Vector.ArcTan Method

Overload List

#	Signature	Description
1	TMtxVec ArcTan	Inverse tangens.
	└ indexed: TMtxVec ArcTan(Int32 Index, Int32 Len)
2	TMtxVec ArcTan(TMtxVec X)	Calculate the inverse tangens of all X object elements.
	└ indexed: TMtxVec ArcTan(TMtxVec X, Int32 XIndex, Int32 Index, Int32 Len)

Overload 1: TMtxVec ArcTan

Inverse tangens.

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

Remarks:

Calculate the inverse tangens for all calling object elements in-place. The return values are expressed in radians.

Examples

Vector a = new Vector();
a.SetIt(new double[] { 0.0, 0.5, 1.0, 2.0 });
a.ArcTan();
Vector expected = new Vector();
expected.SetIt(new double[] { 0.0, 0.463647609000806, 0.785398163397448, 1.10714871779409 });
if (!a.IsEqual(expected, 1e-10, TCompare.cmpAbsolute))
    throw new Exception("Vector.ArcTan: mismatch");

Vector A;
Vector B;
A.SetIt(2,2,true,[1,0, 2,0
2,0  4,1]);  // 2x2, complex matrix
B.ArcTan(A); // or
B = ArcTan(A);  // or
A = ArcTan(A);

See Also: Vector.Tan, Vector.ArcCot, Vector.ArcTan2

Indexed: TMtxVec ArcTan(Int32 Index, Int32 Len)

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

#	Name	Type	Description
1	Index	Int32	start index
2	Len	Int32	element count

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

Remarks:

An exception is raised if array borders are overrun.

Overload 2: TMtxVec ArcTan(TMtxVec X)

Calculate the inverse tangens of all X object elements.

#	Name	Type	Description
1	X	TMtxVec	source TVec or TMtx

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

Remarks:

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

Examples

Vector a = new Vector();
Vector x = new Vector();
x.SetIt(new double[] { 0.0, 0.5, 1.0, 2.0 });
a.ArcTan(x);
Vector expected = new Vector();
expected.SetIt(new double[] { 0.0, 0.463647609000806, 0.785398163397448, 1.10714871779409 });
if (!a.IsEqual(expected, 1e-10, TCompare.cmpAbsolute))
    throw new Exception("Vector.ArcTan: mismatch");

Indexed: TMtxVec ArcTan(TMtxVec X, Int32 XIndex, Int32 Index, Int32 Len)

Calculate the inverse tangens of X object elements [XIndex]...[XIndex+Len-1].

#	Name	Type	Description
1	X	TMtxVec	source TVec or TMtx
2	XIndex	Int32	X start index
3	Index	Int32	start index
4	Len	Int32	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 Dew.Math.Vector.Complex properties of the calling object must be set explicitly. An exception is raised if array borders are overrun.