MtxExpr.Sub Method

Overload List

#	Signature	Description
1	function Sub(const X: TMtx; const Y: TMtxVec; const Z: TCplx): Matrix;	Result = X - Y - zScalar, where X is a Matrix
2	function Sub(const X: TMtx; const Y: TMtxVec; const Z: TMtxVec): Matrix;	Result = X - Y - Z, where X is a Matrix
3	function Sub(const X: TMtx; const Y: TMtxVec; const Z: Double): Matrix;	Result = X - Y - zScalar, where X is a Matrix
4	function Sub(const X: TVec; const Y: TMtxVec; const Z: TCplx): Vector;	Result = X - Y - zScalar
5	function Sub(const X: TVec; const Y: TMtxVec; const Z: TMtxVec): Vector;	Result = X - Y - Z
6	function Sub(const X: TVec; const Y: TMtxVec; const Z: Double): Vector;	Result = X - Y - zScalar

Overload 1: function Sub(const X: TMtx; const Y: TMtxVec; const Z: TCplx): Matrix;

Compute X - Y - zScalar, where X is a Matrix.

#	Name	Type
1	X	TMtx
2	Y	TMtxVec
3	Z	TCplx

Returns: Matrix

Overload 2: function Sub(const X: TMtx; const Y: TMtxVec; const Z: TMtxVec): Matrix;

Compute X - Y - Z, where X is a Matrix

#	Name	Type
1	X	TMtx
2	Y	TMtxVec
3	Z	TMtxVec

Returns: Matrix

Overload 3: function Sub(const X: TMtx; const Y: TMtxVec; const Z: Double): Matrix;

Compute X - Y - zScalar, where X is a Matrix.

#	Name	Type
1	X	TMtx
2	Y	TMtxVec
3	Z	Double

Returns: Matrix

Overload 4: function Sub(const X: TVec; const Y: TMtxVec; const Z: TCplx): Vector;

Compute X - Y - zScalar

#	Name	Type
1	X	TVec
2	Y	TMtxVec
3	Z	TCplx

Returns: Vector

Overload 5: function Sub(const X: TVec; const Y: TMtxVec; const Z: TMtxVec): Vector;

Compute X - Y - Z

#	Name	Type
1	X	TVec
2	Y	TMtxVec
3	Z	TMtxVec

Returns: Vector

Remarks:

Computes the difference of three vector-based operands (X, Y, and Z) without creating temporary objects.

Examples

var
    X, Y, Z, A1, A2, A3: Vector;
begin
X := [5, 6, 7, 8];
Y := [1, 2, 3, 4];
Z := [1, 1, 1, 1];
A1 := X - Y - Z;
A2 := Sub(X, Y, Z);
A3.Sub(X, Y, Z);
if not A2.IsEqual(A1) then ERaise('Problem');
if not A3.IsEqual(A1) then ERaise('Problem');
end;

Overload 6: function Sub(const X: TVec; const Y: TMtxVec; const Z: Double): Vector;

Compute X - Y - zScalar

#	Name	Type
1	X	TVec
2	Y	TMtxVec
3	Z	Double

Returns: Vector

Remarks:

Computes the difference between X and Y and then subtracts a scalar zScalar, without creating temporary objects.

Examples

var
    zScalar: Double;
    X, Y, A1, A2, A3: Vector;
begin
zScalar := 3.0;
X := [5, 6, 7, 8];
Y := [1, 2, 3, 4];
A1 := X - Y - zScalar;
A2 := Sub(X, Y, zScalar);
A3.Sub(X, Y, zScalar);
if not A2.IsEqual(A1) then ERaise('Problem');
if not A3.IsEqual(A1) then ERaise('Problem');
end;