v?Atan
v?Atan
Computes inverse
tangent of vector elements.
Syntax
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 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 | 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.Argument | Result | VM
Error Status | Exception |
|---|---|---|---|
+0 | +0 | ||
-0 | -0 | ||
+ ∞ | + π | ||
- ∞ | - π | ||
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)
.