Function rgsl::randist::chi_squared::chisq

pub fn chisq(r: &mut Rng, nu: f64) -> f64

This function returns a random variate from the chi-squared distribution with nu degrees of freedom. The distribution function is,

p(x) dx = {1 \over 2 Gamma(\nu/2) } (x/2)^{\nu/2 - 1} \exp(-x/2) dx

for x >= 0.