TMtx.UpperTriangle Method

Summary

Constructs upper triangular matrix.

Class
TMtx

Declaration

Function UpperTriangle(Mtx: TMtx; ZeroLower, Diagonal: boolean): TMtx;

Description

The method uses Mtx matrix to construct an upper triangular matrix. The results are stored in the calling matrix. If the ZeroLower parameter is true then the calling matrix subdiagonal elements will be set to zero - otherwise the subdiagonal elements will not be initialized. If the Diagonal boolean parameter is true then the Mtx matrix main diagonal elements will be copied to the calling matrix main diagonal elements. If the Diagonal parameter is false, the calling matrix main diagonal elements will be set to zero.

See Also
LowerTriangle

Example 1

      var  A,B: TMtx;
      begin
        CreateIt(A,B);
        A.SetIt(2,1,True,[1,2,
                          2,4]);  // 2x2, not complex matrix
        B.UpperTriangle(A,True,True);
        // B becomes:
        //  [1,2,
        //  [0,4]
        FreeIt(A,B);
      end;