# Struct rand_distr::Hypergeometric

``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();
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 `!=`.

## 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.