TSparseMtx.SparseToBanded Method

Summary

Convert sparse matrix to banded matrix.

Declaration

Procedure SparseToBanded(Dst: TMtx; MaxElemCount: integer = 10000000);

Description

Convert calling matrix, stored in HB sparse matrix format, to banded matrix format. The result (banded matrix format) is stored in Dst matrix. The size and complex properties of Dst matrix are adjusted automatically.

See Also
BandedToSparse

Example 1

Step 1: construct banded matrix

          var subDiag, SupDiag,MainDiag: Vector;
          A: Matrix;
          begin
            SubDiag.Size(4);
            SuperDiag.Size(4);
            MainDiag.Size(4);
            A.Size(3,4);
            A.SubDiag := 1; // one subdiagonal
            A.SuperDiag := 1; // one superdiagonal
            SubDiag.SetIt([0,1,3,2]);
            SupDiag.SetIt([-1,2,7,0]);
            MainDiag.SetIt([2,3,5,1]);
            A.SetRow(SupDiag,0);
            A.SetRow(MainDiag,1);
            A.SetRow(SubDiag,2);
          end;

Step 2: convert banded matrix to sparse matrix:

            SparseA.BandedToSparse(A);
          end;