Visible to Intel only — GUID: GUID-7D66C5B4-935D-4B52-90E1-CE7EEA9B7CA1
Visible to Intel only — GUID: GUID-7D66C5B4-935D-4B52-90E1-CE7EEA9B7CA1
v?Atan
Computes inverse tangent of vector elements.
Syntax
call vsatan( n, a, y )
call vsatani(n, a, inca, y, incy)
call vmsatan( n, a, y, mode )
call vmsatani(n, a, inca, y, incy, mode)
call vdatan( n, a, y )
call vdatani(n, a, inca, y, incy)
call vmdatan( n, a, y, mode )
call vmdatani(n, a, inca, y, incy, mode)
call vcatan( n, a, y )
call vcatani(n, a, inca, y, incy)
call vmcatan( n, a, y, mode )
call vmcatani(n, a, inca, y, incy, mode)
call vzatan( n, a, y )
call vzatani(n, a, inca, y, incy)
call vmzatan( n, a, y, mode )
call vmzatani(n, a, inca, y, incy, mode)
Include Files
- mkl_vml.f90
Input Parameters
Name |
Type |
Description |
---|---|---|
n |
INTEGER, INTENT(IN) |
Specifies the number of elements to be calculated. |
a |
DOUBLE PRECISION for vdatan, vmdatan COMPLEX for vcatan, vmcatan DOUBLE COMPLEX for vzatan, vmzatan REAL, INTENT(IN) for vsatan, vmsatan DOUBLE PRECISION, INTENT(IN) for vdatan, vmdatan COMPLEX, INTENT(IN) for vcatan, vmcatan DOUBLE COMPLEX, INTENT(IN) for vzatan, vmzatan |
Array that specifies the input vector a. |
inca, incy |
INTEGER, INTENT(IN) |
Specifies increments for the elements of a and y. |
mode |
INTEGER(KIND=8), INTENT(IN) |
Overrides global VM mode setting for this function call. See vmlSetMode for possible values and their description. |
Output Parameters
Name |
Type |
Description |
---|---|---|
y |
DOUBLE PRECISION for vdatan, vmdatan COMPLEX for vcatan, vmcatan DOUBLE COMPLEX for vzatan, vmzatan REAL, INTENT(OUT) for vsatan, vmsatan DOUBLE PRECISION, INTENT(OUT) for vdatan, vmdatan COMPLEX, INTENT(OUT) for vcatan, vmcatan DOUBLE COMPLEX, INTENT(OUT) for vzatan, vmzatan |
Array that specifies 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/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).