Matrix.Cos Method

Overload List

#	Signature	Description
1	function Cos: TMtxVec;	Cosine.
	└ indexed: function Cos(Index: Integer; Len: Integer): TMtxVec;
2	function Cos(const X: TMtxVec): TMtxVec;	Calculate the cosine of all X object elements and store the results in the calling object.
	└ indexed: function Cos(const X: TMtxVec; XIndex: Integer; Index: Integer; Len: Integer): TMtxVec;

Overload 1: function Cos: TMtxVec;

Cosine.

Result: stored in self (calling object), returns self for chaining

Remarks:

Calculate the cosine of all caling object elements in-place.

Examples

var a: Matrix;
begin
    a.SetIt(1,2,True,[1,-2,3,4]);
    a.Cos; // Computes complex sine
end;

var
    a, expected: Matrix;
begin
    a := [[0.0, 0.523598775598299], [0.785398163397448, 1.0471975511966]];
    a.Cos;
    expected := [[1.0, 0.866025403784439], [0.707106781186548, 0.5]];
    if not a.IsEqual(expected, 1e-10, TCompare.cmpAbsolute) then
        raise Exception.Create('Matrix.Cos: mismatch');
end;

See Also: Matrix.ArcCos, Matrix.SinCos

Indexed: function Cos(Index: Integer; Len: Integer): TMtxVec;

Calculate the cosine of calling object elements [Index]...[Index+Len-1] in-place.

#	Name	Type	Description
1	Index	Integer	start index
2	Len	Integer	element count

Result: stored in self (calling object), returns self for chaining

Remarks:

An exception is raised if array borders are overrun.

Overload 2: function Cos(const X: TMtxVec): TMtxVec;

Calculate the cosine of all X object elements and store the results in the calling object.

#	Name	Type	Description
1	X	TMtxVec

Result: stored in self (calling object), returns self for chaining

Remarks:

Size and Matrix.Complex properties of calling object are adjusted automatically.

Examples

var
    a, x, expected: Matrix;
begin
    x := [[0.0, 0.523598775598299], [0.785398163397448, 1.0471975511966]];
    a.Cos(x);
    expected := [[1.0, 0.866025403784439], [0.707106781186548, 0.5]];
    if not a.IsEqual(expected, 1e-10, TCompare.cmpAbsolute) then
        raise Exception.Create('Matrix.Cos: mismatch');
end;

Indexed: function Cos(const X: TMtxVec; XIndex: Integer; Index: Integer; Len: Integer): TMtxVec;

Calculate the cosine of X object elements [XIndex]...[XIndex+Len-1]. The results are stored in calling object elements [Index]...[Index+Len-1].

#	Name	Type	Description
1	X	TMtxVec
2	XIndex	Integer	X start index
3	Index	Integer	start index
4	Len	Integer	element count

Result: stored in self (calling object), returns self for chaining

Remarks:

Size and Matrix.Complex properties of calling object and the calling object must be set explicitly. An exception is raised if array borders are overrun.