Struct NB2Dist 

pub struct NB2Dist {
    pub r: i32,
    pub p: f64,
}

Struct for the negative binomial distribution X ~ NB(r,p) where X = the trial on which the rth success is observed.

Parameters

• r = r,r+1,r+2,...
• p = probability of success (0 < p <= 1)

Support

• x = r,r+1,r+2,...

Example

Suppose X ~ NB(r=4,p=0.2). Use

use ruststat::NB2Dist;
let mut mynb = NB2Dist{r:4, p:0.2};
println!("P(X=6): {}", mynb.pmf(6));
println!("P(X<=6): {}", mynb.cdf(6));
println!("99th percentile: {}", mynb.per(0.99));
println!("Random draw: {}", mynb.ran());
println!("Random vector: {:?}", mynb.ranvec(5));
println!("Mean: {}", mynb.mean());
println!("Variance: {}", mynb.var());
println!("Standard deviation: {}", mynb.sd());

Fields

r: i32

p: f64

Implementations

impl NB2Dist

pub fn pmf(&mut self, x: i32) -> f64

pub fn cdf(&mut self, x: i32) -> f64

pub fn per(&mut self, q: f64) -> i32

pub fn ran(&mut self) -> i32

pub fn ranvec(&mut self, n: i32) -> Vec<i32>

pub fn mean(&mut self) -> f64

pub fn var(&mut self) -> f64

pub fn sd(&mut self) -> f64