TMtx.Size Methods

Summary

Sets the size of matrix.

Class
TMtx

Declaration

Function Size(ARows, ACols: integer): TMtx;

Description

Specifies size of a real matrix storing non-integer values.

Declaration

Function Size(ARows, ACols: integer; AComplex: boolean; AIsInteger: boolean = false): TMtx;

Description

Set the calling matrix properties: Rows = ARows,
Cols = ACols
and Complex = AComplex.

If the AComplex parameter is omitted, the default value (matrix is not complex) is used. Calling the Size method does not preserve the contents of the matrix. Use the Resize method, if you want to preserve existing values. NOTE: The Size method performs an out-of-memory safe resize, if the matrix already has memory allocated. This prevents out of memory message for example when redefining the size of the matrix from single column to single row:

      A.Rows := 10000; // matrix size = 0
      A.Cols := 1;     // matrix size = 10000
      // ...
      A.Cols := 10000; // matrix size = 100 000 000 (problems here)
      A.Rows := 1;     // matrix size = 10 000

See Also
Rows
Cols
Complex

Example 1

      var  A: TMtx;
      begin
        CreateIt(A);
        try
          A.Size(2,1,True); // 2x1 complex matrix
          A.SetZero;
          // A becomes:
          // [0,0]
          // [0,0]
        finally
          FreeIt(A);
        end;
      end;