Class TMatrix

The indices of a matrix of the class TMatrix are counted starting at 1 up to NrOfRows, or NrOfColumns respectively. In order to use TMatrix the user has first to create one or several matrices (instances of class TMatrix ) by calling the method Create. If a matrix is not needed anymore, it should be removed from the memory by calling the method Free. The individual elements of a matrix are represented by the property Elem. Most of the matrix operations are available via methods.

The matrix can be manipulated using the following properties and methods:

Properties DataID Elem NrOfColumns NrOfRows Precision Events OnCalcDistance OnChange OnPercentDone OnSortExchange

Methods Add CalcDistMat CalcHatMatrix Changed CholeskyDecomp Clone CopyColTo1DArray CopyColToVec CopyFrom CopyFrom1DArray CopyFrom2DArray CopyFromVec CopyRowTo1DArray CopyRowToVec CopyTo2DArray Correlate CountValues CRCofData Create Determinant Dichotomize Diff DistanceOfObjects DuplicateDataAsArray EdgeVector EMult ExchangeColumns ExchangeRows ExportAsASC Fill FillDiag

FillRandomNormal FillRandomUniform FillSerial Find FindInSortedColumn Free GeometricMean HarmonicMean Histogram ImportASC Invert LoadBinary LoadFromFile LoadFromStream LoadFromXMLFile LUdecomposition MakeValidColRange MakeValidRowRange MeanCenterColumns MeanCenterRows MeanVar MeanVec MinMax MirrorColumns MirrorRows Multiply MultiplyTransposed MultiplyVector Norm Percentile QNormalizeColumns

QNormalizeRows Quartiles ReadBinaryHeader ReadFromOpenXMLFile ReadFromXMLStream RemoveColumn RemoveRow ResampleExtMat Resize ResizeAndClear SAdd SaveAsXMLFile SaveBinary SaveToStream SkewKurt SkewKurtSample SMult SortCols SortRows Square StandardizeColumns StandardizeRows StoreOnFile Subtract Sum Trace Transpose TransposeAndMultiplyMatrix TransposeAndMultiplyVector WriteToOpenXMLFile WriteToXMLStream

The following code snippet shows a very simple sample application: a square matrix (Mat1) of 27 elements is created and filled with a constant value for the diagonal elements of 1.0, with all other elements being set to zero values. At the end of the program the matrix is destroyed.

const
  MatCols = 40;             { size of the matrix }
  MatRows = 27;

var
  Mat1    : TMatrix;

begin
Mat1 := TMatrix.Create (nil);
Mat1.Resize (MatCols, MatRows);
    { here comes your code to
      process the matrix Mat1 }
Mat1.Free;
end;