Vector.LogN Method

Overload List

#	Signature	Description
1	function LogN(N: Double): TMtxVec;	Log base N.
	└ indexed: function LogN(N: Double; Index: Integer; Len: Integer): TMtxVec;
2	function LogN(N: Double; X: TMtxVec): TMtxVec;	Calculate the log base N of all X object elements.
	└ indexed: function LogN(N: Double; X: TMtxVec; XIndex: Integer; Index: Integer; Len: Integer): TMtxVec;

Overload 1: function LogN(N: Double): TMtxVec;

Log base N.

#	Name	Type	Description
1	N	Double	scalar

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

Remarks:

Calculate the log base N for all calling object elements in-place.

Examples

var a: Vector;
begin
    a.SetIt(False,[1,2,3,4]); // a = [1,2,3,4]
    a.LogN(10.0);  // log base 10, the slow way a = [Log10(1), Log10(2),...]
end;

See Also: Vector.Power

Indexed: function LogN(N: Double; Index: Integer; Len: Integer): TMtxVec;

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

#	Name	Type	Description
1	N	Double	scalar
2	Index	Integer	start index
3	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 LogN(N: Double; X: TMtxVec): TMtxVec;

Calculate the log base N of all X object elements.

#	Name	Type	Description
1	N	Double	scalar
2	X	TMtxVec	source TVec or TMtx

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

Remarks:

Store the results in calling object. Size and Vector.Complex properties of the calling object are adjusted automatically.

Indexed: function LogN(N: Double; X: TMtxVec; XIndex: Integer; Index: Integer; Len: Integer): TMtxVec;

Calculate the log base N of X object elements [XIndex]..[XIndex+Len-1].

#	Name	Type	Description
1	N	Double	scalar
2	X	TMtxVec	source TVec or TMtx
3	XIndex	Integer	X start index
4	Index	Integer	start index
5	Len	Integer	element count

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

Remarks:

The results are stored in calling object elements [Index]..[Index+Len-1]. Size and Vector.Complex properties of the calling object are not changed. An exception is raised if array borders are overrun.