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pub struct Hypergeometric { /* private fields */ }
Expand description

The hypergeometric distribution Hypergeometric(N, K, n).

This is the distribution of successes in samples of size n drawn without replacement from a population of size N containing K success states. It has the density function: f(k) = binomial(K, k) * binomial(N-K, n-k) / binomial(N, n), where binomial(a, b) = a! / (b! * (a - b)!).

The binomial distribution is the analogous distribution for sampling with replacement. It is a good approximation when the population size is much larger than the sample size.

Example

use rand_distr::{Distribution, Hypergeometric};

let hypergeo = Hypergeometric::new(60, 24, 7).unwrap();
let v = hypergeo.sample(&mut rand::thread_rng());
println!("{} is from a hypergeometric distribution", v);

Implementations

Constructs a new Hypergeometric with the shape parameters N = total_population_size, K = population_with_feature, n = sample_size.

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

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

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

Create a distribution of values of ‘S’ by mapping the output of Self through the closure F Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.