Developer Reference for Intel® oneAPI Math Kernel Library for Fortran
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v?i1
Computes the regular modified cylindrical Bessel function of vector elements.
Syntax
call vsi1( n, a, y ) call vsi1i(n, a, inca, y, incy) call vmsi1( n, a, y, mode ) call vmsi1i(n, a, inca, y, incy, mode) call vdi1( n, a, y ) call vdi1i(n, a, inca, y, incy) call vmdi1( n, a, y, mode ) call vmdi1i(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 |
REAL, INTENT(IN) for vsi1, vmsi1 DOUBLE PRECISION, INTENT(IN) for vdi1, vmdi1 |
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 |
REAL, INTENT(OUT) for vsi1, vmsi1 DOUBLE PRECISION, INTENT(OUT) for vdi1, vmdi1 |
Array that specifies the output vector y. |
Description
The I1 function computes the regular modified cylindrical Bessel function of order 1 for elements of the input vector a and writes them to the output vector y.
Argument | Result | VM Error Status | Exception |
---|---|---|---|
+0 | +0 | ||
-0 | +0 | ||
+∞ | +∞ | ||
-∞ | -∞ | ||
QNAN | QNAN | ||
SNAN | QNAN | INVALID |