IBESSEL Function

IBESSEL Function

Returns the value of the modified bessel function

Category: Mathematical

Syntax

IBESSEL ( nu , x , kode )

Arguments

nu

• is numeric.

• Range: nu ‰

x

• is numeric.

• Range: x ‰

kode

• is 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:

Examples

SAS Statements	Results
x=ibessel(2,2,0);	0.6889484477
x=ibessel(2,2,1);	0.0932390333