v?Atan

Developer Reference for Intel® oneAPI Math Kernel Library for C

Download PDF

ID 766684

Date 10/31/2024

Version

Public

Visible to Intel only — GUID: GUID-7D66C5B4-935D-4B52-90E1-CE7EEA9B7CA1

View Details

v?Atan

Computes inverse tangent of vector elements.

Syntax

vhAtan( n, a, y );

vhAtanI(n, a, inca, y, incy);

vmhAtan( n, a, y, mode );

vmhAtanI(n, a, inca, y, incy, mode);

vsAtan( n, a, y );

vsAtanI(n, a, inca, y, incy);

vmsAtan( n, a, y, mode );

vmsAtanI(n, a, inca, y, incy, mode);

vdAtan( n, a, y );

vdAtanI(n, a, inca, y, incy);

vmdAtan( n, a, y, mode );

vmdAtanI(n, a, inca, y, incy, mode);

vcAtan( n, a, y );

vcAtanI(n, a, inca, y, incy);

vmcAtan( n, a, y, mode );

vmcAtanI(n, a, inca, y, incy, mode);

vzAtan( n, a, y );

vzAtanI(n, a, inca, y, incy);

vmzAtan( n, a, y, mode );

vmzAtanI(n, a, inca, y, incy, mode);

Include Files

mkl.h

Input Parameters

Name	Type	Description
n	const MKL_INT	Specifies the number of elements to be calculated.
a	const _Float16* for vhAtan, vmhAtan const float* for vsAtan, vmsAtan const double* for vdAtan, vmdAtan const MKL_Complex8* for vcAtan, vmcAtan const MKL_Complex16* for vzAtan, vmzAtan	Pointer to an array that contains the input vector a.
inca, incy	const MKL_INT	Specifies increments for the elements of `a` and `y`.
mode	const MKL_INT64	Overrides global VM mode setting for this function call. See vmlSetMode for possible values and their description.

Output Parameters

Name	Type	Description
y	_Float16* for vhAtan, vmsAtan float* for vsAtan, vmsAtan double* for vdAtan, vmdAtan MKL_Complex8* for vcAtan, vmcAtan MKL_Complex16* for vzAtan, vmzAtan	Pointer to an array that contains the output vector y.

Name

Type

Description

_Float16* for vhAtan, vmsAtan

float* for vsAtan, vmsAtan

double* for vdAtan, vmdAtan

MKL_Complex8* for vcAtan, vmcAtan

MKL_Complex16* for vzAtan, vmzAtan

Pointer to an array that contains the output vector y.

Description

The v?Atan function computes inverse tangent of vector elements.

Special Values for Real Function v?Atan(x)
Argument	Result	Exception
+0	+0
-0	-0
+∞	+`π`/2
-∞	-`π`/2
QNAN	QNAN
SNAN	QNAN	INVALID

Specifications for special values of the complex functions are defined according to the following formula

Atan(z) = -i*Atanh(i*z).

Parent topic: Trigonometric Functions

Select Your Language

Using Intel.com Search

Quick Links

Recent Searches

Advanced Search

Only search in

Developer Reference for Intel® oneAPI Math Kernel Library for C

v?Atan

Syntax

Include Files

Input Parameters

Output Parameters

Description