TBiPlotSeries Class

Biplot.

Pascal

TBiPlotSeries = class(TPointSeries);

File

StatSeries

Description

Biplots are statistical graphics that represent in the same plane both the variables and the cases. Usualy variables are represented by arrows, while points represent cases. A Biplot can be constructed from a data matrix, where conventionally each column represent a variable, and each row includes the variables value for a given case.

There are several definitions for bi-plot and data matrix. Here are some links:

http://tukey.upf.es/xls-biplot/users-manual/node3.html
http://en.wikipedia.org/wiki/Biplot

Example

var biplot1: TBiplotSeries;
  a: Matrix;
  i: Integer;
begin
  a.Size(5,3,false);
  a.RandGauss;
  biplot1 := TBiPlotSeries.Create(Chart1);
  biplot1.ParentChart := Chart1;
  biplot1.ShowArrows := false; // don't show arrows, only lines
  // plot first two columns for each matrix row
  for i := 0 to a.Rows-1 do biplot1.AddXY(a[i,0],a[i,1],'row '+IntToStr(i));
end;

    sMatrix a;
    a.Size(5,3,false);
    a.RandGauss();
    TBiPlotSeries* biplot1 = new TBiPlotSeries(Chart1);
    biplot1->ParentChart = Chart1;
    biplot1->ShowArrows = false;
    for (int i=0; i < a.Rows; i++)
      biplot1->AddXY(a.Values(i,0),a.Values(i,1),"row "+IntToStr(i));

TBiPlotSeries Properties, TBiPlotSeries Members, StatSeries, Classes, Example

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