
+  degZ := ZScroll.Position;
+  XDegEdit.Text := IntToStr(XScroll.Position);
+  YDegEdit.Text := IntToStr(YScroll.Position);
+  ZDegEdit.Text := IntToStr(ZScroll.Position);
+  SetAxesAngles(degX, degY, degZ,self);
+  DrawAxis(self);
+  for i := 1 to NoCases do
+  begin
+    p.x := XScaled[i];
+    p.y := YScaled[i];
+    p.z := ZScaled[i];
+    DrawPoint(p,self);
+  end;
+end;
+//---------------------------------------------------------------------------
+
+function TRot3DFrm.DegToRad(deg : double; Sender: TObject) : double;
+begin
+  Result :=  deg * PI / 180.0;
+end;
+//---------------------------------------------------------------------------
+
+function TRot3DFrm.World3DToWorld2D(p : POINT3D; Sender: TObject) : POINT3D;
+var
+   ptemp : POINT3D;
+begin
+    ptemp := p;
+    if RX <> 0.0 then begin
+        ptemp.x := p.x;
+        ptemp.y := COSRX * p.y - SINRX * p.z;
+        ptemp.z := SINRX * p.y + COSRX * p.z;
+        p := ptemp;
+    end;
+    if RY <> 0.0 then begin
+        ptemp.x := COSRY * p.x + SINRY * p.z;
+        ptemp.y := p.y;
+        ptemp.z := SINRY * p.x + COSRY * p.z;
+        p := ptemp;
+    end;
+    if RZ <> 0.0 then begin
+        ptemp.x := COSRZ * p.x - SINRZ * p.y;
+        ptemp.y := SINRZ * p.x + COSRZ * p.y;
+        ptemp.z := p.z;
+    end;
+    if abs(ptemp.x) < TOL then ptemp.x := 0.0;
+    if abs(ptemp.y) < TOL then ptemp.y := 0.0;
+    if abs(ptemp.z) < TOL then ptemp.z := 0.0;
+    Result := ptemp;
+end;
+//---------------------------------------------------------------------------
+
+function TRot3DFrm.World2DToDevice(p :POINT3D; Sender: TObject) : POINTint;
+var
+   ptemp : POINTint;
+begin
+    ptemp.x := round((WXleft - p.x) * (DXmax - DXmin) / (WXleft - WXright) + DXmin + 0.5);
+    ptemp.y := round((WYtop -  p.y) * (DYmax - DYmin) / (WYtop - WYbottom) + DYmin + 0.5);
+    Result := ptemp;
+end;
+//---------------------------------------------------------------------------
+
+procedure TRot3DFrm.DrawPoint( p1 : POINT3D; Sender: TObject);
+var
+   p2 : POINTint;
+begin
+    // draws a 3d point
+    p1.z := -p1.z;
+    p2 := World2DToDevice(World3DToWorld2D(p1,self),self);
+    Image1.Canvas.Rectangle(p2.x - 2,p2.y - 2,p2.x + 2, p2.y + 2);
+end;
+//---------------------------------------------------------------------------
+
+procedure TRot3DFrm.DrawLine(p1, p2 : POINT3D; Sender: TObject);
+var
+   p11, p22 : POINTint;
+begin
+    //draws a 3d line
+    p1.z := -p1.z;
+    p2.z := -p2.z;
+    p11 := World2DToDevice(World3DToWorld2D(p1,self),self);
+    p22 := World2DToDevice(World3DToWorld2D(p2,self),self);
+    Image1.Canvas.MoveTo(p11.x,p11.y);
+    Image1.Canvas.LineTo(p22.x,p22.y);
+end;
+//---------------------------------------------------------------------------
+
+procedure TRot3DFrm.DrawAxis(Sender: TObject);
+var
+   p1, p2 : POINT3D;
+begin
+    p1.x := -1;
+    p1.y := 0;
+    p1.z := 0;
+    p2.x := 1;
+    p2.y := 0;
+    p2.z := 0;
+    Image1.Canvas.Pen.Color := clRed;
+    drawline(p1,p2,self);
+    p1.x := 0;
+    p1.y := -1;
+    p2.x := 0;
+    p2.y := 1;
+    p2.z := 0;
+    Image1.Canvas.Pen.Color := clBlue;
+    drawline(p1,p2,self);
+    p1.y := 0;
+    p1.z := -1;
+    p2.x := 0;
+    p2.y := 0;
+    p2.z := 1;
+    Image1.Canvas.Pen.Color := clGreen;
+    drawline(p1,p2,self);
+    Image1.Canvas.Pen.Color := clWhite;
+end;
+//---------------------------------------------------------------------------
+
+procedure TRot3DFrm.SetAxesAngles(rx1, ry1, rz1 : double; Sender: TObject);
+begin
+    RX := DegToRad(rx1,self);
+    RY := DegToRad(ry1,self);
+    RZ := DegToRad(rz1,self);
+    COSRX := cos(RX);
+    SINRX := sin(RX);
+    COSRY := cos(RY);
+    SINRY := sin(RY);
+    COSRZ := cos(RZ);
+    SINRZ := sin(RZ);
+end;
+//---------------------------------------------------------------------------
+
+procedure TRot3DFrm.ScaleValues(Sender: TObject);
+var
+    Xmax, Ymax, Zmax, Xmin, Ymin, Zmin, value, prop : double;
+    i, NoSelected : integer;
+    ColNoSelected : IntDyneVec;
+
+begin
+    // This routine scales the X, Y and Z values in the grid to new
+    // values ranging from -1 to 1 for each.  The arrays of scaled
+    // values are pointed to by the private float pointers XScaled,
+    // YScaled and ZScaled;
+
+    SetLength(ColNoSelected,NoVariables);
+    SetLength(XScaled,NoCases+1);
+    SetLength(YScaled,NoCases+1);
+    SetLength(ZScaled,NoCases+1);
+
+    ColNoSelected[0] := GridColX;
+    ColNoSelected[1] := GridColY;
+    ColNoSelected[2] := GridColZ;
+    NoSelected := 3;
+    Xmax := StrToFloat(OS3MainFrm.DataGrid.Cells[GridColX,1]);
+    Xmin := Xmax;
+    Ymin := StrToFloat(OS3MainFrm.DataGrid.Cells[GridColY,1]);
+    Ymax := Ymin;
+    Zmax := StrToFloat(OS3MainFrm.DataGrid.Cells[GridColZ,1]);
+    Zmin := Zmax;
+    for i := 1 to NoCases do
+    begin
+        if Not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        value := StrToFloat(OS3MainFrm.DataGrid.Cells[GridColX,i]);
+        if (value > Xmax) then Xmax := value;
+        if (value < Xmin) then Xmin := value;
+        value := StrToFloat(OS3MainFrm.DataGrid.Cells[GridColY,i]);
+        if (value > Ymax) then Ymax := value;
+        if (value < Ymin) then Ymin := value;
+        value := StrToFloat(OS3MainFrm.DataGrid.Cells[GridColZ,i]);
+        if (value > Zmax) then Zmax := value;
+        if (value < Zmin) then Zmin := value;
+    end;
+    // now scale values
+    for i := 1 to NoCases do
+    begin
+        if Not GoodRecord(i,NoSelected,ColNoSelected) then continue;
+        value := StrTofloat(OS3MainFrm.DataGrid.Cells[GridColX,i]);
+        prop := (Xmax - value) / (Xmax - Xmin);
+        XScaled[i] := prop - 0.5;  //scale between -1 and +1
+        value := StrToFloat(OS3MainFrm.DataGrid.Cells[GridColY,i]);
+        prop := (Ymax - value) / (Ymax - Ymin);
+        YScaled[i] := prop - 0.5;
+        value := StrToFloat(OS3MainFrm.DataGrid.Cells[GridColZ,i]);
+        prop := (Zmax - value) / (Zmax - Zmin);
+        ZScaled[i] := prop - 0.5;
+    end;
+    ColNoSelected := nil;
+end;
+//-------------------------------------------------------------------
+
+procedure TRot3DFrm.EraseAxis(Sender: TObject);
+var
+   p1, p2 : POINT3D;
+begin
+    p1.x := -1;
+    p1.y := 0;
+    p1.z := 0;
+    p2.x := 1;
+    p2.y := 0;
+    p2.z := 0;
+    Image1.Canvas.Pen.Color := clWhite;
+    drawline(p1,p2,self);
+    p1.x := 0;
+    p1.y := -1;
+    p2.x := 0;
+    p2.y := 1;
+    p2.z := 0;
+    drawline(p1,p2,self);
+    p1.y := 0;
+    p1.z := -1;
+    p2.x := 0;
+    p2.y := 0;
+    p2.z := 1;
+    drawline(p1,p2,self);
+end;
+
+procedure TRot3DFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  w := MaxValue([ResetBtn.Width, PrintBtn.Width, CloseBtn.Width]);
+  ResetBtn.Constraints.MinWidth := w;
+  PrintBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+end;
+
+procedure TRot3DFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+end;
+
+procedure TRot3DFrm.FormDestroy(Sender: TObject);
+begin
+  ZScaled := nil;
+  YScaled := nil;
+  XScaled := nil;
+end;
+
+
+initialization
+  {$I rot3dunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/smoothdataunit.lfm

@@ -0,0 +1,215 @@
+object DataSmoothingForm: TDataSmoothingForm
+  Left = 554
+  Height = 388
+  Top = 284
+  Width = 372
+  AutoSize = True
+  Caption = 'Smooth Data'
+  ClientHeight = 388
+  ClientWidth = 372
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = ResetBtnClick
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Memo1
+    AnchorSideTop.Side = asrBottom
+    Left = 8
+    Height = 15
+    Top = 80
+    Width = 49
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 12
+    Caption = 'Variables:'
+    ParentColor = False
+  end
+  object VarList: TListBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Label1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = VarInBtn
+    AnchorSideBottom.Control = RepeatChk
+    Left = 8
+    Height = 211
+    Top = 97
+    Width = 184
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 2
+    BorderSpacing.Right = 8
+    Constraints.MinHeight = 200
+    ItemHeight = 0
+    OnSelectionChange = VarListSelectionChange
+    TabOrder = 0
+  end
+  object VarInBtn: TBitBtn
+    AnchorSideTop.Control = VarList
+    AnchorSideRight.Control = SelectedEdit
+    Left = 200
+    Height = 28
+    Top = 97
+    Width = 28
+    Anchors = [akTop, akRight]
+    BorderSpacing.Right = 8
+    Images = MainDataModule.ImageList
+    ImageIndex = 1
+    OnClick = VarInBtnClick
+    Spacing = 0
+    TabOrder = 1
+  end
+  object VarOutBtn: TBitBtn
+    AnchorSideLeft.Control = VarInBtn
+    AnchorSideTop.Control = VarInBtn
+    AnchorSideTop.Side = asrBottom
+    Left = 200
+    Height = 28
+    Top = 129
+    Width = 28
+    BorderSpacing.Top = 4
+    Images = MainDataModule.ImageList
+    ImageIndex = 0
+    OnClick = VarOutBtnClick
+    Spacing = 0
+    TabOrder = 2
+  end
+  object Label2: TLabel
+    AnchorSideLeft.Control = SelectedEdit
+    AnchorSideBottom.Control = SelectedEdit
+    Left = 236
+    Height = 15
+    Top = 105
+    Width = 47
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Bottom = 2
+    Caption = 'Selected:'
+    ParentColor = False
+  end
+  object SelectedEdit: TEdit
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = VarOutBtn
+    AnchorSideBottom.Side = asrBottom
+    Left = 236
+    Height = 23
+    Top = 122
+    Width = 128
+    Anchors = [akRight, akBottom]
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 12
+    ReadOnly = True
+    TabOrder = 3
+    Text = 'SelectedEdit'
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 158
+    Height = 25
+    Top = 355
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Right = 9
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 4
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 221
+    Height = 25
+    Top = 355
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 5
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 305
+    Height = 25
+    Top = 355
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 6
+  end
+  object RepeatChk: TCheckBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = RepeatEdit
+    AnchorSideTop.Side = asrCenter
+    AnchorSideBottom.Control = Bevel1
+    Left = 8
+    Height = 19
+    Top = 316
+    Width = 188
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Bottom = 4
+    Caption = 'Repeat Smoothing No. Times = '
+    TabOrder = 7
+  end
+  object RepeatEdit: TEdit
+    AnchorSideLeft.Control = RepeatChk
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideTop.Control = RepeatChk
+    AnchorSideTop.Side = asrCenter
+    Left = 204
+    Height = 23
+    Top = 314
+    Width = 32
+    Alignment = taRightJustify
+    BorderSpacing.Left = 8
+    TabOrder = 8
+    Text = '1'
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 339
+    Width = 372
+    Anchors = [akLeft, akRight, akBottom]
+    BorderSpacing.Bottom = 8
+    Shape = bsBottomLine
+  end
+  object Memo1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 8
+    Height = 60
+    Top = 8
+    Width = 356
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'This procedure smooths data by averaging every three data points starting with the first three to the last three.  The data smoothing can be repeated multiple times. The first and last data points are unchanged.'
+    ParentColor = False
+    WordWrap = True
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/smoothdataunit.pas

@@ -0,0 +1,177 @@
+unit SmoothDataUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Buttons, ExtCtrls,
+  MainUnit, Globals, DictionaryUnit;
+
+type
+
+  { TDataSmoothingForm }
+
+  TDataSmoothingForm = class(TForm)
+    Bevel1: TBevel;
+    Memo1: TLabel;
+    RepeatEdit: TEdit;
+    RepeatChk: TCheckBox;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    CloseBtn: TButton;
+    SelectedEdit: TEdit;
+    Label2: TLabel;
+    VarInBtn: TBitBtn;
+    VarOutBtn: TBitBtn;
+    Label1: TLabel;
+    VarList: TListBox;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarInBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+    procedure VarOutBtnClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    procedure UpdateBtnStates;
+  public
+    { public declarations }
+  end; 
+
+var
+  DataSmoothingForm: TDataSmoothingForm;
+
+implementation
+
+uses
+  Math;
+
+{ TDataSmoothingForm }
+
+procedure TDataSmoothingForm.ResetBtnClick(Sender: TObject);
+var
+  i : integer;
+begin
+  VarList.Clear;
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  RepeatEdit.Text := '1';
+  SelectedEdit.Text := '';
+  UpdateBtnStates;
+end;
+
+procedure TDataSmoothingForm.ComputeBtnClick(Sender: TObject);
+var
+   DataPts, OutPts : DblDyneVec;
+   avalue, avg : double;
+   N, Reps, i, j, VarCol : integer;
+   VarLabel, strvalue : string;
+begin
+     N := NoCases;
+     SetLength(DataPts,N);
+     SetLength(OutPts,N);
+     Reps := StrToInt(RepeatEdit.Text);
+     Varlabel := SelectedEdit.Text;
+     for i := 1 to NoVariables do
+       if VarLabel = OS3MainFrm.DataGrid.Cells[i,0] then VarCol := i;
+     for i := 0 to N - 1 do
+     begin
+       avalue := StrToFloat(OS3MainFrm.DataGrid.Cells[VarCol,i+1]);
+       DataPts[i] := avalue;
+     end;
+
+     // repeat smoothing for number of times elected
+     OutPts[0] := DataPts[0];
+     OutPts[N-1] := DataPts[N-1];
+     for j := 1 to Reps do
+     begin
+       for i := 1 to N - 2 do
+       begin
+         avg := (DataPts[i-1] + DataPts[i] + DataPts[i+1]) / 3.0;
+         OutPts[i] := avg;
+       end;
+       if j < reps then
+          for i := 0 to N - 1 do DataPts[i] := OutPts[i];
+     end;
+     // create a new variable and copy smoothed data into it
+     strvalue := 'Smoothed' + VarLabel;
+     DictionaryFrm.NewVar(NoVariables+1);
+     DictionaryFrm.DictGrid.Cells[1,NoVariables] := strvalue;
+     OS3MainFrm.DataGrid.Cells[NoVariables,0] := strvalue;
+     for i := 0 to N - 1 do
+     begin
+         strvalue := format('%9.3f',[OutPts[i]]);
+         OS3MainFrm.DataGrid.Cells[NoVariables,i+1] := strvalue;
+     end;
+
+     // clean up
+     OutPts := nil;
+     DataPts := nil;
+end;
+
+procedure TDataSmoothingForm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  FAutoSized := True;
+end;
+
+procedure TDataSmoothingForm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+  if DictionaryFrm = nil then Application.CreateForm(TDictionaryFrm, DictionaryFrm);
+end;
+
+procedure TDataSmoothingForm.VarInBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if (index > -1) and (SelectedEdit.Text = '') then
+  begin
+    SelectedEdit.Text := VarList.Items.Strings[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TDataSmoothingForm.VarListSelectionChange(Sender: TObject;
+  User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+procedure TDataSmoothingForm.VarOutBtnClick(Sender: TObject);
+begin
+  if SelectedEdit.Text <>  '' then
+  begin
+    VarList.Items.Add(SelectedEdit.Text);
+    SelectedEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TDataSmoothingForm.UpdateBtnStates;
+begin
+  VarInBtn.Enabled := (VarList.ItemIndex > -1) and (SelectedEdit.Text = '');
+  VarOutBtn.Enabled := (SelectedEdit.Text <> '');
+end;
+
+
+initialization
+  {$I smoothdataunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/stemleafunit.lfm

@@ -0,0 +1,247 @@
+object StemLeafFrm: TStemLeafFrm
+  Left = 519
+  Height = 296
+  Top = 257
+  Width = 407
+  AutoSize = True
+  Caption = 'Stem and Leaf Analysis'
+  ClientHeight = 296
+  ClientWidth = 407
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object TestChk: TCheckBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = Bevel1
+    AnchorSideBottom.Side = asrBottom
+    Left = 8
+    Height = 19
+    Top = 228
+    Width = 202
+    Anchors = [akLeft, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Show All Scaled Values and Srrings'
+    TabOrder = 0
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = TestChk
+    Left = 8
+    Height = 212
+    Top = 8
+    Width = 391
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    BevelOuter = bvNone
+    ClientHeight = 212
+    ClientWidth = 391
+    Constraints.MinHeight = 200
+    TabOrder = 1
+    object Label1: TLabel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Panel1
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 100
+      Caption = 'Available Variables:'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Label1
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = AllBtn
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 195
+      Top = 17
+      Width = 167
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 0
+    end
+    object InBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = VarList
+      Left = 181
+      Height = 28
+      Top = 17
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = InBtnClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object OutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = InBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 181
+      Height = 28
+      Top = 49
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = OutBtnClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object AllBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = OutBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 175
+      Height = 25
+      Top = 101
+      Width = 40
+      AutoSize = True
+      BorderSpacing.Top = 24
+      Caption = 'All'
+      OnClick = AllBtnClick
+      TabOrder = 3
+    end
+    object Label2: TLabel
+      AnchorSideLeft.Control = SelectList
+      AnchorSideTop.Control = Panel1
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 223
+      Height = 15
+      Top = 0
+      Width = 96
+      Caption = 'Selected Variables:'
+      ParentColor = False
+    end
+    object SelectList: TListBox
+      AnchorSideLeft.Control = AllBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = Label2
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 223
+      Height = 195
+      Top = 17
+      Width = 168
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 2
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 4
+    end
+  end
+  object CloseBtn: TButton
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 340
+    Height = 25
+    Top = 263
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 2
+  end
+  object ComputeBtn: TButton
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 256
+    Height = 25
+    Top = 263
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 3
+  end
+  object ResetBtn: TButton
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 194
+    Height = 25
+    Top = 263
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 4
+  end
+  object HelpBtn: TButton
+    Tag = 148
+    AnchorSideRight.Control = ResetBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 135
+    Height = 25
+    Top = 263
+    Width = 51
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 5
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 247
+    Width = 407
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/stemleafunit.pas

@@ -0,0 +1,430 @@
+unit StemLeafUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, ExtCtrls, Buttons, Math, Clipbrd,
+  MainUnit, Globals, OutputUnit, DataProcs, ContextHelpUnit;
+
+type
+
+  { TStemLeafFrm }
+
+  TStemLeafFrm = class(TForm)
+    Bevel1: TBevel;
+    HelpBtn: TButton;
+    InBtn: TBitBtn;
+    OutBtn: TBitBtn;
+    AllBtn: TBitBtn;
+    Panel1: TPanel;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    CloseBtn: TButton;
+    TestChk: TCheckBox;
+    Label1: TLabel;
+    Label2: TLabel;
+    VarList: TListBox;
+    SelectList: TListBox;
+    procedure AllBtnClick(Sender: TObject);
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure FormShow(Sender: TObject);
+    procedure HelpBtnClick(Sender: TObject);
+    procedure InBtnClick(Sender: TObject);
+    procedure OutBtnClick(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    procedure UpdateBtnStates;
+  public
+    { public declarations }
+  end; 
+
+var
+  StemLeafFrm: TStemLeafFrm;
+
+implementation
+
+{ TStemLeafFrm }
+
+procedure TStemLeafFrm.ResetBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  VarList.Clear;
+  for i := 1 to NoVariables do
+    VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+  SelectList.Clear;
+  UpdateBtnStates;
+end;
+
+procedure TStemLeafFrm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+end;
+
+procedure TStemLeafFrm.FormShow(Sender: TObject);
+begin
+  ResetBtnClick(self);
+end;
+
+procedure TStemLeafFrm.HelpBtnClick(Sender: TObject);
+begin
+  if ContextHelpForm = nil then
+    Application.CreateForm(TContextHelpForm, ContextHelpForm);
+  ContextHelpForm.HelpMessage((Sender as TButton).Tag);
+end;
+
+procedure TStemLeafFrm.AllBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  for i := 0 to VarList.Items.Count-1 do
+    SelectList.Items.Add(VarList.Items[i]);
+  VarList.Clear;
+  UpdateBtnStates;
+end;
+
+procedure TStemLeafFrm.ComputeBtnClick(Sender: TObject);
+var
+  i, j, k, L, ncases, noselected, largest, smallest: integer;
+  minsize, maxsize, stem, minstem, maxstem, bin, index: integer;
+  leafvalue, counter, smallcount, testvalue, largestcount: integer;
+  cellstring, outline, astring: string;
+  selected: IntDyneVec;
+  bins: IntDyneVec;
+  frequency: IntDyneVec;
+  ValueString: StrDyneVec;
+  values: DblDyneVec;
+  leafcount: IntDyneMat;
+  min, max, temp, X, stemsize: double;
+  lReport: TStrings;
+begin
+  noselected := SelectList.Items.Count;
+  if (noselected = 0) then
+  begin
+     MessageDlg('No variables were selected.', mtError, [mbOK], 0);
+     exit;
+  end;
+
+  SetLength(selected,noselected);
+  SetLength(values,NoCases);
+  SetLength(bins,100);
+  SetLength(frequency,100);
+  SetLength(ValueString,NoCases);
+  SetLength(leafcount,100,10);
+
+  // Get selected variables
+  for i := 1 to noselected do
+  begin
+    cellstring := SelectList.Items.Strings[i-1];
+    for j := 1 to NoVariables do
+      if (cellstring = OS3MainFrm.DataGrid.Cells[j,0]) then selected[i-1] := j;
+  end;
+
+  lReport := TStringList.Create;
+  try
+    lReport.Add('STEM AND LEAF PLOTS');
+    lReport.Add('');
+
+    // Analyze each variable selected
+    for j := 0 to noselected - 1 do
+    begin
+      k := selected[j];
+      lReport.Add('Stem and Leaf Plot for variable: %s', [OS3MainFrm.DataGrid.Cells[k,0]]);
+      ncases := 0;
+      min := 1.0e308;
+      max := -1.0e308;
+      minsize := 1000;
+      maxsize := -1000;
+
+      // Store values of the variable
+      for i := 1 to NoCases do
+      begin
+        if not ValidValue(i,k) then continue;
+        values[ncases] := StrToFloat(OS3MainFrm.DataGrid.Cells[k,i]);
+        ValueString[ncases] := Trim(OS3MainFrm.DataGrid.Cells[k,i]);
+        if (values[ncases] < min) then min := values[ncases];
+        if (values[ncases] > max) then max := values[ncases];
+        if Length(ValueString[ncases]) > maxsize then maxsize := Length(ValueString[ncases]);
+        if Length(ValueString[ncases]) < minsize then minsize := Length(ValueString[ncases]);
+        ncases := ncases + 1;
+      end;
+
+      largest := ceil(max);
+      smallest := ceil(min);
+      stemsize := 1.0;
+      if ((largest > 0) and (largest > 10)) then
+      begin
+        while (largest > 10)do
+        begin
+          largest := largest div 10;
+          stemsize := stemsize * 10.0;
+        end;
+      end else
+      if ((largest < 0) and (smallest < -10)) then  // largest value is less than 0.0
+      begin
+        while (smallest < -10)do
+        begin
+          smallest := smallest * 10;
+          stemsize := stemsize / 10.0;
+        end;
+      end;
+
+      // rescale values by stemsize
+      for i := 0 to ncases - 1 do
+        values[i] := values[i] / stemsize;
+
+      // multiply values by 10, round and save value divided by 10
+      for i := 0 to ncases - 1 do
+      begin
+        temp := floor(values[i] * 10);
+        temp := temp / 10.0;
+        values[i] := temp;
+        astring := format('%4.1f',[values[i]]);
+        ValueString[i] := astring;
+      end;
+
+      // get max and min stem values for creating bins for stem values
+      minstem := 999;
+      maxstem := -999;
+      for i := 0 to ncases - 1 do
+      begin
+        stem := floor(values[i]);
+        if (stem < minstem) then minstem := stem;
+        if (stem > maxstem) then maxstem := stem;
+      end;
+
+      // create arrays for stem and leaf plot
+      for i := 0 to 19 do
+        frequency[i] := 0;
+
+      // sort values into ascending order
+      for i := 0 to ncases-2 do
+      begin
+        for k := i+1 to ncases - 1 do
+        begin
+          if (values[i] > values[k]) then // swap values
+          begin
+            X := values[i];
+            values[i] := values[k];
+            values[k] := X;
+            cellstring := ValueString[i];
+            ValueString[i] := ValueString[k];
+            ValueString[k] := cellstring;
+          end;
+        end;
+      end;
+(*
+         // check sizes - delete if ok
+         outline := format('maxsize, minsize,stemsize: %10d %10d %10.2f',[maxsize, minsize, stemsize]);
+         OutputFrm.RichEdit.Lines.Add(outline);
+         OutputFrm.ShowModal;
+         OutputFrm.RichEdit.Clear;
+*)
+      if TestChk.Checked then
+      begin   // test output
+        lReport.Add('value     ValueString');
+        for i := 0 to ncases - 1 do
+          lReport.Add('%10.1f %s',[values[i],ValueString[i]]);
+      end;
+
+      lReport.Add('');
+      lReport.Add('Frequency  Stem & Leaf');
+
+      // initialize leaf count for the bins
+      for i := 0 to 99 do // bins
+        for k := 0 to 9 do leafcount[i,k] := 0;  // leafs 0 to 9
+
+      // count leafs in each bin
+      for i := 0 to ncases - 1 do
+      begin
+        bin := floor(values[i]); // truncate to get stem value
+        bin := bin - minstem; // get the bin number between 0 and 100
+        if (bin < 100) and (bin >= 0) then
+        begin
+          bins[bin] := floor(values[i]);
+          frequency[bin] := frequency[bin] + 1; // count number of stem values
+        end else
+        begin
+          MessageDlg('Error in bin value', mtError, [mbOK], 0);
+          exit;
+        end;
+
+        // get leaf value
+        astring := ValueString[i];
+        index := Pos('.',astring);
+        leafvalue := StrToInt(astring[index+1]);
+        if (leafvalue < 10) and (leafvalue >= 0) then
+           leafcount[bin,leafvalue] := leafcount[bin,leafvalue] + 1
+        else
+        begin
+          MessageDlg('Error in leafvalue', mtError, [mbOK], 0);
+          exit;
+        end;
+      end;
+
+      // get max leaf counters
+      largestcount := 0;
+      for i := 0 to 99 do // bin
+      begin
+        if frequency[i] = 0 then continue; // skip empty bins
+        counter := 0;
+        for k := 0 to 9 do // leaf counts
+          counter := counter + leafcount[i,k];
+        if counter > largestcount then
+          largestcount := counter;
+      end;
+
+      // determine leaf depth needed to get counter <= 50
+      if (largestcount > 50) then
+      begin
+        smallcount := 2;
+        testvalue := largestcount;
+        while (testvalue > 50) do
+        begin
+          testvalue := largestcount div smallcount;
+          smallcount := smallcount + 1;
+        end;
+        smallcount := smallcount - 1; // leaf depth needed to reduce line lengths to 50 or less
+      end else
+        smallcount := 1;
+
+      // rescale leafs
+      for i := 0 to 99 do // bin
+        for k := 0 to 9 do // leaf
+          leafcount[i,k] := leafcount[i,k] div smallcount;
+
+      // plot results
+      for i := 0 to 99 do
+      begin
+        if frequency[i] = 0 then continue; // skip empty bins
+        outline := format('%6d     %3d    ',[frequency[i], bins[i]]);
+        for k := 0 to 9 do
+        begin
+          if leafcount[i,k] = 0 then continue;
+          for L := 1 to leafcount[i,k] do
+            outline := outline + Format('%d',[k]);
+        end;
+        lReport.Add(outline);
+      end;
+
+      // summarize values
+      lReport.Add('');
+      lReport.Add('Stem Width:        %8.3f', [stemSize]);
+      lReport.Add('Max. Leaf Depth:   %8d', [smallcount]);
+      lReport.Add('Min. Value:        %8.3f', [min]);
+      lReport.Add('Max. Value:        %8.3f', [max]);
+      lReport.Add('No. of good cases: %8d', [ncases]);
+      lReport.Add('');
+      lReport.Add('-------------------------------------------------------------');
+      lReport.Add('');
+    end;  // next jth variable
+
+    DisplayReport(lReport);
+
+  finally
+    lReport.Free;
+    frequency := nil;
+    bins := nil;
+    ValueString := nil;
+    values := nil;
+    selected := nil;
+    leafcount := nil;
+  end;
+end;
+
+procedure TStemLeafFrm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([HelpBtn.Width, ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  HelpBtn.Constraints.MinWidth := w;
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TStemLeafFrm.InBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while i < VarList.Items.Count do
+  begin
+    if VarList.Selected[i] then
+    begin
+      SelectList.Items.Add(VarList.Items[i]);
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TStemLeafFrm.OutBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while i < SelectList.Items.Count do
+  begin
+    if SelectList.Selected[i] then
+    begin
+      VarList.Items.Add(SelectList.Items[i]);
+      SelectList.items.Delete(i);
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TStemLeafFrm.UpdateBtnStates;
+var
+  lSelected: Boolean;
+  i: Integer;
+begin
+  lSelected := false;
+  for i := 0 to VarList.Items.Count-1 do
+    if VarList.Selected[i] then
+    begin
+      lSelected := true;
+      break;
+    end;
+  InBtn.Enabled := lSelected;
+
+  lSelected := false;
+  for i := 0 to SelectList.Items.Count-1 do
+    if SelectList.Selected[i] then
+    begin
+      lSelected := true;
+      break;
+    end;
+  OutBtn.Enabled := lSelected;
+end;
+
+procedure TStemLeafFrm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+initialization
+  {$I stemleafunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/descriptive/xvsmultyunit.lfm

@@ -0,0 +1,357 @@
+object XvsMultYForm: TXvsMultYForm
+  Left = 288
+  Height = 467
+  Top = 117
+  Width = 452
+  Caption = 'X vs Multiple Y Plot'
+  ClientHeight = 467
+  ClientWidth = 452
+  OnActivate = FormActivate
+  OnCreate = FormCreate
+  OnShow = ResetBtnClick
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object Label4: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = PlotTitleEdit
+    AnchorSideTop.Side = asrCenter
+    Left = 8
+    Height = 15
+    Top = 332
+    Width = 49
+    BorderSpacing.Left = 8
+    Caption = 'Plot Title:'
+    ParentColor = False
+  end
+  object PlotTitleEdit: TEdit
+    AnchorSideLeft.Control = Label4
+    AnchorSideLeft.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = GroupBox1
+    Left = 65
+    Height = 23
+    Top = 328
+    Width = 379
+    Anchors = [akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Right = 8
+    TabOrder = 1
+    TextHint = 'Title above the chart'
+  end
+  object GroupBox1: TGroupBox
+    AnchorSideLeft.Control = Owner
+    AnchorSideBottom.Control = Bevel2
+    Left = 8
+    Height = 51
+    Top = 359
+    Width = 336
+    Anchors = [akLeft, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Options'
+    ChildSizing.LeftRightSpacing = 12
+    ChildSizing.TopBottomSpacing = 6
+    ChildSizing.HorizontalSpacing = 24
+    ChildSizing.VerticalSpacing = 2
+    ChildSizing.EnlargeHorizontal = crsScaleChilds
+    ChildSizing.EnlargeVertical = crsScaleChilds
+    ChildSizing.ShrinkHorizontal = crsScaleChilds
+    ChildSizing.ShrinkVertical = crsScaleChilds
+    ChildSizing.Layout = cclLeftToRightThenTopToBottom
+    ChildSizing.ControlsPerLine = 2
+    ClientHeight = 31
+    ClientWidth = 332
+    TabOrder = 2
+    object DescChk: TCheckBox
+      Left = 12
+      Height = 19
+      Top = 6
+      Width = 127
+      BorderSpacing.Left = 12
+      BorderSpacing.Top = 2
+      Caption = 'Descriptive Statistics'
+      Checked = True
+      State = cbChecked
+      TabOrder = 0
+    end
+    object LinesBox: TCheckBox
+      AnchorSideTop.Side = asrBottom
+      Left = 163
+      Height = 19
+      Top = 6
+      Width = 157
+      BorderSpacing.Left = 12
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 6
+      BorderSpacing.Bottom = 6
+      Caption = 'Connect Points with Lines'
+      TabOrder = 1
+    end
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Memo1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = PlotTitleEdit
+    Left = 8
+    Height = 214
+    Top = 106
+    Width = 436
+    Anchors = [akTop, akLeft, akRight, akBottom]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    BevelOuter = bvNone
+    ClientHeight = 214
+    ClientWidth = 436
+    Constraints.MinHeight = 200
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Panel1
+      Left = 0
+      Height = 15
+      Top = 0
+      Width = 49
+      Caption = 'Variables:'
+      ParentColor = False
+    end
+    object VarList: TListBox
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = Label1
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = XInBtn
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 0
+      Height = 197
+      Top = 17
+      Width = 196
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Top = 2
+      BorderSpacing.Right = 8
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 0
+    end
+    object XInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = VarList
+      Left = 204
+      Height = 28
+      Top = 17
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = XInBtnClick
+      Spacing = 0
+      TabOrder = 1
+    end
+    object XOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = XInBtn
+      AnchorSideTop.Side = asrBottom
+      Left = 204
+      Height = 28
+      Top = 49
+      Width = 28
+      BorderSpacing.Top = 4
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = XOutBtnClick
+      Spacing = 0
+      TabOrder = 2
+    end
+    object YInBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideBottom.Control = Bevel1
+      Left = 204
+      Height = 28
+      Top = 133
+      Width = 28
+      Anchors = [akLeft, akBottom]
+      Images = MainDataModule.ImageList
+      ImageIndex = 1
+      OnClick = YInBtnClick
+      Spacing = 0
+      TabOrder = 4
+    end
+    object YOutBtn: TBitBtn
+      AnchorSideLeft.Control = Panel1
+      AnchorSideLeft.Side = asrCenter
+      AnchorSideTop.Control = Bevel1
+      AnchorSideTop.Side = asrBottom
+      Left = 204
+      Height = 28
+      Top = 165
+      Width = 28
+      Images = MainDataModule.ImageList
+      ImageIndex = 0
+      OnClick = YOutBtnClick
+      Spacing = 0
+      TabOrder = 5
+    end
+    object Label2: TLabel
+      AnchorSideLeft.Control = XEdit
+      AnchorSideBottom.Control = XEdit
+      Left = 240
+      Height = 15
+      Top = 25
+      Width = 54
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 2
+      Caption = 'X Variable:'
+      ParentColor = False
+    end
+    object Label3: TLabel
+      AnchorSideLeft.Control = YBox
+      AnchorSideBottom.Control = YBox
+      Left = 240
+      Height = 15
+      Top = 95
+      Width = 64
+      Anchors = [akLeft, akBottom]
+      BorderSpacing.Bottom = 2
+      Caption = 'Y Variable(s)'
+      ParentColor = False
+    end
+    object XEdit: TEdit
+      AnchorSideLeft.Control = XInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = XOutBtn
+      AnchorSideBottom.Side = asrBottom
+      Left = 240
+      Height = 23
+      Top = 42
+      Width = 196
+      Anchors = [akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      BorderSpacing.Bottom = 12
+      ReadOnly = True
+      TabOrder = 3
+      Text = 'XEdit'
+    end
+    object YBox: TListBox
+      AnchorSideLeft.Control = YInBtn
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      AnchorSideBottom.Control = Panel1
+      AnchorSideBottom.Side = asrBottom
+      Left = 240
+      Height = 102
+      Top = 112
+      Width = 196
+      Anchors = [akTop, akLeft, akRight, akBottom]
+      BorderSpacing.Left = 8
+      ItemHeight = 0
+      MultiSelect = True
+      OnSelectionChange = VarListSelectionChange
+      TabOrder = 6
+    end
+    object Bevel1: TBevel
+      AnchorSideTop.Control = YBox
+      AnchorSideTop.Side = asrCenter
+      Left = 210
+      Height = 4
+      Top = 161
+      Width = 14
+      Shape = bsSpacer
+    end
+  end
+  object Memo1: TLabel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 8
+    Height = 90
+    Top = 8
+    Width = 436
+    Anchors = [akTop, akLeft, akRight]
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    Caption = 'Directions:  '#13#10'1.   Select the X variable common to all of the Y variables to be selected.'#13#10'2.   Select the Y variables.'#13#10'3.   Enter a label for the plot.'#13#10'4.   Select the options desired.'#13#10'5.   Click the Compute button to obtain results.'
+    ParentColor = False
+  end
+  object CloseBtn: TButton
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 385
+    Height = 25
+    Top = 434
+    Width = 55
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Close'
+    ModalResult = 11
+    TabOrder = 3
+  end
+  object ComputeBtn: TButton
+    AnchorSideRight.Control = CloseBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 297
+    Height = 25
+    Top = 434
+    Width = 76
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 8
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 4
+  end
+  object ResetBtn: TButton
+    AnchorSideRight.Control = ComputeBtn
+    AnchorSideBottom.Control = Owner
+    AnchorSideBottom.Side = asrBottom
+    Left = 235
+    Height = 25
+    Top = 434
+    Width = 54
+    Anchors = [akRight, akBottom]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 8
+    BorderSpacing.Bottom = 8
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 5
+  end
+  object Bevel2: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    AnchorSideBottom.Control = CloseBtn
+    Left = 0
+    Height = 8
+    Top = 418
+    Width = 452
+    Anchors = [akLeft, akRight, akBottom]
+    Shape = bsBottomLine
+  end
+end

applications/lazstats/source/forms/analysis/descriptive/xvsmultyunit.pas

@@ -0,0 +1,449 @@
+// Use file "SchoolsData.laz" for testing
+
+unit XvsMultYUnit;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
+  StdCtrls, Buttons, ExtCtrls, Printers,
+  MainUnit, Globals, OutputUnit, DataProcs, BlankFrmUnit, MatrixLib;
+
+type
+
+  { TXvsMultYForm }
+
+  TXvsMultYForm = class(TForm)
+    Bevel1: TBevel;
+    Bevel2: TBevel;
+    LinesBox: TCheckBox;
+    DescChk: TCheckBox;
+    GroupBox1: TGroupBox;
+    Memo1: TLabel;
+    Panel1: TPanel;
+    ResetBtn: TButton;
+    ComputeBtn: TButton;
+    CloseBtn: TButton;
+    PlotTitleEdit: TEdit;
+    Label4: TLabel;
+    YBox: TListBox;
+    XEdit: TEdit;
+    Label2: TLabel;
+    Label3: TLabel;
+    XInBtn: TBitBtn;
+    YInBtn: TBitBtn;
+    Label1: TLabel;
+    XOutBtn: TBitBtn;
+    YOutBtn: TBitBtn;
+    VarList: TListBox;
+    procedure ComputeBtnClick(Sender: TObject);
+    procedure FormActivate(Sender: TObject);
+    procedure FormCreate(Sender: TObject);
+    procedure ResetBtnClick(Sender: TObject);
+    procedure VarListSelectionChange(Sender: TObject; User: boolean);
+    procedure XInBtnClick(Sender: TObject);
+    procedure XOutBtnClick(Sender: TObject);
+    procedure YInBtnClick(Sender: TObject);
+    procedure YOutBtnClick(Sender: TObject);
+  private
+    { private declarations }
+    FAutoSized: Boolean;
+    selected: IntDyneVec;
+    procedure PlotXY(XValues : DblDyneVec; YValues : DblDyneMat; MaxX, MinX,
+       MaxY, MinY : double; N, NoY : integer);
+    procedure UpdateBtnStates;
+  public
+    { public declarations }
+  end; 
+
+var
+  XvsMultYForm: TXvsMultYForm;
+
+implementation
+
+uses
+  Math;
+
+{ TXvsMultYForm }
+
+procedure TXvsMultYForm.ResetBtnClick(Sender: TObject);
+VAR i : integer;
+begin
+     VarList.Clear;
+     YBox.Clear;
+     XEdit.Clear;
+     XInBtn.Enabled := true;
+     XOutBtn.Enabled := false;
+     YInBtn.Enabled := true;
+     YOutBtn.Enabled := false;
+     PlotTitleEdit.Text := '';
+     for i := 1 to NoVariables do
+         VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
+end;
+
+procedure TXvsMultYForm.VarListSelectionChange(Sender: TObject; User: boolean);
+begin
+  UpdateBtnStates;
+end;
+
+procedure TXvsMultYForm.ComputeBtnClick(Sender: TObject);
+var
+  i, j, k, N, NoY, XCol, NoSelected: integer;
+  YValues, RMatrix: DblDyneMat;
+  XValues, Means, Variances, StdDevs: DblDyneVec;
+  MinX, MaxX, MinY, MaxY, temp: double;
+  Title: string;
+  RowLabels, ColLabels: StrDyneVec;
+  lReport: TStrings;
+  errorcode: boolean = false;
+  Ncases: integer = 0;
+begin
+  if XEdit.Text = '' then
+  begin
+    MessageDlg('No X variable selected.', mtError, [mbOK], 0);
+    exit;
+  end;
+
+  if YBox.Items.Count = 0 then
+  begin
+    MessageDlg('No Y variables selected.', mtError, [mbOK], 0);
+    exit;
+  end;
+
+  NoY := YBox.Items.Count;
+  MaxX := -10000;
+  MinX := 10000;
+  MaxY := -1000;
+  MinY := 1000;
+  N := 0;
+
+  SetLength(selected, NoY + 1);
+  SetLength(RowLabels,NoVariables);
+  SetLength(ColLabels,NoVariables);
+
+  XCol := 0;
+  for i := 1 to NoVariables do
+    if Trim(XEdit.Text) = Trim(OS3MainFrm.DataGrid.Cells[i,0]) then
+    begin
+      XCol := i;
+      break;
+    end;
+
+  for j := 0 to NoY-1 do
+  begin
+    selected[j] := 0;
+    for i := 1 to NoVariables do
+      if Trim(YBox.Items.Strings[j]) = Trim(OS3MainFrm.DataGrid.Cells[i,0]) then
+      begin
+        selected[j] := i;
+        Break;
+      end;
+  end;
+
+  selected[NoY] := XCol;
+  NoSelected := NoY + 1;
+  for i := 0 to NoSelected-1 do
+  begin
+    RowLabels[i] := Trim(OS3MainFrm.DataGrid.Cells[selected[i],0]);
+    ColLabels[i] := RowLabels[i];
+  end;
+
+  Caption := RowLabels[0] + ' ' + RowLabels[1];
+
+  lReport := TStringList.Create;
+  try
+    lReport.Add('X VERSUS MULTIPLE Y VALUES PLOT');
+    lReport.Add('');
+
+    SetLength(YValues, NoCases+1, NoY+1);
+    SetLength(XValues, NoCases+1);
+    SetLength(Means, NoSelected+1);
+    SetLength(Variances, NoSelected+1);
+    SetLength(StdDevs, NoSelected+1);
+    SetLength(RMatrix, NoSelected+1, NoSelected+1);
+    SetLength(selected, NoVariables);
+
+    for i := 0 to NoSelected - 1 do
+    begin
+      Means[i] := 0.0;
+      StdDevs[i] := 0.0;
+      for j := 0 to NoSelected-1 do RMatrix[i,j] := 0.0;
+    end;
+
+    for i := 1 to NoCases do
+    begin
+      if not GoodRecord(i,NoSelected,selected) then continue;
+      XValues[i] := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[XCol,i]));
+      if XValues[i] > MaxX then MaxX := XValues[i];
+      if XValues[i] < MinX then MinX := XValues[i];
+      for j := 0 to NoY - 1 do
+      begin
+        YValues[i-1,j] := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[selected[j],i]));
+        if YValues[i-1,j] > MaxY then MaxY := YValues[i-1,j];
+        if YValues[i-1,j] < MinY then MinY := YValues[i-1,j];
+      end;
+    end;
+
+    // get descriptive data
+    if DescChk.Checked then
+    begin
+      Correlations(NoSelected,selected,RMatrix,Means,Variances,StdDevs,errorcode,Ncases);
+      N := Ncases;
+      Title := 'CORRELATIONS';
+      MatPrint(RMatrix, NoSelected, NoSelected, Title, RowLabels, ColLabels, N, lReport);
+      Title := 'Means';
+      DynVectorPrint(Means, NoSelected, Title, RowLabels, N, lReport);
+      Title := 'Variances';
+      DynVectorPrint(Variances, NoSelected, Title, RowLabels, N, lReport);
+      Title := 'Standard Deviations';
+      DynVectorPrint(StdDevs, NoSelected, Title, RowLabels, N, lReport);
+    end;
+
+    DisplayReport(lReport);
+
+    // sort on X
+    for i := 0 to N-2 do
+    begin
+      for j := i+1 to N-1 do
+      begin
+        if XValues[i] > XValues[j] then // swap
+        begin
+          temp := XValues[i];
+          XValues[i] := XValues[j];
+          XValues[j] := temp;
+          for k := 0 to NoY-1 do
+          begin
+            temp := YValues[i,k];
+            YValues[i,k] := YValues[j,k];
+            YValues[j,k] := temp;
+          end;
+        end;
+      end;
+    end;
+    PlotXY(XValues, YValues, MaxX, MinX, MaxY, MinY, N, NoY);
+
+  finally
+    lReport.Free;
+    RMatrix := nil;
+    StdDevs := nil;
+    Variances := nil;
+    Means := nil;
+    XValues := nil;
+    YValues := nil;
+    selected := nil;
+    ColLabels := nil;
+    RowLabels := nil;
+  end;
+end;
+
+procedure TXvsMultYForm.FormActivate(Sender: TObject);
+var
+  w: Integer;
+begin
+  if FAutoSized then
+    exit;
+
+  w := MaxValue([ResetBtn.Width, ComputeBtn.Width, CloseBtn.Width]);
+  ResetBtn.Constraints.MinWidth := w;
+  ComputeBtn.Constraints.MinWidth := w;
+  CloseBtn.Constraints.MinWidth := w;
+
+  Constraints.MinWidth := Width;
+  Constraints.MinHeight := Height;
+
+  FAutoSized := true;
+end;
+
+procedure TXvsMultYForm.FormCreate(Sender: TObject);
+begin
+  Assert(OS3MainFrm <> nil);
+
+  if BlankFrm = nil then
+    Application.CreateForm(TBlankFrm, BlankFrm);
+end;
+
+procedure TXvsMultYForm.XInBtnClick(Sender: TObject);
+var
+  index: integer;
+begin
+  index := VarList.ItemIndex;
+  if (index > -1) and (XEdit.Text = '') then
+  begin
+    XEdit.Text := VarList.Items[index];
+    VarList.Items.Delete(index);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TXvsMultYForm.XOutBtnClick(Sender: TObject);
+begin
+  if (XEdit.Text <> '') then
+  begin
+    VarList.Items.Add(XEdit.Text);
+    XEdit.Text := '';
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TXvsMultYForm.YInBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while i < VarList.Items.Count do
+  begin
+    if VarList.Selected[i] then
+    begin
+      YBox.Items.Add(VarList.Items[i]);
+      VarList.Items.Delete(i);
+      i := 0;
+    end else
+      inc(i);
+  end;
+  UpdateBtnStates;
+end;
+
+procedure TXvsMultYForm.YOutBtnClick(Sender: TObject);
+var
+  i: integer;
+begin
+  i := 0;
+  while i < YBox.Items.Count do
+  begin
+    if (YBox.Selected[i]) then
+    begin
+      VarList.Items.Add(YBox.Items[i]);
+      YBox.Items.Delete(i);
+      i := 0;
+    end else
+      i := i + 1;
+  end;
+  UpdateBtnStates;
+end;
+
+// routine to plot X versus multiple Y values
+procedure TXvsMultYForm.PlotXY(XValues: DblDyneVec; YValues: DblDyneMat;
+   MaxX, MinX, MaxY, MinY: double; N, NoY: integer);
+var
+  i, j, xpos, ypos, hleft, hright, vtop, vbottom, imagewide: integer;
+  vhi, hwide, offset, strhi, imagehi: integer;
+  valincr, Yvalue, Xvalue: double;
+  Title: string;
+begin
+  Title := PlotTitleEdit.Text;
+  BlankFrm.Caption := Title;
+  BlankFrm.Show;
+
+  imagewide := BlankFrm.Image1.Width;
+  imagehi := BlankFrm.Image1.Height;
+  vtop := 40;
+  vbottom := round(imagehi) - 60;
+  vhi := vbottom - vtop;
+  hleft := 100;
+  hright := imagewide - 80;
+  hwide := hright - hleft;
+
+  // Draw chart border and background
+  BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+  BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+  BlankFrm.Image1.Canvas.Rectangle(0, 0, imagewide, imagehi);
+
+  // Draw title
+  Title := PlotTitleEdit.Text;
+  if Title <> '' then
+  begin
+    xpos := (imagewide - BlankFrm.Image1.Canvas.TextWidth(Title)) div 2;
+    yPos := 2;
+    BlankFrm.Image1.Canvas.TextOut(xpos, ypos, Title);
+  end;
+
+  // draw horizontal axis
+  BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+  BlankFrm.Image1.Canvas.MoveTo(hleft,vbottom);
+  BlankFrm.Image1.Canvas.LineTo(hright,vbottom);
+  valincr := (maxX - minX) / 10.0;
+  for i := 1 to 11 do
+  begin
+    ypos := vbottom;
+    Xvalue := minX + valincr * (i - 1);
+    xpos := hleft + round(hwide * ((Xvalue - minX) / (maxX - minX)));
+    BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+    ypos := ypos + 10;
+    BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+    Title := Format('%.2f', [Xvalue]);
+    offset := BlankFrm.Image1.Canvas.TextWidth(Title) div 2;
+    xpos := xpos - offset;
+    BlankFrm.Image1.Canvas.Pen.Color := clBlack;
+    BlankFrm.Image1.Canvas.TextOut(xpos, ypos, Title);
+  end;
+  xpos := hleft + (hwide - BlankFrm.Image1.Canvas.TextWidth(XEdit.Text)) div 2;
+  ypos := vbottom + 30;
+  BlankFrm.Image1.Canvas.TextOut(xpos, ypos, XEdit.Text);
+
+  // draw vertical axis
+  Title := 'Y VALUES';
+  xpos := hleft - BlankFrm.Image1.Canvas.TextWidth(Title) div 2;
+  ypos := 8;
+  BlankFrm.Image1.Canvas.TextOut(xpos, ypos, Title);
+  xpos := hleft;
+  ypos := vtop;
+  BlankFrm.Image1.Canvas.MoveTo(xpos, ypos);
+  ypos := vbottom;
+  BlankFrm.Image1.Canvas.LineTo(xpos, ypos);
+  valincr := (maxY - minY) / 10.0;
+  for i := 1 to 11 do
+  begin
+    Title := Format('%.2f',[maxY - ((i-1)*valincr)]);
+    strhi := BlankFrm.Image1.Canvas.TextHeight(Title);
+    xpos := hleft - 20 - BlankFrm.Image1.Canvas.TextWidth(Title);
+    Yvalue := maxY - (valincr * (i-1));
+    ypos := round(vhi * ( (maxY - Yvalue) / (maxY - minY)));
+    ypos := ypos + vtop - strhi div 2;
+    BlankFrm.Image1.Canvas.TextOut(xpos, ypos, Title);
+    xpos := hleft;
+    ypos := ypos + strhi div 2;
+    BlankFrm.Image1.Canvas.MoveTo(xpos,ypos);
+    xpos := hleft - 10;
+    BlankFrm.Image1.Canvas.LineTo(xpos,ypos);
+  end;
+
+  // draw points for x and y pairs
+  for j := 0 to NoY-1 do
+  begin
+    BlankFrm.Image1.Canvas.Brush.Style := bsSolid;
+    BlankFrm.Image1.Canvas.Brush.Color := DATA_COLORS[j mod Length(DATA_COLORS)];
+    BlankFrm.Image1.Canvas.Pen.Color := DATA_COLORS[j mod Length(DATA_COLORS)];
+    BlankFrm.Image1.Canvas.Font.Color := DATA_COLORS[j mod Length(DATA_COLORS)];
+    Title := Trim(OS3MainFrm.DataGrid.Cells[selected[j],0]);
+    for i := 1 to N do
+    begin
+      ypos := vtop + round(vhi * ( (maxY - YValues[i-1,j]) / (maxY - minY)));
+      xpos := hleft + round(hwide * ( (XValues[i-1]-minX) / (maxX - minX)));
+      if xpos < hleft then xpos := hleft;
+      if i = 1 then
+        BlankFrm.Image1.Canvas.MoveTo(xpos, ypos);
+      if LinesBox.Checked then
+        BlankFrm.Image1.Canvas.LineTo(xpos, ypos);
+      BlankFrm.Image1.Canvas.Ellipse(xpos, ypos, xpos+5, ypos+5);
+    end;
+    strhi := BlankFrm.Image1.Canvas.TextHeight(Title);
+    BlankFrm.Image1.Canvas.Brush.Color := clWhite;
+    xpos := hwide + hleft;
+    BlankFrm.Image1.Canvas.MoveTo(xpos, ypos-strhi);
+    BlankFrm.Image1.Canvas.TextOut(xpos, ypos, Title);
+  end;
+
+  BlankFrm.Image1.Canvas.Font.Color := clBlack;
+end;
+
+procedure TXvsMultYForm.UpdateBtnStates;
+begin
+end;
+
+initialization
+  {$I xvsmultyunit.lrs}
+
+end.
+

applications/lazstats/source/forms/analysis/financial/dbldeclineunit.lfm

@@ -0,0 +1,254 @@
+object DblDeclineFrm: TDblDeclineFrm
+  Left = 583
+  Height = 216
+  Top = 330
+  Width = 401
+  AutoSize = True
+  BorderStyle = bsDialog
+  Caption = 'Double Declining Value'
+  ClientHeight = 216
+  ClientWidth = 401
+  OnActivate = FormActivate
+  OnShow = FormShow
+  Position = poMainFormCenter
+  LCLVersion = '2.1.0.0'
+  object ResetBtn: TButton
+    AnchorSideTop.Control = ReturnBtn
+    AnchorSideRight.Control = ComputeBtn
+    Left = 174
+    Height = 25
+    Top = 179
+    Width = 54
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Right = 12
+    Caption = 'Reset'
+    OnClick = ResetBtnClick
+    TabOrder = 2
+  end
+  object ComputeBtn: TButton
+    AnchorSideTop.Control = ReturnBtn
+    AnchorSideRight.Control = ReturnBtn
+    Left = 240
+    Height = 25
+    Top = 179
+    Width = 76
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Right = 12
+    Caption = 'Compute'
+    OnClick = ComputeBtnClick
+    TabOrder = 3
+  end
+  object ReturnBtn: TButton
+    AnchorSideTop.Control = Bevel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 328
+    Height = 25
+    Top = 179
+    Width = 61
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BorderSpacing.Bottom = 8
+    Caption = 'Return'
+    ModalResult = 1
+    TabOrder = 4
+  end
+  object HelpBtn: TButton
+    Tag = 118
+    AnchorSideTop.Control = ReturnBtn
+    AnchorSideRight.Control = ResetBtn
+    Left = 111
+    Height = 25
+    Top = 179
+    Width = 51
+    Anchors = [akTop, akRight]
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Right = 12
+    Caption = 'Help'
+    OnClick = HelpBtnClick
+    TabOrder = 1
+  end
+  object Bevel1: TBevel
+    AnchorSideLeft.Control = Owner
+    AnchorSideTop.Control = Panel1
+    AnchorSideTop.Side = asrBottom
+    AnchorSideRight.Control = Owner
+    AnchorSideRight.Side = asrBottom
+    Left = 0
+    Height = 8
+    Top = 163
+    Width = 401
+    Anchors = [akTop, akLeft, akRight]
+    Shape = bsBottomLine
+  end
+  object Panel1: TPanel
+    AnchorSideLeft.Control = Owner
+    AnchorSideLeft.Side = asrCenter
+    AnchorSideTop.Control = Owner
+    Left = 87
+    Height = 155
+    Top = 8
+    Width = 227
+    AutoSize = True
+    BorderSpacing.Left = 12
+    BorderSpacing.Top = 8
+    BorderSpacing.Right = 12
+    BevelOuter = bvNone
+    ClientHeight = 155
+    ClientWidth = 227
+    TabOrder = 0
+    object Label1: TLabel
+      AnchorSideTop.Control = CostEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = Label5
+      AnchorSideRight.Side = asrBottom
+      Left = 63
+      Height = 15
+      Top = 4
+      Width = 56
+      Anchors = [akTop, akRight]
+      Caption = 'Initial Cost'
+      ParentColor = False
+    end
+    object Label2: TLabel
+      AnchorSideTop.Control = LifeEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = Label5
+      AnchorSideRight.Side = asrBottom
+      Left = 37
+      Height = 15
+      Top = 35
+      Width = 82
+      Anchors = [akTop, akRight]
+      Caption = 'Life Expectancy'
+      ParentColor = False
+    end
+    object Label3: TLabel
+      AnchorSideTop.Control = EndEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = Label5
+      AnchorSideRight.Side = asrBottom
+      Left = 68
+      Height = 15
+      Top = 66
+      Width = 51
+      Anchors = [akTop, akRight]
+      Caption = 'End Value'
+      ParentColor = False
+    end
+    object Label4: TLabel
+      AnchorSideTop.Control = PeriodEdit
+      AnchorSideTop.Side = asrCenter
+      AnchorSideRight.Control = Label5
+      AnchorSideRight.Side = asrBottom
+      Left = 15
+      Height = 15
+      Top = 97
+      Width = 104
+      Anchors = [akTop, akRight]
+      Caption = 'Depreciation Period'
+      ParentColor = False
+    end
+    object Label5: TLabel
+      AnchorSideLeft.Control = Panel1
+      AnchorSideTop.Control = DeprecEdit
+      AnchorSideTop.Side = asrCenter
+      Left = 0
+      Height = 15
+      Top = 136
+      Width = 119
+      Caption = 'Obtained Depreciation'
+      ParentColor = False
+    end
+    object CostEdit: TEdit
+      AnchorSideLeft.Control = DeprecEdit
+      AnchorSideTop.Control = Panel1
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 127
+      Height = 23
+      Top = 0
+      Width = 100
+      Alignment = taRightJustify
+      Anchors = [akTop, akLeft, akRight]
+      TabOrder = 0
+      Text = 'CostEdit'
+    end
+    object LifeEdit: TEdit
+      AnchorSideLeft.Control = DeprecEdit
+      AnchorSideTop.Control = CostEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 127
+      Height = 23
+      Top = 31
+      Width = 100
+      Alignment = taRightJustify
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Top = 8
+      TabOrder = 1
+      Text = 'Edit1'
+    end
+    object EndEdit: TEdit
+      AnchorSideLeft.Control = DeprecEdit
+      AnchorSideTop.Control = LifeEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 127
+      Height = 23
+      Top = 62
+      Width = 100
+      Alignment = taRightJustify
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Top = 8
+      TabOrder = 2
+      Text = 'Edit1'
+    end
+    object PeriodEdit: TEdit
+      AnchorSideLeft.Control = DeprecEdit
+      AnchorSideTop.Control = EndEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 127
+      Height = 23
+      Top = 93
+      Width = 100
+      Alignment = taRightJustify
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Top = 8
+      TabOrder = 3
+      Text = 'Edit1'
+    end
+    object DeprecEdit: TEdit
+      AnchorSideLeft.Control = Label5
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = PeriodEdit
+      AnchorSideTop.Side = asrBottom
+      AnchorSideRight.Control = Panel1
+      AnchorSideRight.Side = asrBottom
+      Left = 127
+      Height = 23
+      Top = 132
+      Width = 100
+      Alignment = taRightJustify
+      Anchors = [akTop, akLeft, akRight]
+      BorderSpacing.Left = 8
+      BorderSpacing.Top = 16
+      Constraints.MinWidth = 100
+      Font.Style = [fsBold]
+      ParentFont = False
+      ReadOnly = True
+      TabOrder = 4
+      Text = 'Edit1'
+    end
+  end
+end