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unit main;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, FileUtil, TAGraph, TASeries, TASources, Forms, Controls,
Graphics, Dialogs, TACustomSource, TATransformations, TAFuncSeries;
type
{ TForm1 }
TForm1 = class(TForm)
Chart1: TChart;
Chart1FitSeries1: TFitSeries;
Chart1LineSeries1: TLineSeries;
ChartAxisTransformations1: TChartAxisTransformations;
ChartAxisTransformations1LogarithmAxisTransform1: TLogarithmAxisTransform;
ListChartSource1: TListChartSource;
ListChartSource2: TListChartSource;
procedure Chart1FitSeries1FitComplete(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ private declarations }
public
{ public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.lfm}
uses
Math;
{ TForm1 }
procedure TForm1.FormCreate(Sender: TObject);
const
MIN = 0;
MAX = 12;
var
i: Integer;
value: double;
begin
for i := MIN to MAX do begin
value := IntPower(10, i);
ListChartSource2.Add(value, value);
end;
end;
procedure TForm1.Chart1FitSeries1FitComplete(Sender: TObject);
begin
{
with Chart1FitSeries1 do
ShowMessage(Format(
'Fit result: a = %.9g, b = %.9g',
[Param[0], Param[1]]
));
}
Chart1.Title.Text.Add(Format(
'The number of transistors doubles every %.0f years',
[ln(2) / Chart1FitSeries1.Param[1]]
));
end;
end.
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