Struct probability::prelude::Gamma

pub struct Gamma {
    // some fields omitted
}

A gamma distribution.

Methods

impl Gamma

fn new(k: f64, theta: f64) -> Gamma

Create a gamma distribution with shape parameter k and scale parameter theta.

It should hold that k > 0 and theta > 0.

fn k(&self) -> f64

Return the shape parameter.

fn theta(&self) -> f64

Return the scale parameter.

Trait Implementations

impl Copy for Gamma

impl Clone for Gamma

fn clone(&self) -> Gamma

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Distribution for Gamma

type Value = f64

The type of outcomes.

fn cdf(&self, x: f64) -> f64

Compute the distribution function.

impl Sample for Gamma

fn sample<S>(&self, source: &mut S) -> f64 where S: Source

Draw a sample.

References

1. G. Marsaglia and W. W. Tsang, “A simple method for generating gamma variables,” ACM Transactions on Mathematical Software, vol. 26, no. 3, pp. 363–372, September 2000.