Struct PoissonDistribution 

pub struct PoissonDistribution {
    pub rate_parameter: f64,
    pub distribution_name: String,
    pub description: String,
}

Distribution of event counts at a fixed rate.

Fields

rate_parameter: f64

Rate parameter.

distribution_name: String

Unique name identifying a distribution.

description: String

Free-text description.

Trait Implementations

impl Cdf for PoissonDistribution

fn cdf(&self, x: f64) -> f64

Evaluates the cumulative distribution function at x.

impl Clone for PoissonDistribution

fn clone(&self) -> PoissonDistribution

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PoissonDistribution

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

Formats the value using the given formatter.

impl Default for PoissonDistribution

fn default() -> PoissonDistribution

Returns the “default value” for a type.

impl Moments for PoissonDistribution

fn mean(&self) -> Option<f64>

Returns the theoretical mean, or None if it is undefined.

fn variance(&self) -> Option<f64>

Returns the theoretical variance, or None if it is undefined.

impl Pmf for PoissonDistribution

fn pmf(&self, k: i64) -> f64

Evaluates the probability mass function at integer k.

impl Quantile for PoissonDistribution

fn quantile(&self, p: f64) -> f64

Evaluates the quantile (inverse CDF) at probability p.

impl Sample for PoissonDistribution

fn sample(&self, rng: &mut SplitMix64) -> f64

Draws one variate, advancing rng.