Visible to Intel only — GUID: GUID-DDA2489B-F06A-4CDF-81B7-EC9974BD2C8A
Visible to Intel only — GUID: GUID-DDA2489B-F06A-4CDF-81B7-EC9974BD2C8A
v?Atanpi
Computes the inverse tangent of vector elements divided by π.
Syntax
call vsatanpi (n, a, y)
call vsatanpii(n, a, inca, y, incy)
call vmsatanpi (n, a, y, mode)
call vmsatanpii(n, a, inca, y, incy, mode)
call vdatanpi (n, a, y)
call vdatanpii(n, a, inca, y, incy)
call vmdatanpi (n, a, y, mode)
call vmdatanpii(n, a, inca, y, incy, mode)
Include Files
- mkl_vml.f90
Input Parameters
Name |
Type |
Description |
---|---|---|
n |
INTEGER |
Specifies the number of elements to be calculated. |
a |
REAL for vsatanpi REAL for vmsatanpi DOUBLE PRECISION for vdatanpi DOUBLE PRECISION for vmdatanpi |
Pointer to the array containing the input vector a. |
inca, incy |
INTEGER, INTENT(IN) |
Specifies increments for the elements of a and y. |
mode |
INTEGER (KIND=8) |
Overrides the global VM mode setting for this function call. See vmlSetMode for possible values and their description. |
Output Parameters
Name |
Type |
Description |
---|---|---|
y |
REAL for vsatanpi REAL for vmsatanpi DOUBLE PRECISION for vdatanpi DOUBLE PRECISION for vmdatanpi |
Pointer to an array containing the output vector y. |
Description
The v?Atanpi function computes the inverse tangent of vector elements divided by π. For an argument x, the function computes atan(x)/π.
Argument | Result | VM Error Status | Exception |
---|---|---|---|
+0 | +0 | ||
-0 | -0 | ||
+∞ | +1/2 | ||
-∞ | -1/2 | ||
QNAN | QNAN | ||
SNAN | QNAN | INVALID |