Struct rand::distributions::exponential::Exp
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pub struct Exp { /* fields omitted */ }
The exponential distribution Exp(lambda)
.
This distribution has density function: f(x) = lambda * exp(-lambda * x)
for x > 0
.
Example
use rand::distributions::{Exp, IndependentSample}; let exp = Exp::new(2.0); let v = exp.ind_sample(&mut rand::thread_rng()); println!("{} is from a Exp(2) distribution", v);
Methods
impl Exp
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pub fn new(lambda: f64) -> Exp
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Construct a new Exp
with the given shape parameter
lambda
. Panics if lambda <= 0
.
Trait Implementations
impl Debug for Exp
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fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>
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Formats the value using the given formatter. Read more
impl Copy for Exp
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impl IndependentSample<f64> for Exp
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fn ind_sample<R>(&self, rng: &mut R) -> f64 where
R: Rng,
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R: Rng,
Generate a random value.
impl Clone for Exp
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fn clone(&self) -> Exp
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more