Struct rand_distr::Geometric

source ·
pub struct Geometric { /* private fields */ }
Expand description

The geometric distribution Geometric(p) bounded to [0, u64::MAX].

This is the probability distribution of the number of failures before the first success in a series of Bernoulli trials. It has the density function f(k) = (1 - p)^k p for k >= 0, where p is the probability of success on each trial.

This is the discrete analogue of the exponential distribution.

Note that StandardGeometric is an optimised implementation for p = 0.5.

Example

use rand_distr::{Geometric, Distribution};

let geo = Geometric::new(0.25).unwrap();
let v = geo.sample(&mut rand::thread_rng());
println!("{} is from a Geometric(0.25) distribution", v);

Implementations§

Construct a new Geometric with the given shape parameter p (probability of success on each trial).

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
Deserialize this value from the given Serde deserializer. 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 !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more
Serialize this value into the given Serde serializer. Read more

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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.