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unit Main;
{$mode objfpc}{$H+}
interface
uses
ComCtrls, ExtCtrls, Spin, StdCtrls, Forms, TAGraph, TASeries, TASources,
Classes;
type
{ TForm1 }
TForm1 = class(TForm)
cbAccDirDerivative: TComboBox;
ccsDerivative: TCalculatedChartSource;
cbCumulative: TCheckBox;
ccsAvg: TCalculatedChartSource;
ccsSum: TCalculatedChartSource;
Chart1: TChart;
Chart1BarSeries1: TBarSeries;
Chart1LineSeries1: TLineSeries;
chDerivativeLineOrig: TLineSeries;
chDerivativeLineDeriv: TLineSeries;
Chart1LineSeries4: TLineSeries;
Chart1LineSeries5: TLineSeries;
Chart2: TChart;
Chart2AreaSeries1: TAreaSeries;
Chart2LineSeries1: TLineSeries;
chDerivative: TChart;
chCalc: TChart;
chCalcLineSeries1: TLineSeries;
chCalcLineSeriesAvg: TLineSeries;
chCalcLineSeriesSum: TLineSeries;
cbAccDirStatistics: TComboBox;
cbSmooth: TCheckBox;
seAccumulationRange: TSpinEdit;
lblAccumulationRange: TLabel;
ListChartSource1: TListChartSource;
lcsDerivative: TListChartSource;
Memo1: TMemo;
PageControl1: TPageControl;
Panel1: TPanel;
Panel2: TPanel;
rgDataShape: TRadioGroup;
RandomChartSource1: TRandomChartSource;
RandomChartSource2: TRandomChartSource;
Splitter1: TSplitter;
tsDerivative: TTabSheet;
tsStatistics: TTabSheet;
tsBasic: TTabSheet;
procedure cbAccDirDerivativeChange(Sender: TObject);
procedure cbAccDirStatisticsChange(Sender: TObject);
procedure cbCumulativeChange(Sender: TObject);
procedure cbSmoothChange(Sender: TObject);
procedure CreateData;
procedure seAccumulationRangeChange(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure rgDataShapeClick(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.lfm}
uses
Math;
{ TForm1 }
procedure TForm1.cbAccDirDerivativeChange(Sender: TObject);
begin
ccsDerivative.AccumulationDirection :=
TChartAccumulationDirection(cbAccDirDerivative.ItemIndex);
end;
procedure TForm1.cbAccDirStatisticsChange(Sender: TObject);
begin
ccsAvg.AccumulationDirection :=
TChartAccumulationDirection(cbAccDirStatistics.ItemIndex);
ccsSum.AccumulationDirection := ccsAvg.AccumulationDirection;
end;
procedure TForm1.cbCumulativeChange(Sender: TObject);
begin
chCalcLineSeriesSum.Active := cbCumulative.Checked;
end;
procedure TForm1.cbSmoothChange(Sender: TObject);
begin
if cbSmooth.Checked then
ccsDerivative.AccumulationMethod := camSmoothDerivative
else
ccsDerivative.AccumulationMethod := camDerivative;
end;
procedure TForm1.CreateData;
const
N = 100;
MIN_X = -10;
MAX_X = 10;
EPS = 1e-6;
var
i: Integer;
x, y: Double;
begin
lcsDerivative.Clear;
if rgDataShape.ItemIndex = 6 then
for i := 0 to 9 do
lcsDerivative.Add(i - IfThen(i > 6, 1, 0), i)
else
for i := 0 to N - 1 do begin
x := MIN_X + (MAX_X - MIN_X) / (N - 1) * i;
if SameValue(x, 0.0, EPS) then x := 0;
case rgDataShape.ItemIndex of
0: y := x;
1: y := Sin(x);
2: if x = 0 then y := 1 else y := Sin(x) / x;
3: y := Exp(-x / 3);
4: y := Exp(-Sqr((x - 2.5) / 2.5));
5: y := Exp(-Sqr((x - 2.5) / 2.5)) + 0.05 * (Random - 0.5);
end;
lcsDerivative.Add(x, y);
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
Randomize;
CreateData;
end;
procedure TForm1.rgDataShapeClick(Sender: TObject);
begin
CreateData;
end;
procedure TForm1.seAccumulationRangeChange(Sender: TObject);
begin
ccsDerivative.AccumulationRange := seAccumulationRange.Value;
end;
end.
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