# Struct rand_distr::Normal[−][src]

``pub struct Normal<F> where    F: Float,    StandardNormal: Distribution<F>,  { /* fields omitted */ }``
Expand description

The normal distribution `N(mean, std_dev**2)`.

This uses the ZIGNOR variant of the Ziggurat method, see `StandardNormal` for more details.

Note that `StandardNormal` is an optimised implementation for mean 0, and standard deviation 1.

## Example

``````use rand_distr::{Normal, Distribution};

// mean 2, standard deviation 3
let normal = Normal::new(2.0, 3.0).unwrap();
println!("{} is from a N(2, 9) distribution", v)``````

## Implementations

Construct, from mean and standard deviation

Parameters:

• mean (`μ`, unrestricted)
• standard deviation (`σ`, must be finite)

Construct, from mean and coefficient of variation

Parameters:

• mean (`μ`, unrestricted)
• coefficient of variation (`cv = abs(σ / μ)`)

Sample from a z-score

This may be useful for generating correlated samples `x1` and `x2` from two different distributions, as follows.

``````let mut rng = thread_rng();
let z = StandardNormal.sample(&mut rng);
let x1 = Normal::new(0.0, 1.0).unwrap().from_zscore(z);
let x2 = Normal::new(2.0, -3.0).unwrap().from_zscore(z);``````

Returns the mean (`μ`) of the distribution.

Returns the standard deviation (`σ`) of the distribution.

## 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

## 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

Performs the conversion.

Performs the conversion.

The resulting type after obtaining ownership.

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

🔬 This is a nightly-only experimental API. (`toowned_clone_into`)