procedure BartlettTest(const Data: TMtx; out NumDim: Integer; const SignifVec: TVec; const Alpha: Double);
Performs the Bartlett test for dimensionality of data.
| # | Name | Description |
|---|---|---|
| 1 | Data | Data to be analyzed. |
| 2 | 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. |
| 3 | SignifVec | Returns calculated significance probabilities for one, two ... variables (dimensions). |
| 4 | Alpha | Desired significance. |
Result: stored in self (calling object)
Examples
procedure BartlettReport;
var NumDim,i: Integer;
SignifVec: Vector;
Data: Matrix;
begin
// Bartlett test for dimensionality
Data.LoadFromFile('c:\temp\data.mtx'); // load test data
BartlettTest(Data,NumDim,SignifVec); // Alpha = 5 %
// returns NumDim and SignifVec
end;See Also: Statistics.PCA