Steema Central

Posted: **Wed Dec 24, 2008 1:50 am**

I am using Delphi and TChart 8.1.

I want to chart a curve fitting for a TFastLineSeries created at runtime.

I do not understand the example since it defines the curve fitting at design time.

Can you point me to an example that does this?

When I try to define:

fitting : TCurveFittingFunction; // This gives Undeclared identifier

Thanks
Kent

Posted: **Wed Dec 24, 2008 8:22 am**

Hi Kent,

First of all please notice that there's v8.04 VCL available at the client area.

Your problem is most likely because you need to add CurvFitt at your unit's uses section:

Code: Select all

uses Series, CurvFitt;

procedure TForm1.FormCreate(Sender: TObject);
var SourceSeries, FunctionSeries: TLineSeries;
begin
  SourceSeries:=TLineSeries.Create(self);
  Chart1.AddSeries(SourceSeries);

  FunctionSeries:=TLineSeries.Create(self);
  Chart1.AddSeries(FunctionSeries);
  FunctionSeries.FunctionType:=TCurveFittingFunction.Create(self);
  FunctionSeries.DataSource:=SourceSeries;

  SourceSeries.FillSampleValues();
end;

Steema Central

How to assign a curve fitting function at runtime

How to assign a curve fitting function at runtime