# Struct rand::distributions::exponential::Exp [−] [src]

    pub struct Exp {
        // some 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`

#### `fn new(lambda: f64) -> Exp`

Construct a new `Exp` with the given shape parameter `lambda`. Panics if `lambda <= 0`.

## Trait Implementations

### `impl Sample<f64> for Exp`

#### `fn sample<R: Rng>(&mut self, rng: &mut R) -> f64`

### `impl IndependentSample<f64> for Exp`

#### `fn ind_sample<R: Rng>(&self, rng: &mut R) -> f64`

### Derived Implementations

### `impl Copy for Exp`

### `impl Clone for Exp`

#### `fn clone(&self) -> Exp`

#### `fn clone_from(&mut self, source: &Self)`1.0.0

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