Struct rand_distr::Exp

pub struct Exp<N> { /* fields omitted */ }

The exponential distribution Exp(lambda).

This distribution has density function: f(x) = lambda * exp(-lambda * x) for x > 0.

Note that Exp1 is an optimised implementation for lambda = 1.

Example

use rand_distr::{Exp, Distribution};

let exp = Exp::new(2.0).unwrap();
let v = exp.sample(&mut rand::thread_rng());
println!("{} is from a Exp(2) distribution", v);

Methods

impl<N: Float> Exp<N> where
    Exp1: Distribution<N>, 

pub fn new(lambda: N) -> Result<Exp<N>, Error>

Construct a new Exp with the given shape parameter lambda.

Trait Implementations

impl<N: Clone> Clone for Exp<N>

fn clone(&self) -> Exp<N>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<N: Copy> Copy for Exp<N>

impl<N: Debug> Debug for Exp<N>

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<N: Float> Distribution<N> for Exp<N> where
    Exp1: Distribution<N>, 

fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> N

Generate a random value of T, using rng as the source of randomness.

Important traits for DistIter<D, R, T>

impl<D, R, T> Iterator for DistIter<D, R, T> where
    D: Distribution<T>,
    R: Rng,  type Item = T;

fn sample_iter<R>(self, rng: R) -> DistIter<Self, R, T> where
    R: Rng, 

Create an iterator that generates random values of T, using rng as the source of randomness.