Struct rand::distributions::LogNormal

[+] Show declaration

pub struct LogNormal { /* fields omitted */ }

[−] Expand description

The log-normal distribution ln N(mean, std_dev**2).

If X is log-normal distributed, then ln(X) is N(mean, std_dev**2) distributed.

Example

use rand::distributions::{LogNormal, IndependentSample};

// mean 2, standard deviation 3
let log_normal = LogNormal::new(2.0, 3.0);
let v = log_normal.ind_sample(&mut rand::thread_rng());
println!("{} is from an ln N(2, 9) distribution", v)

Methods

impl LogNormal

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pub fn new(mean: f64, std_dev: f64) -> LogNormal

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Construct a new LogNormal distribution with the given mean and standard deviation.

Panics

Panics if std_dev < 0.

Trait Implementations

impl IndependentSample<f64> for LogNormal

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fn ind_sample<R>(&self, rng: &mut R) -> f64 where     R: Rng,

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Generate a random value.

impl Copy for LogNormal

impl Clone for LogNormal

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fn clone(&self) -> LogNormal

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Returns a copy of the value.

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

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Performs copy-assignment from source.

impl Sample<f64> for LogNormal

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fn sample<R>(&mut self, rng: &mut R) -> f64 where     R: Rng,

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

impl Debug for LogNormal

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

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Formats the value using the given formatter.