Struct statrs::distribution::Poisson [−][src]
Implements the Poisson distribution
Examples
use statrs::distribution::{Poisson, Discrete}; use statrs::statistics::Mean; use statrs::prec; let n = Poisson::new(1.0).unwrap(); assert_eq!(n.mean(), 1.0); assert!(prec::almost_eq(n.pmf(1), 0.367879441171442, 1e-15));
Implementations
impl Poisson
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pub fn new(lambda: f64) -> Result<Poisson>
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Constructs a new poisson distribution with a rate (λ)
of lambda
Errors
Returns an error if lambda
is NaN
or lambda <= 0.0
Examples
use statrs::distribution::Poisson; let mut result = Poisson::new(1.0); assert!(result.is_ok()); result = Poisson::new(0.0); assert!(result.is_err());
pub fn lambda(&self) -> f64
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Returns the rate (λ) of the poisson distribution
Examples
use statrs::distribution::Poisson; let n = Poisson::new(1.0).unwrap(); assert_eq!(n.lambda(), 1.0);
Trait Implementations
impl Clone for Poisson
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impl Copy for Poisson
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impl Debug for Poisson
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impl Discrete<u64, f64> for Poisson
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impl Distribution<f64> for Poisson
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impl Entropy<f64> for Poisson
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impl Max<u64> for Poisson
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impl Mean<f64> for Poisson
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impl Median<f64> for Poisson
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impl Min<u64> for Poisson
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impl Mode<u64> for Poisson
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impl PartialEq<Poisson> for Poisson
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impl Skewness<f64> for Poisson
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impl StructuralPartialEq for Poisson
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impl Univariate<u64, f64> for Poisson
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impl Variance<f64> for Poisson
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Auto Trait Implementations
impl RefUnwindSafe for Poisson
impl Send for Poisson
impl Sync for Poisson
impl Unpin for Poisson
impl UnwindSafe for Poisson
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
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V: MultiLane<T>,