Struct Gamma 

pub struct Gamma { /* private fields */ }

Gamma Distribution

Example

let mut gamma = rand_simple::Gamma::new([1192u32, 765u32, 1543u32]);
assert_eq!(format!("{gamma}"), "Γ(Shape parameter, Scale parameter) = Γ(1, 1)");
println!("Generating a random number following the standard gamma distribution with shape parameter α = 1 and scale parameter β = 1 -> {}", gamma.sample());

// Changing the parameters of the random variable
let shape: f64 = 2f64;
let scale: f64 = 1.5f64;
let result: Result<(f64, f64), &str> = gamma.try_set_params(shape, scale);
assert_eq!(format!("{gamma}"), "Γ(Shape parameter, Scale parameter) = Γ(2, 1.5)");
println!("Generating a random number following the gamma distribution with shape parameter α = {}, and scale parameter β = {} -> {}", shape, scale, gamma.sample());

Implementations

impl Gamma

pub fn new(seeds: [u32; 3]) -> Self

Constructs a new instance of the random number generator.

• seeds - Seeds for the random number generator. Adjusted internally to ensure uniqueness.

pub fn sample(&mut self) -> f64

It computes a random number using the standard gamma distribution.

pub fn try_set_params( &mut self, shape: f64, scale: f64, ) -> Result<(f64, f64), &str>

• shape - Shape parameter
• scale - Scale parameter

Trait Implementations

impl Display for Gamma

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

Formatter for displaying in macros like print!

• Shape parameter
• Scale parameter