Struct rand::distributions::normal::LogNormal

pub struct LogNormal { /* fields omitted */ }

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

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

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

Panics

Panics if std_dev < 0.

Trait Implementations

impl Debug for LogNormal

fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.

impl Copy for LogNormal

impl IndependentSample<f64> for LogNormal

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

Generate a random value.

impl Clone for LogNormal

fn clone(&self) -> LogNormal

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Sample<f64> for LogNormal

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

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