Struct rand_simple::Gamma

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pub struct Gamma { /* private fields */ }
Expand description

ガンマ分布

使用例

let mut gamma = rand_simple::Gamma::new([1192u32, 765u32, 1543u32]);
println!("形状母数 α = 1, 尺度母数 β = 1 の標準ガンマ分布に従う乱数を生成する -> {}", gamma.sample());

// 確率変数のパラメータを変更する場合
let shape: f64 = 2f64;
let scale: f64 = 1.5f64;
let result: Result<(f64, f64), &str> = gamma.try_set_params(shape, scale);
println!("形状母数 α = {}, 尺度母数 β = {} のガンマ分布に従う乱数を生成する -> {}", shape, scale, gamma.sample());

Implementations§

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impl Gamma

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pub fn new(seeds: [u32; 3]) -> Self

コンストラクタ

  • seeds - 乱数の種。同じ値にならないようにコンストラクタ側で調整する。
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pub fn sample(&mut self) -> f64

乱数を計算する

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pub fn try_set_params( &mut self, shape: f64, scale: f64 ) -> Result<(f64, f64), &str>

確率変数のパラメータを変更する

  • shape - 形状母数
  • scale - 尺度母数

Trait Implementations§

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impl Display for Gamma

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

println!マクロなどで表示するためのフォーマッタ

  • 構造体の型
  • 尺度母数

Auto Trait Implementations§

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impl RefUnwindSafe for Gamma

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impl Send for Gamma

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impl Sync for Gamma

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impl Unpin for Gamma

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impl UnwindSafe for Gamma

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToString for Twhere T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.