LazStats: Add missing code to TCorSimForm.Reset. More options in CorSimUnit. General straight-line plotting method.

git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@7785 8e941d3f-bd1b-0410-a28a-d453659cc2b4

applications/lazstats/source/forms/simulations/corsimunit.lfm

@@ -204,26 +204,28 @@ inherited CorSimForm: TCorSimForm
       AnchorSideTop.Control = NumObsEdit
       AnchorSideTop.Side = asrBottom
       Left = 0
-      Height = 90
+      Height = 140
       Top = 148
-      Width = 178
+      Width = 220
       AutoSize = True
       BorderSpacing.Top = 16
       Caption = 'Plot options'
-      ClientHeight = 70
-      ClientWidth = 174
+      ClientHeight = 120
+      ClientWidth = 216
       TabOrder = 6
       object NumBinsEdit: TSpinEdit
         AnchorSideLeft.Control = Label7
         AnchorSideLeft.Side = asrBottom
-        AnchorSideTop.Control = PlotOptionsGroup
+        AnchorSideTop.Control = BinCountChk
+        AnchorSideTop.Side = asrBottom
         Left = 107
         Height = 23
-        Top = 8
+        Top = 85
         Width = 55
         BorderSpacing.Left = 8
-        BorderSpacing.Top = 8
+        BorderSpacing.Top = 4
         BorderSpacing.Right = 12
+        BorderSpacing.Bottom = 12
         MinValue = 2
         OnChange = NumBinsEditChange
         TabOrder = 0
@@ -235,7 +237,7 @@ inherited CorSimForm: TCorSimForm
         AnchorSideTop.Side = asrCenter
         Left = 16
         Height = 15
-        Top = 12
+        Top = 89
         Width = 83
         BorderSpacing.Left = 16
         Caption = 'Number of bins'
@@ -243,18 +245,65 @@ inherited CorSimForm: TCorSimForm
       end
       object BinCountChk: TCheckBox
         AnchorSideLeft.Control = Label7
-        AnchorSideTop.Control = NumBinsEdit
+        AnchorSideTop.Control = OptionsBevel
         AnchorSideTop.Side = asrBottom
         Left = 16
         Height = 19
-        Top = 39
-        Width = 113
+        Top = 62
+        Width = 188
         BorderSpacing.Top = 8
-        BorderSpacing.Bottom = 12
-        Caption = 'Show frequencies'
+        BorderSpacing.Right = 12
+        BorderSpacing.Bottom = 4
+        Caption = 'Show frequencies in histograms'
         OnChange = BinCountChkChange
         TabOrder = 1
       end
+      object RegressionLineChk: TCheckBox
+        AnchorSideLeft.Control = PlotOptionsGroup
+        AnchorSideTop.Control = RegressionResultsChk
+        AnchorSideTop.Side = asrBottom
+        Left = 16
+        Height = 19
+        Top = 27
+        Width = 128
+        BorderSpacing.Left = 16
+        BorderSpacing.Top = 4
+        Caption = 'Show regression line'
+        Checked = True
+        OnChange = RegressionLineChkChange
+        State = cbChecked
+        TabOrder = 2
+      end
+      object OptionsBevel: TBevel
+        AnchorSideLeft.Control = PlotOptionsGroup
+        AnchorSideTop.Control = RegressionLineChk
+        AnchorSideTop.Side = asrBottom
+        AnchorSideRight.Control = PlotOptionsGroup
+        AnchorSideRight.Side = asrBottom
+        Left = 12
+        Height = 8
+        Top = 46
+        Width = 192
+        Anchors = [akTop, akLeft, akRight]
+        BorderSpacing.Left = 12
+        BorderSpacing.Right = 12
+        Shape = bsBottomLine
+      end
+      object RegressionResultsChk: TCheckBox
+        AnchorSideLeft.Control = PlotOptionsGroup
+        AnchorSideTop.Control = PlotOptionsGroup
+        Left = 16
+        Height = 19
+        Top = 4
+        Width = 143
+        BorderSpacing.Left = 16
+        BorderSpacing.Top = 4
+        Caption = 'Show regression results'
+        Checked = True
+        OnChange = RegressionResultsChkChange
+        State = cbChecked
+        TabOrder = 3
+      end
     end
   end
   inherited ParamsSplitter: TSplitter

applications/lazstats/source/forms/simulations/corsimunit.pas

@@ -23,6 +23,9 @@ type
 
   TCorSimForm = class(TBasicStatsReportAndChartForm)
     BinCountChk: TCheckBox;
+    RegressionResultsChk: TCheckBox;
+    OptionsBevel: TBevel;
+    RegressionLineChk: TCheckBox;
     Label7: TLabel;
     PlotOptionsGroup: TGroupBox;
     NumObsEdit: TEdit;
@@ -40,13 +43,15 @@ type
     Label1: TLabel;
     procedure BinCountChkChange(Sender: TObject);
     procedure NumBinsEditChange(Sender: TObject);
+    procedure RegressionLineChkChange(Sender: TObject);
+    procedure RegressionResultsChkChange(Sender: TObject);
   private
     XHistogramChart: TChart;
     YHistogramChart: TChart;
     XHistogramSeries: TChartSeries;
     YHistogramSeries: TChartSeries;
     xValues, yValues: DblDyneVec;
-    simResult: TCorSimResult;
+    SimResult: TCorSimResult;
 
     procedure ChartAfterPaint(Sender: TChart);
     procedure ChartFrameResize(Sender: TObject);
@@ -286,12 +291,23 @@ begin
 end;
 
 
+procedure TCorSimForm.RegressionLineChkChange(Sender: TObject);
+begin
+  if FChartFrame.Chart.SeriesCount > 1 then
+    FChartFrame.Chart.Series[1].Active := RegressionLineChk.Checked;
+end;
+
+procedure TCorSimForm.RegressionResultsChkChange(Sender: TObject);
+begin
+  FChartFrame.Chart.Foot.Visible := RegressionResultsChk.Checked;
+end;
+
+
 procedure TCorSimForm.Plot;
 var
   freqData: DblDyneVec;
   x, mn, mx: Double;
   i, n: Integer;
-  xpts, ypts: DblDyneVec;
 begin
   FChartFrame.Clear;
   XHistogramSeries.Clear;
@@ -306,6 +322,8 @@ begin
     'Y Mean: %.3f, StdDev: %.3f', [
     SimResult.CorrXY, SimResult.XMean, SimResult.XStdDev, SimResult.YMean, SimResult.YStdDev
   ]));
+  FChartFrame.Chart.Foot.Visible := RegressionResultsChk.Checked;
+
   FChartFrame.Chart.Legend.Alignment := laBottomCenter;
   FChartFrame.Chart.Legend.ColumnCount := 2;
 
@@ -323,12 +341,8 @@ begin
   end;
 
   // Draw regression line
-  // Regression line
-  SetLength(xpts, 2);
-  SetLength(yPts, 2);
-  xpts[0] := mn;   ypts[0] := SimResult.a + SimResult.b * xpts[0];
-  xpts[1] := mx;   ypts[1] := SimResult.a + SimResult.b * xpts[1];
-  FChartFrame.PlotXY(ptLines, xpts, ypts, nil, nil, 'Regression line', clBlack);
+  if RegressionLineChk.Checked then
+    FChartFrame.Line(SimResult.a, SimResult.b, mn, mx, 'Regression line', clBlack);
 
   // Draw right histogram
   VecMaxMin(yValues, mx, mn);
@@ -345,6 +359,26 @@ end;
 procedure TCorSimForm.Reset;
 begin
   inherited;
+
+  if Assigned(XHistogramSeries) then
+    XHistogramSeries.Clear;
+  if Assigned(YHistogramSeries) then
+    YHistogramSeries.Clear;
+
+  xValues := nil;
+  yValues := nil;
+
+  with SimResult do
+  begin
+    a := NaN;
+    b := NaN;
+    xMean := NaN;
+    yMean := NaN;
+    xStdDev := NaN;
+    yStdDev := NaN;
+    CorrXY := NaN;
+  end;
+
   MeanXEdit.Text := '100';
   MeanYEdit.Text := '100';
   StdDevXEdit.Text := '15';

applications/lazstats/source/frames/chartframeunit.pas

@@ -54,6 +54,8 @@ type
     procedure GetYRange(out YMin, YMax: Double; Logical: Boolean = true);
     function HorLine(y: Double; AColor: TColor; ALineStyle: TPenStyle;
       ALegendTitle: String): TConstantLine;
+    function Line(a, b, xmin, xmax: Double; LegendTitle: String;
+      AColor: TColor): TLineSeries;
     function PlotXY(AType: TPlotType; x, y: DblDyneVec; xLabels: StrDyneVec;
       yErrorBars: DblDyneVec; LegendTitle: string; AColor: TColor;
       ASymbol: TSeriesPointerStyle = psCircle): TChartSeries;
@@ -157,6 +159,20 @@ begin
 end;
 
 
+function TChartFrame.line(a, b, xmin, xmax: Double; LegendTitle: String;
+  AColor: TColor): TLineSeries;
+var
+  xpts: DblDyneVec = nil;
+  ypts: DblDyneVec = nil;
+begin
+  SetLength(xPts, 2);
+  SetLength(yPts, 2);
+  xpts[0] := xmin;   ypts[0] := a + b * xpts[0];
+  xpts[1] := xmax;   ypts[1] := a + b * xpts[1];
+  Result := TLineSeries(PlotXY(ptLines, xpts, ypts, nil, nil, LegendTitle, AColor))
+end;
+
+
 function TChartFrame.PlotXY(AType: TPlotType; x, y: DblDyneVec; xLabels: StrDyneVec;
   yErrorBars: DblDyneVec; LegendTitle: string; AColor: TColor;
   ASymbol: TSeriesPointerStyle = psCircle): TChartSeries;