Calculates the Modified Bessel Function of order one. Determines I_1(x) e^(-x) instead of I_1(x) to avoid large argument problems.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| real(kind=SP), | intent(in) | :: | x |
Argument of Modified Bessel Function. |
Returned value of the Bessel Function calculation.