#distribution #discrete #numbers

zipf

A fast generator of discrete, bounded Zipf-distributed random numbers

14 stable releases (7 major)

7.0.2 Feb 8, 2025
7.0.1 Aug 13, 2023
7.0.0 Dec 25, 2020
6.1.0 Oct 22, 2019
0.2.0 Jan 23, 2017

#2706 in Algorithms

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49,550 downloads per month
Used in 18 crates (14 directly)

Apache-2.0

16KB
153 lines

[!CAUTION] This crate is deprecated. Prefer rand_distr::Zipf.


rust-zipf

Crates.io Documentation codecov Dependency status

Rust implementation of a fast, discrete, bounded, Zipf-distributed random number generator. Compared to the implementation provided by randomkit (which binds to NumPy's fork of RandomKit), this crate is approximately twice as fast:

$ cargo +nightly bench
test tests::bench_randomkit ... bench:         339 ns/iter (+/- 18)
test tests::bench_us        ... bench:          68 ns/iter (+/- 1)
test tests::bench_threadrng ... bench:          11 ns/iter (+/- 0)

It is also both driven by, and provides, a Rust random number generator.

This implementation is effectively a direct port of Apache Common's RejectionInversionZipfSampler, written in Java. It is based on the method described by Wolfgang Hörmann and Gerhard Derflinger in Rejection-inversion to generate variates from monotone discrete distributions from ACM Transactions on Modeling and Computer Simulation (TOMACS) 6.3 (1996).

Dependencies

~325KB