Can I adjust TeeChart's y-axis like this attachment?

[HCLab]

when i have data like attachment image
can i adjust y - axis value like chart below?

i need that the space between value 300 and 800 is displayed rather upper chart than bottom.

TeeChart has some property that i could do?

[Yeray]

Hi HCLab,

The easiest solution could be using a custom axis to separate the two parts. The above with the default left axis and the below part with the custom axis. This could be an example:

Code: Select all

uses series;

procedure TForm1.FormCreate(Sender: TObject);
var i, j: Integer;
begin
  Chart1.View3D := false;

  for i:=0 to 2 do
  begin
    Chart1.AddSeries(TFastLineSeries.Create(self));

    if i <> 2 then
    begin
      Chart1[i].Add(random*300+800);
      for j:=1 to 25 do
        Chart1[i].Add(random*50 + Chart1[i].YValue[j-1] - 25);
    end
    else
      for j:=0 to 25 do
        Chart1[i].Add(200);
  end;

  Chart1.CustomAxes.Add;
  Chart1[2].CustomVertAxis := Chart1.CustomAxes.Items[0];

  Chart1.Axes.Left.EndPosition := 59;
  Chart1.CustomAxes.Items[0].StartPosition := 61;
end;

[HCLab]

Thanks you Yeray.

Im gonna try with it.
Hav nice day :3

[HCLab]

Code: Select all

  Chart1.Axes.Left.EndPosition := 59;
  Chart1.CustomAxes.Items[0].StartPosition := 61;
end;

Thanks for your reply but I cant understand what this codes means ...
Can you Explain what these property means ?
I cant read Teechart Help File on Vista ...

[Yeray]

Hi HCLab,

You can download WinHlp32.exe for Windows Vista from microsoft website to continue viewing hlp files.

Here is what the help says:

property StartPosition: Double;
Unit
TeEngine

Description
Default = 0

The StartPosition property defines the position, as a percentage of Chart width or height (depending on whether it is applied to a Horizontal Axis or a Vertical Axis) of the Start position of the Axis to which it is applied. Left and Top are 0,0 positions.

Use with PositionPercent and EndPosition properties to define the Axis position on a Chart.

property EndPosition: Double;

Unit
TeEngine

Description
Default = 0

The EndPosition property defines the position, as a percentage of Chart width or height (depending on whether it is applied to a Horizontal Axis or a Vertical Axis) of the End position of the Axis to which it is applied. Left and Top are 0,0 positions.

Use with StartPosition and PositionPercent properties to define the Axis position on a Chart.

property PositionPercent: Double;

Unit
TeEngine

Description
Default = 0

The PositionPercent property defines the position, (as a percentage of Chart width or height or as pixels) (depending on whether it is applied to a Horizontal Axis or a Vertical Axis) of the Position of the Axis to which it is applied.
Left and Top axis are at 0,0 positions.

Use with StartPosition and EndPosition properties to define the Axis position on a Chart.

You may use these properties with default and additional Axis, see the example below:

Example - Create a Custom Axis

Code: Select all

//Creates a new Vertical Axis and defines a position for it.

procedure TForm1.BitBtn2Click(Sender: TObject);
Var MyAxis : TChartAxis ;
begin
  MyAxis := TChartAxis.Create(  Chart1 );
  Series2.CustomVertAxis := MyAxis;

  //You can modify any property of the new created axes, such as the axis color or axis title
  With MyAxis do
  begin

    Axis.Color:=clGreen ;
    Title.Caption := 'Extra axis' ;
    Title.Font.Style:=[fsBold];
    Title.Angle := 90;
    PositionPercent := 20; //percentage of Chart rectangle

    StartPosition:=50;
    EndPosition:=100;
  end;
end;

[HCLab]

Thank you very much
It was very useful comment :3