Function rgsl::bessel::il_scaled_array

pub fn il_scaled_array(lmax: u32, x: f64, result_array: &mut [f64]) -> Value

This routine computes the values of the scaled regular modified cylindrical Bessel functions \exp(-|x|) i_l(x) for l from 0 to lmax inclusive for lmax >= 0, storing the results in the array result_array. The values are computed using recurrence relations for efficiency, and therefore may differ slightly from the exact values.