| Functions and CALL Routines |
| Category: | Mathematical |
| Syntax | |
| Arguments | |
| Details | |
| Examples |
Syntax |
| IBESSEL(nu,x,kode) |
specifies a numeric constant, variable, or expression.
| Range: |
nu 0 |
specifies a numeric constant, variable, or expression.
| Range: |
x 0 |
is a numeric constant, variable, or expression that specifies a nonnegative integer.
| Details |
The IBESSEL function returns the value of the modified Bessel function of order nu evaluated at x (Abramowitz, Stegun 1964; Amos, Daniel, Weston 1977). When kode equals 0, the Bessel function is returned. Otherwise, the value of the following function is returned:
![[equation]](images/deqn112.gif)
| Examples |
| SAS Statements | Results |
|---|---|
x=ibessel(2,2,0); |
0.6889484477 |
x=ibessel(2,2,1); |
0.0932390333 |
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