Function helixiser::bessel_utils::bessel_first_max

pub fn bessel_first_max(n: u32) -> f64

get x value of the first maximum of Jn(x) for given n.

Uses tabulated values

Examples

let zero_0 = bessel_first_max(0);

assert_approx_eq!(zero_0, 0.);

let zero_2 = bessel_first_max(2);

assert_approx_eq!(zero_2, 3.054, 0.001);

let zero_2 = bessel_first_max(10);

assert_approx_eq!(zero_2, 11.770, 0.001);