TMtxInt::Diag Method

TMtxInt Diag(TVecInt Vec, int k);

Sets the matrix diagonal to values from the vector.

#	Name	Type	Description
1	Vec	TVecInt *
2	k	int

Remarks:

Sets the k-th diagonal of the calling matrix to values from from the Vec object. If k = 0 then the main diagonal matrix is set, if k < 0 then the k-th subdiagonal matrix is set and if k > 0 the then the k-th super diagonal is set. The matrix must be large enough to hold diagonal or an exception is raised.

Examples

#include "MtxVecInt.h"
#include "Units.MtxVecInt.h"

using namespace Dew;
using namespace Dew::Math;
using namespace Dew::Math::Units::MtxVecInt;

void Example()
{
    TMtxInt* A;
    TVecInt* D;

    CreateIt(A);
    CreateIt(D);
    A->SetIt(2, 2, DewArray<int>{1, 1, 1, 2});
    D->SetIt(DewArray<int>{3, 4});
    A->Diag(D, 0);
    // A becomes:
    // [3,1]
    // [1,4]
    FreeIt(D);
    FreeIt(A);
}

See Also: TVecInt::Diag

Declared in Dew::Math::TMtxInt · Dew.Math/MtxVecInt.h · Cross-compiler

TMtxInt *Diag(TVecInt *Vec, int k);

TMtxInt Diag(TVecInt Vec, int k);