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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /vendor/rand-0.7.3/src/distributions/pareto.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/rand-0.7.3/src/distributions/pareto.rs')
-rw-r--r-- | vendor/rand-0.7.3/src/distributions/pareto.rs | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/vendor/rand-0.7.3/src/distributions/pareto.rs b/vendor/rand-0.7.3/src/distributions/pareto.rs deleted file mode 100644 index ac5473b8c..000000000 --- a/vendor/rand-0.7.3/src/distributions/pareto.rs +++ /dev/null @@ -1,70 +0,0 @@ -// Copyright 2018 Developers of the Rand project. -// -// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or -// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license -// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your -// option. This file may not be copied, modified, or distributed -// except according to those terms. - -//! The Pareto distribution. -#![allow(deprecated)] - -use crate::distributions::{Distribution, OpenClosed01}; -use crate::Rng; - -/// Samples floating-point numbers according to the Pareto distribution -#[deprecated(since = "0.7.0", note = "moved to rand_distr crate")] -#[derive(Clone, Copy, Debug)] -pub struct Pareto { - scale: f64, - inv_neg_shape: f64, -} - -impl Pareto { - /// Construct a new Pareto distribution with given `scale` and `shape`. - /// - /// In the literature, `scale` is commonly written as x<sub>m</sub> or k and - /// `shape` is often written as α. - /// - /// # Panics - /// - /// `scale` and `shape` have to be non-zero and positive. - pub fn new(scale: f64, shape: f64) -> Pareto { - assert!((scale > 0.) & (shape > 0.)); - Pareto { - scale, - inv_neg_shape: -1.0 / shape, - } - } -} - -impl Distribution<f64> for Pareto { - fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> f64 { - let u: f64 = rng.sample(OpenClosed01); - self.scale * u.powf(self.inv_neg_shape) - } -} - -#[cfg(test)] -mod tests { - use super::Pareto; - use crate::distributions::Distribution; - - #[test] - #[should_panic] - fn invalid() { - Pareto::new(0., 0.); - } - - #[test] - fn sample() { - let scale = 1.0; - let shape = 2.0; - let d = Pareto::new(scale, shape); - let mut rng = crate::test::rng(1); - for _ in 0..1000 { - let r = d.sample(&mut rng); - assert!(r >= scale); - } - } -} |