Struct rand_simple::LogNormal

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

対数正規分布

使用例

let mut log_normal = rand_simple::LogNormal::new([1192_u32, 765_u32]);
println!("平均値 μ = 0, 分散 σ^2 = 1 の標準対数正規分布乱数を生成する -> {}", log_normal.sample());

// 確率変数のパラメータを変更する場合
let mean: f64 = -3_f64;
let variance: f64 = 2_f64;
let result: Result<(f64, f64), &str> = log_normal.try_set_params(mean, variance);
println!("平均値 μ = {}, 分散 σ^2 = {} の正規分布乱数を生成する -> {}", mean, variance, log_normal.sample());

Implementations§

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impl LogNormal

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pub fn new(seeds: [u32; 2]) -> 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, mean: f64, variance: f64 ) -> Result<(f64, f64), &str>

確率変数のパラメータを変更する

  • mean - 平均
  • variance - 分散

Trait Implementations§

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impl Display for LogNormal

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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
  • 平均
  • 分散

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

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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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default fn to_string(&self) -> String

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

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Performs the conversion.