Vector.Frac Method

Overload List

#	Signature	Description
1	function Frac: TMtxVec;	Fractional part of values.
	└ indexed: function Frac(Index: Integer; Len: Integer): TMtxVec;
2	function Frac(const X: TMtxVec): TMtxVec;	Calculates the fractional part for all X object values.
	└ indexed: function Frac(const X: TMtxVec; XIndex: Integer; Index: Integer; Len: Integer): TMtxVec;

Overload 1: function Frac: TMtxVec;

Fractional part of values.

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

Remarks:

Calculates the fractional part for all object values in-place.

Examples

var a: Vector;
    ind: Integer;
begin
    a.SetIt(False,[1,5.5,-1.6,6]); // a = [1, 5.5, -1.6, 6]
    a.Frac;  // a = [0, 0.5, -0.6, 0]
end;

var
    a, expected: Vector;
begin
    a := [1.2, 2.7, -0.5, 3.9];
    a.Frac;
    expected := [0.2, 0.7, -0.5, 0.9];
    if not a.IsEqual(expected, 1e-10, TCompare.cmpAbsolute) then
        raise Exception.Create('Vector.Frac: mismatch');
end;

See Also: Vector.Trunc, Vector.Round

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

Calculates the fractional part for 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 or underrun.

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

Calculates the fractional part for all X object values.

#	Name	Type	Description
1	X	TMtxVec

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

Remarks:

Stores the result in calling object. Size and Vector.Complex properties of calling object are adjusted automatically.

Examples

var
    a, x, expected: Vector;
begin
    x := [1.2, 2.7, -0.5, 3.9];
    a.Frac(x);
    expected := [0.2, 0.7, -0.5, 0.9];
    if not a.IsEqual(expected, 1e-10, TCompare.cmpAbsolute) then
        raise Exception.Create('Vector.Frac: mismatch');
end;

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

Calculates the fractional part for X object elements [XIndex]..[XIndex+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:

Stores the result in calling object elements [Index]..[Index+Len-1]. An exception is raised if array borders are overrun or underrun.