function Diag(const Mtx: TMtx; k: Integer): TVec;
Copies the k-th diagonal from the TMtx object.
| # | Name | Type | Description |
|---|---|---|---|
| 1 | Mtx | TMtx | |
| 2 | k | Integer |
Result: stored in self (calling object), returns self for chaining
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
var a: Vector;
d: Matrix;
begin
// setup matrix
d.SetIt(2,2,False,[1,-2,
3, 4]);
// get main diagonal from matrix
a.Diag(d,0); // a now containes [1,4];
end;See Also: Vector.Diag