Struct rand::distributions::gamma::ChiSquared
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[src]
pub struct ChiSquared {
// some fields omitted
}The chi-squared distribution χ²(k), where k is the degrees of
freedom.
For k > 0 integral, this distribution is the sum of the squares
of k independent standard normal random variables. For other
k, this uses the equivalent characterisation χ²(k) = Gamma(k/2, 2).
Example
use rand::distributions::{ChiSquared, IndependentSample}; let chi = ChiSquared::new(11.0); let v = chi.ind_sample(&mut rand::thread_rng()); println!("{} is from a χ²(11) distribution", v)
Methods
impl ChiSquared
fn new(k: f64) -> ChiSquared
Create a new chi-squared distribution with degrees-of-freedom
k. Panics if k < 0.