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456 lines
15 KiB
ObjectPascal
456 lines
15 KiB
ObjectPascal
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unit FreqUnit;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
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StdCtrls, Buttons, ExtCtrls, Globals, MainUnit, OutPutUnit, FunctionsLib,
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GraphLib, DataProcs;
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type
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{ TFreqFrm }
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TFreqFrm = class(TForm)
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ResetBtn: TButton;
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CancelBtn: TButton;
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OKBtn: TButton;
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NormPltChk: TCheckBox;
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InBtn: TBitBtn;
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OutBtn: TBitBtn;
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AllBtn: TBitBtn;
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Label1: TLabel;
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Label2: TLabel;
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ListBox1: TListBox;
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RadioGroup1: TRadioGroup;
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RadioGroup2: TRadioGroup;
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VarList: TListBox;
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procedure AllBtnClick(Sender: TObject);
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procedure CancelBtnClick(Sender: TObject);
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procedure FormShow(Sender: TObject);
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procedure InBtnClick(Sender: TObject);
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procedure OKBtnClick(Sender: TObject);
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procedure OutBtnClick(Sender: TObject);
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procedure ResetBtnClick(Sender: TObject);
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private
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{ private declarations }
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public
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{ public declarations }
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end;
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var
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FreqFrm: TFreqFrm;
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implementation
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{ TFreqFrm }
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uses FreqSpecsUnit;
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procedure TFreqFrm.ResetBtnClick(Sender: TObject);
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var
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i : integer;
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begin
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VarList.Clear;
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ListBox1.Clear;
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for i := 1 to NoVariables do
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begin
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VarList.Items.Add(OS3MainFrm.DataGrid.Cells[i,0]);
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end;
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RadioGroup2.ItemIndex := -1;
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InBtn.Enabled := true;
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OutBtn.Enabled := false;
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RadioGroup1.ItemIndex := -1;
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NormPltChk.Checked := false;
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end;
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procedure TFreqFrm.CancelBtnClick(Sender: TObject);
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begin
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FreqFrm.Hide;
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end;
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procedure TFreqFrm.FormShow(Sender: TObject);
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begin
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ResetBtnClick(self);
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end;
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procedure TFreqFrm.AllBtnClick(Sender: TObject);
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var
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count, index : integer;
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begin
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count := VarList.Items.Count;
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for index := 0 to count-1 do
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begin
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ListBox1.Items.Add(VarList.Items.Strings[index]);
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end;
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VarList.Clear;
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end;
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procedure TFreqFrm.InBtnClick(Sender: TObject);
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var
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index, i : integer;
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begin
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index := VarList.Items.Count;
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i := 0;
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while i < index do
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begin
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if (VarList.Selected[i]) then
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begin
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ListBox1.Items.Add(VarList.Items.Strings[i]);
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VarList.Items.Delete(i);
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index := index - 1;
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i := 0;
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end
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else i := i + 1;
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end;
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OutBtn.Enabled := true;
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end;
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procedure TFreqFrm.OKBtnClick(Sender: TObject);
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label again, cleanup;
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var
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i, j, k : integer;
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freq : DblDyneVec;
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pcnt : DblDyneVec;
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cumpcnt : DblDyneVec;
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pcntilerank : DblDyneVec;
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cumfreq : DblDyneVec;
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XValue : DblDyneVec;
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value : double;
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NoVars : integer;
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plottype : integer;
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cellval : string;
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col : integer;
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min, max : double;
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range : double;
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incrsize : double;
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nointervals : double;
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nints : integer;
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outline : string;
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// ColNoSelected : IntDyneVec;
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NoSelected : integer;
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NormDist : boolean;
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Histogram : boolean;
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Sumx, Sumx2, Mean, Variance, StdDev, zlow, zhi : double;
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X, zproplow, zprophi, zfreq : double;
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Ncases : integer;
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begin
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if RadioGroup2.ItemIndex = 1 then Histogram := true else Histogram := false;
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if NormPltChk.Checked = true then NormDist := true else NormDist := false;
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SetLength(freq,NoCases);
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SetLength(pcnt,NoCases);
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SetLength(cumpcnt,NoCases);
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SetLength(pcntilerank,NoCases);
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SetLength(cumfreq,NoCases);
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SetLength(XValue,NoCases);
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OutPutFrm.RichEdit.Clear;
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OutPutFrm.RichEdit.Lines.Add('FREQUENCY ANALYSIS BY BILL MILLER');
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OutPutFrm.RichEdit.Lines.Add('');
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// OutPutFrm.RichEdit.ParaGraph.Alignment := taLeftJustify;
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{ Analyze each variable }
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NoVars := ListBox1.Items.Count;
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for i := 1 to NoVars do
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begin
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{ get column no. of variable }
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col := 1;
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cellval := ListBox1.Items.Strings[i-1];
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for j := 1 to NoVariables do
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begin
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if OS3MainFrm.DataGrid.Cells[j,0] = cellval then
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begin
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col := j;
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outline := format('Frequency Analysis for %s',[cellval]);
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OutPutFrm.RichEdit.Lines.Add(outline);
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break;
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end;
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end;
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NoSelected := 1;
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{ get min and max values for variable in col }
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min := 1.0e32;
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max := -1.0e32;
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for j := 1 to NoCases do
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begin
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if Not ValidValue(j,col) then continue;
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value := StrToFloat(OS3MainFrm.DataGrid.Cells[col,j]);
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if value > max then max := value;
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if value < min then min := value;
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end;
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range := max - min + 1.0;
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incrsize := 1.0;
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{ if too many increments, set increment size for 15 increments }
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if range > 200.0 then incrsize := range / 15;
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nointervals := range / incrsize;
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nints := round(nointervals);
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{ Get user's approval and / or changes }
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FreqSpecsFrm.VarName.Text := cellval;
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FreqSpecsFrm.Minimum.Text := FloatToStr(min);
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FreqSpecsFrm.Maximum.Text := FloatToStr(max);
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FreqSpecsFrm.range.Text := FloatToStr(range);
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FreqSpecsFrm.IntSize.Text := FloatToStr(incrsize);
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FreqSpecsFrm.NoInts.Text := IntToStr(nints);
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again: FreqSpecsFrm.ShowModal;
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incrsize := StrToFloat(FreqSpecsFrm.IntSize.Text);
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nointervals := StrToFloat(FreqSpecsFrm.NoInts.Text);
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nints := round(nointervals);
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if nints+1 > NoCases then
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begin
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ShowMessage('ERROR! No. of intervals cannot be greater than no. of cases!');
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goto again;
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end;
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if nints > 200 then
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begin
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nints := 200;
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// Application.MessageBox('Max. increments set to 200','Exceeded Maximum!',MB_OK);
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end;
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{Now, get frequency of cases in each interval }
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for j := 1 to nints+1 do freq[j-1] := 0;
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Ncases := 0;
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for j := 1 to NoCases do
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begin
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if Not ValidValue(j,col) then continue;
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Ncases := Ncases + 1;
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value := StrToFloat(OS3MainFrm.DataGrid.Cells[col,j]);
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for k := 1 to nints do
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begin
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if (value >= min + ((k-1) * incrsize)) and
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(value < min + (k * incrsize)) then freq[k-1] := freq[k-1] + 1;
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end;
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end;
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for j := 1 to nints+1 do XValue[j-1] := min + (j-1) * incrsize;
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{ get cumulative frequencies and percents to midpoints }
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cumfreq[0] := freq[0];
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pcnt[0] := freq[0] / Ncases;
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cumpcnt[0] := cumfreq[0] / Ncases;
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pcntilerank[0] := (freq[0] / 2.0) / Ncases;
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for k := 2 to nints do
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begin
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cumfreq[k-1] := cumfreq[k-2] + freq[k-1];
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pcnt[k-1] := freq[k-1] / Ncases;
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cumpcnt[k-1] := cumfreq[k-1] / Ncases;
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pcntilerank[k-1] := (cumfreq[k-2] + freq[k-1] / 2.0) / Ncases;
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end;
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{ Now, print results }
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OutPutFrm.RichEdit.Lines.Add(' FROM TO FREQ. PCNT CUM.FREQ. CUM.PCNT. %ILE RANK');
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OutPutFrm.RichEdit.Lines.Add('');
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for k := 1 to nints do
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begin
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outline := format('%8.2f%8.2f%8.0f%8.2f %8.2f %8.2f %8.2f',
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[min+(k-1)*incrsize, // from
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min+k*incrsize, // to
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freq[k-1], // freq
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pcnt[k-1], // pcnt
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cumfreq[k-1], // cum.freq.
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cumpcnt[k-1], // cum.pcnt.
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pcntilerank[k-1]]); // %ile rank
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OutPutFrm.RichEdit.Lines.Add(outline);
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end;
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OutPutFrm.ShowModal;
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OutPutFrm.RichEdit.Clear;
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{ Now, plot values as indicated in options list }
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plottype := RadioGroup1.ItemIndex + 1;
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if Histogram = true then GraphFrm.barwideprop := 1.0 else
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GraphFrm.barwideprop := 0.5;
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if NormDist = true then GraphFrm.nosets := 2 else GraphFrm.nosets := 1;
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GraphFrm.nbars := nints+1;
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GraphFrm.Heading := cellval;
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GraphFrm.XTitle := 'Lower Limit Values';
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GraphFrm.YTitle := 'Frequency';
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if NormDist = false then
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SetLength(GraphFrm.Ypoints,1,nints+1)
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else SetLength(GraphFrm.Ypoints,2,nints+1);
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SetLength(GraphFrm.Xpoints,1,nints+1);
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for k := 1 to nints+1 do
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begin
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GraphFrm.Ypoints[0,k-1] := freq[k-1];
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GraphFrm.Xpoints[0,k-1] := XValue[k-1];
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end;
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// Create ND plot if checked
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if NormDist = true then
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begin
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OutPutFrm.RichEdit.Lines.Add('Interval ND Freq.');
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// Only use 3Dvertical plots when normal curve desired
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RadioGroup1.ItemIndex := 3;
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// get mean and standard deviation of xvalues, then height of
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// the normal curve for each Normally distributed corresponding
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// z score
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sumx := 0.0;
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sumx2 := 0.0;
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for k := 1 to nints do
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begin
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sumx := sumx + (XValue[k-1] * freq[k-1]);
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sumx2 := sumx2 + ((XValue[k-1] * XValue[k-1]) * freq[k-1]);
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end;
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Mean := sumx / Ncases;
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Variance := sumx2 - ((sumx * sumx) / Ncases);
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Variance := Variance / (Ncases - 1);
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StdDev := sqrt(Variance);
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for k := 1 to nints+1 do
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begin
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X := XValue[k-1] - (incrsize / 2.0);
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if StdDev > 0.0 then zlow := (X - Mean) / StdDev
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else zlow := 0.0;
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X := XValue[k-1] + (incrsize / 2.0);
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if StdDev > 0.0 then zhi := (X - Mean) / StdDev
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else zhi := 0.0;
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// get cum. prop. for this z and translate to frequency
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zproplow := probz(zlow);
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zprophi := probz(zhi);
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zfreq := NoCases * abs(zprophi - zproplow);
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GraphFrm.Ypoints[1,k-1] := zfreq;
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outline := format(' %2d %6.2f',[k,GraphFrm.Ypoints[1,k-1]]);
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OutPutFrm.RichEdit.Lines.Add(outline);
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end;
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OutPutFrm.ShowModal;
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OutPutFrm.RichEdit.Clear;
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end;
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if plottype = 1 then
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begin
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GraphFrm.AutoScale := true;
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GraphFrm.GraphType := plottype; // 2d Vertical Bar Chart
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GraphFrm.BackColor := clYellow;
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GraphFrm.WallColor := clBlack;
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GraphFrm.FloorColor := clLtGray;
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GraphFrm.ShowBackWall := true;
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GraphFrm.ShowModal;
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end;
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if plottype = 2 then // 3D vertical bars
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begin
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{ enter parameters for 2 dimension bars in graph package }
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GraphFrm.GraphType := plottype; // 3d vertical bars
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GraphFrm.AutoScale := true;
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GraphFrm.ShowLeftWall := true;
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GraphFrm.ShowRightWall := true;
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GraphFrm.ShowBottomWall := true;
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GraphFrm.ShowBackWall := true;
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GraphFrm.BackColor := clYellow;
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GraphFrm.WallColor := clBlack;
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GraphFrm.ShowModal;
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end;
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if plottype = 3 then
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begin
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GraphFrm.AutoScale := true;
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GraphFrm.GraphType := plottype; // 2d pie chart
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GraphFrm.BackColor := clYellow;
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GraphFrm.WallColor := clBlack;
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GraphFrm.ShowBackWall := true;
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GraphFrm.ShowModal;
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end;
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if plottype = 4 then
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begin
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GraphFrm.AutoScale := true;
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GraphFrm.GraphType := plottype; // 3d pie chart
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GraphFrm.BackColor := clYellow;
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GraphFrm.WallColor := clBlack;
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GraphFrm.ShowLeftWall := true;
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GraphFrm.ShowRightWall := true;
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GraphFrm.ShowBottomWall := true;
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GraphFrm.ShowBackWall := true;
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GraphFrm.ShowModal;
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|
end;
|
||
|
|
if plottype = 5 then // 2D Line Graph
|
||
|
|
begin
|
||
|
|
GraphFrm.AutoScale := true;
|
||
|
|
GraphFrm.GraphType := plottype; // 2d Lines
|
||
|
|
GraphFrm.BackColor := clYellow;
|
||
|
|
GraphFrm.WallColor := clBlack;
|
||
|
|
GraphFrm.ShowBackWall := true;
|
||
|
|
GraphFrm.ShowModal;
|
||
|
|
end;
|
||
|
|
if plottype = 6 then // 3D Line Chart
|
||
|
|
begin
|
||
|
|
GraphFrm.AutoScale := true;
|
||
|
|
GraphFrm.GraphType := plottype; // 3d Lines
|
||
|
|
GraphFrm.BackColor := clYellow;
|
||
|
|
GraphFrm.WallColor := clBlack;
|
||
|
|
GraphFrm.ShowLeftWall := true;
|
||
|
|
GraphFrm.ShowRightWall := true;
|
||
|
|
GraphFrm.ShowBottomWall := true;
|
||
|
|
GraphFrm.ShowBackWall := true;
|
||
|
|
GraphFrm.ShowModal;
|
||
|
|
end;
|
||
|
|
if plottype = 7 then
|
||
|
|
begin
|
||
|
|
GraphFrm.AutoScale := true;
|
||
|
|
GraphFrm.GraphType := plottype; // 2D Plot
|
||
|
|
GraphFrm.BackColor := clYellow;
|
||
|
|
GraphFrm.WallColor := clBlack;
|
||
|
|
GraphFrm.ShowBackWall := true;
|
||
|
|
GraphFrm.ShowModal;
|
||
|
|
end;
|
||
|
|
if plottype = 8 then
|
||
|
|
begin
|
||
|
|
GraphFrm.AutoScale := true;
|
||
|
|
GraphFrm.GraphType := plottype; // 3D Plot
|
||
|
|
GraphFrm.BackColor := clYellow;
|
||
|
|
GraphFrm.WallColor := clBlack;
|
||
|
|
GraphFrm.ShowLeftWall := true;
|
||
|
|
GraphFrm.ShowRightWall := true;
|
||
|
|
GraphFrm.ShowBottomWall := true;
|
||
|
|
GraphFrm.ShowBackWall := true;
|
||
|
|
GraphFrm.ShowModal;
|
||
|
|
end;
|
||
|
|
if plottype = 9 then
|
||
|
|
begin
|
||
|
|
GraphFrm.AutoScale := true;
|
||
|
|
GraphFrm.GraphType := plottype; // 2d Horizontal Bar Chart
|
||
|
|
GraphFrm.BackColor := clYellow;
|
||
|
|
GraphFrm.WallColor := clBlack;
|
||
|
|
GraphFrm.FloorColor := clLtGray;
|
||
|
|
GraphFrm.ShowBackWall := true;
|
||
|
|
GraphFrm.ShowModal;
|
||
|
|
end;
|
||
|
|
if plottype = 10 then
|
||
|
|
begin
|
||
|
|
GraphFrm.AutoScale := true;
|
||
|
|
GraphFrm.GraphType := plottype; // 3d Horizontal Bar Chart
|
||
|
|
GraphFrm.BackColor := clYellow;
|
||
|
|
GraphFrm.WallColor := clBlack;
|
||
|
|
GraphFrm.ShowLeftWall := true;
|
||
|
|
GraphFrm.ShowRightWall := true;
|
||
|
|
GraphFrm.ShowBottomWall := true;
|
||
|
|
GraphFrm.FloorColor := clLtGray;
|
||
|
|
GraphFrm.ShowBackWall := true;
|
||
|
|
GraphFrm.ShowModal;
|
||
|
|
end;
|
||
|
|
GraphFrm.Xpoints := nil;
|
||
|
|
GraphFrm.Ypoints := nil;
|
||
|
|
end; // for novars list
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
XValue := nil;
|
||
|
|
cumfreq := nil;
|
||
|
|
pcntilerank := nil;
|
||
|
|
cumpcnt := nil;
|
||
|
|
pcnt := nil;
|
||
|
|
freq := nil;
|
||
|
|
FreqFrm.Hide;
|
||
|
|
end;
|
||
|
|
|
||
|
|
procedure TFreqFrm.OutBtnClick(Sender: TObject);
|
||
|
|
var
|
||
|
|
index: integer;
|
||
|
|
|
||
|
|
begin
|
||
|
|
index := ListBox1.ItemIndex;
|
||
|
|
VarList.Items.Add(ListBox1.Items.Strings[index]);
|
||
|
|
ListBox1.Items.Delete(index);
|
||
|
|
InBtn.Enabled := true;
|
||
|
|
if ListBox1.Items.Count = 0 then OutBtn.Enabled := false;
|
||
|
|
end;
|
||
|
|
|
||
|
|
initialization
|
||
|
|
{$I frequnit.lrs}
|
||
|
|
|
||
|
|
end.
|
||
|
|
|