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LazStats: Some refactoring of RChartUnit.

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git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@7667 8e941d3f-bd1b-0410-a28a-d453659cc2b4
This commit is contained in:
wp_xxyyzz
2020-09-14 10:44:10 +00:00
parent 65f0e63af1
commit 4a4cbb53ab
2 changed files with 62 additions and 50 deletions
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52
applications/lazstats/source/forms/analysis/statistical_process_control/rchartunit.pas
View File

@ -28,14 +28,14 @@ uses
// Constants for correction of standard deviation
const
D3: array[2..25] of double = (
0, 0, 0, 0, 0, 0.076, 0.136, 0.184, 0.223, 0.256, 0.283, 0.307, 0.328,
0.347, 0.363, 0.378, 0.391, 0.403, 0.415, 0.425, 0.434, 0.443,
0.451, 0.459
0, 0, 0, 0, 0, 0.076, 0.136, 0.184, 0.223, // 2..10
0.256, 0.283, 0.307, 0.328, 0.347, 0.363, 0.378, 0.391, 0.403, 0.415, // 11..20
0.425, 0.434, 0.443, 0.451, 0.459 // 21..25
);
D4: array[2..25] of double = (
3.267, 2.574, 2.282, 2.114, 2.004, 1.924, 1.864, 1.816, 1.777,
1.744, 1.717, 1.693, 1.672, 1.653, 1.637, 1.622, 1.608, 1.597,
1.585, 1.575, 1.566, 1.557, 1.548, 1.541
3.267, 2.574, 2.282, 2.114, 2.004, 1.924, 1.864, 1.816, 1.777, // 2..10
1.744, 1.717, 1.693, 1.672, 1.653, 1.637, 1.622, 1.608, 1.597, 1.585, // 11..20
1.575, 1.566, 1.557, 1.548, 1.541 // 21..25
);
procedure TRChartForm.Compute;
@ -50,9 +50,8 @@ var
count: IntDyneVec = nil;
ColNoSelected: IntDyneVec = nil;
X, Xsq, xmin, xmax: Double;
seMean, grandMean, grandRange, grandSD, UCL, LCL: Double;
grandMean, grandRange, grandSD, SEMean, UCL, LCL: Double;
D3Value, D4Value: Double;
sizeError: boolean;
lReport: TStrings;
begin
SetLength(ColNoSelected, 2);
@ -68,10 +67,9 @@ begin
SetLength(count, numGrps);
SetLength(stddev, numGrps);
SetLength(ranges, numGrps);
seMean := 0.0;
grandMean := 0.0;
grandRange := 0.0;
sizeError := false;
grandSD := 0.0;
// Count "good" data points
numValues := 0;
@ -87,7 +85,6 @@ begin
begin
grp := Trim(OS3MainFrm.DataGrid.Cells[GrpVar, i]);
grpIndex := IndexOfString(groups, grp);
if grpIndex = j then
begin
X := StrToFloat(Trim(OS3MainFrm.DataGrid.Cells[MeasVar, i]));
@ -97,8 +94,8 @@ begin
means[grpIndex] := means[grpIndex] + X;
count[grpIndex] := count[grpIndex] + 1;
stddev[grpIndex] := stddev[grpIndex] + Xsq;
seMean := seMean + Xsq;
grandMean := grandMean + X;
grandSD := grandSD + Xsq;
end;
end; // next case
@ -106,12 +103,21 @@ begin
grandRange := grandRange + ranges[j];
grpSize := count[j];
if j = 0 then oldGrpSize := grpSize;
if oldGrpSize <> grpSize then sizeError := true;
if oldGrpSize <> grpSize then
begin
ErrorMsg('All groups must have the same size.');
exit;
end;
end;
if (grpsize < 2) or (grpsize > 25) or sizeError then
if (grpsize < 2) then
begin
ErrorMsg('Group size error.');
ErrorMsg('Groups with at least two values required.');
exit;
end;
if (grpsize > 25) then
begin
ErrorMsg('Groups are too large (max 25).');
exit;
end;
@ -122,11 +128,10 @@ begin
stddev[i] := sqrt(stddev[i]);
means[i] := means[i] / count[i];
end;
seMean := seMean - grandMean * grandMean / numValues;
seMean := seMean / (numValues - 1);
seMean := sqrt(seMean);
GrandSD := seMean;
seMean := seMean / sqrt(numValues);
grandSD := grandSD - sqr(grandMean) / numValues;
grandSD := sqrt(grandSD / (numValues - 1));
SEMean := grandSD / sqrt(numValues);
grandMean := grandMean / numValues;
grandRange := grandRange / numGrps;
D3Value := D3[grpSize];
@ -142,7 +147,7 @@ begin
lReport.Add('Number of values: %8d', [numValues]);
lReport.Add('Grand Mean: %8.3f', [GrandMean]);
lReport.Add('Standard Deviation: %8.3f', [GrandSD]);
lReport.Add('Standard Error of Mean: %8.3f', [semean]);
lReport.Add('Standard Error of Mean: %8.3f', [SEMean]);
lReport.Add('');
lReport.Add('Mean Range: %8.3f', [GrandRange]);
lReport.Add('Lower Control Limit: %8.3f', [LCL]);
@ -158,12 +163,11 @@ begin
lReport.Free;
end;
// show graph
// show graph
// Show graph
PlotMeans(
Format('Range Chart for "%s"', [GetFileName]),
GroupEdit.Text, Format('Range(%s)', [MeasEdit.Text]),
'Group ranges', 'Mean range',
'Group ranges', 'Avg',
groups, ranges,
UCL, LCL, grandRange,
NaN, NaN, NaN

12
applications/lazstats/source/forms/analysis/statistical_process_control/xbarchartunit.pas
View File

@ -107,6 +107,8 @@ var
Cp: Double = NaN;
Cpk: Double = NaN;
Cpm: Double = NaN;
Cpu: Double = NaN;
Cpl: Double = NaN;
ColNoSelected: IntDyneVec = nil;
groups: StrDyneVec = nil;
means: DblDyneVec = nil;
@ -270,7 +272,9 @@ begin
if not IsNaN(upperSpec) and not IsNaN(lowerSpec) then
begin
Cp := (upperSpec - lowerSpec) / (6 * FAveStdDev);
Cpk := Min(UpperSpec - grandMean, grandMean - LowerSpec) / (3 * FAveStdDev);
Cpu := (UpperSpec - grandMean) / (3 * FAveStdDev);
Cpl := (grandMean - LowerSpec) / (3 * FAveStdDev);
Cpk := Min(Cpu, Cpl);
if not IsNaN(targetSpec) then
Cpm := (upperSpec - lowerSpec) / (6 * sqrt(sqr(FAveStdDev) + sqr(grandMean - targetSpec)));
end;
@ -298,9 +302,13 @@ begin
if not IsNaN(lowerSpec) then
lReport.Add('Lower Spec Limit: %8.3f', [lowerSpec]);
if not IsNaN(Cp) then
lReport.Add('Cp: %8.3f', [cp]);
lReport.Add('Cp: %8.3f', [Cp]);
if not IsNaN(Cpk) then
lReport.Add('Cpk: %8.3f', [Cpk]);
if not IsNaN(Cpu) then
lReport.Add('Cpu: %8.3f', [Cpu]);
if not IsNaN(Cpl) then
lReport.Add('Cpl: %8.3f', [Cpl]);
if not IsNaN(Cpm) then
lReport.Add('Cpm: %8.3f', [Cpm]);
lReport.Add('');