TSparseMtx::SparseToBanded Method

TSparseMtx Class

void SparseToBanded(TMtx *Dst, int MaxElemCount = 10000000);

Convert sparse matrix to banded matrix.

#NameTypeDescription
1DstTMtx *
2MaxElemCount = 10000000int
Remarks:

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.

Examples
#include "MtxExpr.h"

using namespace Dew;
using namespace Dew::Math;

void Example()
{
    Vector SubDiag, SupDiag, MainDiag;
    Matrix A;

    SubDiag.Size(4);
    SupDiag.Size(4);
    MainDiag.Size(4);
    A.Size(3, 4);
    A.SubDiag = 1; // one subdiagonal
    A.SuperDiag = 1; // one superdiagonal
    SubDiag.SetIt(DewArray<double>{0, 1, 3, 2});
    SupDiag.SetIt(DewArray<double>{-1, 2, 7, 0});
    MainDiag.SetIt(DewArray<double>{2, 3, 5, 1});
    A.SetRow(SupDiag, 0);
    A.SetRow(MainDiag, 1);
    A.SetRow(SubDiag, 2);
}
#include "MtxExpr.h"
#include "sparse.h"

using namespace Dew;
using namespace Dew::Math;

void Example()
{
    Vector SubDiag, SupDiag, MainDiag;
    Matrix A;
    TSparseMtx* SparseA = new TSparseMtx();

    SubDiag.Size(4);
    SupDiag.Size(4);
    MainDiag.Size(4);
    A.Size(3, 4);
    A.SubDiag = 1; // one subdiagonal
    A.SuperDiag = 1; // one superdiagonal
    SubDiag.SetIt(DewArray<double>{0, 1, 3, 2});
    SupDiag.SetIt(DewArray<double>{-1, 2, 7, 0});
    MainDiag.SetIt(DewArray<double>{2, 3, 5, 1});
    A.SetRow(SupDiag, 0);
    A.SetRow(MainDiag, 1);
    A.SetRow(SubDiag, 2);

    SparseA->BandedToSparse(A);
    delete SparseA;
}
See Also: TSparseMtx::BandedToSparse
Declared in Dew::Math::TSparseMtx · Dew.Math/sparse.h · Cross-compiler