Statistics.BartlettTest Function

Performs the Bartlett test for dimensionality of data.

Pascal

procedure BartlettTest(const Data: TMtx; out NumDim: Integer; const SignifVec: TVec; const Alpha: double = 0.05);

File

Statistics

Parameters

Parameters	Description
Data	Data to be analyzed.
NumDim	Returns the number of dimensions needed to explain the non random variation in data. If NumDim is less than zero, the test cannot be applied to this data.
SignifVec	Returns calculated significance probabilities for one, two ... variables (dimensions).
Alpha	Desired significance.

See Also

PCA

Example

procedure BartlettReport;
var NumDim,i: Integer;
  SignifVec: Vector;
  Data: Matrix;
begin
  // Bartlett test for dimensionality
  Data.LoadFromFile('c:tempdata.mtx'); // load test data
  BartlettTest(Data,NumDim,SignifVec); // Alpha = 5 %
  // returns NumDim and SignifVec
end;

#include "MtxVec.hpp"
#include "MtxExpr.hpp"
#include "Statistics.hpp"
void __fastcall Example()
{
  sMatrix data;
  sVector signifVec;
  int numdim;
  data.LoadFromFile("c:\temp\data.mtx"); // load test data
  BartlettTest(data, numdim, signifVec,0.05); // Alpha = 5%
  // returns NumDim and SignifVec
}

Statistics, Functions, Example, See Also

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