Visible to Intel only — GUID: GUID-2ED0238A-11DA-41C7-977C-9545CC767BEA
Visible to Intel only — GUID: GUID-2ED0238A-11DA-41C7-977C-9545CC767BEA
v?Tand
Computes the tangent of vector elements multiplied by π/180.
Syntax
call vstand (n, a, y)
call vstandi(n, a, inca, y, incy)
call vmstand (n, a, y, mode)
call vmstandi(n, a, inca, y, incy, mode)
call vdtand (n, a, y)
call vdtandi(n, a, inca, y, incy)
call vmdtand (n, a, y, mode)
call vmdtandi(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 vstand REAL for vmstand DOUBLE PRECISION for vdtand DOUBLE PRECISION for vmdtand |
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 vstand REAL for vmstand DOUBLE PRECISION for vdtand DOUBLE PRECISION for vmdtand |
Pointer to an array containing the output vector y. |
Description
The v?Tand function computes the tangent of vector elements multiplied by π/180. For an argument x, the function computes tan(π*x/180).
Argument | Result | VM Error Status | Exception |
---|---|---|---|
+0 | +1 | ||
-0 | +1 | ||
±∞ | QNAN | VML_STATUS_ERRDOM | INVALID |
QNAN | QNAN | ||
SNAN | QNAN | INVALID |
The copysign(x, y) function returns the first vector argument x with the sign changed to match that of the second argument y.
Application Notes
If arguments abs(ai) ≤ 2 38 for single precision or abs(ai )≤ 2 67 for double precision, they belong to the fast computational path: arguments for which VM provides the best possible performance. Avoid arguments with do not belong to the fast computational path in VM High Accuracy (HA) or Low Accuracy (LA) functions. For arguments which do not belong to the fast computational path you can use VM Enhanced Performance (EP) functions, which are fast on the entire function domain. However, these functions provide lower accuracy.