Struct Rng 

pub struct Rng { /* private fields */ }

Pseudo-random number generator (xoshiro256**) with fixed seed.

Implementations

impl Rng

pub fn new(seed: u64) -> Rng

Creates an RNG from seed via SplitMix64 mixing.

pub fn next_u64(&mut self) -> u64

Generates the next 64-bit integer.

pub fn next_f64(&mut self) -> f64

Generates a uniform float in [0, 1).

pub fn uniform(&mut self, lo: f64, hi: f64) -> f64

Generates a uniform float in [lo, hi).

pub fn next_usize(&mut self, n: usize) -> usize

Generates a uniform index in [0, n).

pub fn normal(&mut self) -> f64

Generates a standard normal sample (Box-Muller).

pub fn normal_params(&mut self, mu: f64, sigma: f64) -> f64

Generates a normal sample with parameters (mu, sigma).

pub fn fill_uniform(&mut self, buf: &mut [f64])

Fills buf with uniform values in [0, 1).

pub fn fill_normal(&mut self, buf: &mut [f64])

Fills buf with standard normal values.

pub fn shuffle<T>(&mut self, data: &mut [T])

Shuffles data in place (Fisher-Yates).

pub fn sample_uniform(&mut self, n: usize, lo: f64, hi: f64) -> Vec<f64>

Generates n uniform samples in [lo, hi).

pub fn sample_normal(&mut self, n: usize, mu: f64, sigma: f64) -> Vec<f64>

Generates n normal samples with parameters (mu, sigma).

Trait Implementations

impl Clone for Rng

fn clone(&self) -> Rng

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Rng

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

Formats the value using the given formatter.