Vector::Diag Method

Vector Struct

TVec *Diag(TMtx *Mtx, int k) const;

Copies the k-th diagonal from the TMtx object.

#NameTypeDescription
1MtxTMtx *
2kint
Remarks:

Copies the k-th diagonal from the TMtx object. If k = 0 then the main diagonal is copied, if k < 0 then the subdiagonal is copied and if k > 0 then the k-th super diagonal is copied to the calling vector.

Examples
#include "MtxExpr.h"

using namespace Dew;
using namespace Dew::Math;

void Example()
{
    Vector a;
    Matrix d;

    // setup matrix
    d.SetIt(2, 2, false, DewArray<double>{1, -2, 3, 4});
    // get main diagonal from matrix
    a.Diag(d, 0); // a now containes [1,4];
}
See Also: Vector::Diag
Declared in Dew::Math::Vector · Dew.Math/MtxExpr.h · Cross-compiler