Sourced from rand_distr's releases.

0.5.1

What's Changed

• Fix missing import for no_std builds by @​ralphtandetzky in rust-random/rand_distr#13

New Contributors

• @​ralphtandetzky made their first contribution in rust-random/rand_distr#13

Full Changelog: rust-random/rand_distr@0.5.0...0.5.1

0.5.0

Dependencies and features

• Bump the MSRV to 1.61.0 (#1207, #1246, #1269, #1341, #1416); note that 1.60.0 may work for dependents when using --ignore-rust-version
• Update to rand v0.9.0 (#1558)
• Rename feature serde1 to serde (#1477)

API changes

• Make distributions comparable with PartialEq (#1218)
• Dirichlet now uses const generics, which means that its size is required at compile time (#1292)
• The Dirichlet::new_with_size constructor was removed (#1292)
• Add WeightedIndexTree (#1372, #1444)
• Add PertBuilder to allow specification of mean or mode (#1452)
• Rename Zeta's parameter a to s (#1466)
• Mark WeightError, PoissonError, BinomialError as #[non_exhaustive] (#1480)
• Remove support for usage of isize as a WeightedAliasIndex weight (#1487)
• Change parameter type of Zipf::new: n is now floating-point (#1518)

API changes: renames

• Move Slice -> slice::Choose, EmptySlice -> slice::Empty (#1548)
• Rename trait DistString -> SampleString (#1548)
• Rename DistIter -> Iter, DistMap -> Map (#1548)
• Move {Weight, WeightError, WeightedIndex} -> weighted::{Weight, Error, WeightedIndex} (#1548)
• Move weighted_alias::{AliasableWeight, WeightedAliasIndex} -> weighted::{..} (#1548)
• Move weighted_tree::WeightedTreeIndex -> weighted::WeightedTreeIndex (#1548)

Testing

• Add Kolmogorov Smirnov tests for distributions (#1494, #1504, #1525, #1530)

Fixes

• Fix Knuth's method so Poisson doesn't return -1.0 for small lambda (#1284)
• Fix Poisson distribution instantiation so it return an error if lambda is infinite (#1291)
• Fix Dirichlet sample for small alpha values to avoid NaN samples (#1209)
• Fix infinite loop in Binomial distribution (#1325)
• Fix Pert distribution where mode is close to (min + max) / 2 (#1452)
• Fix panic in Binomial (#1484)
• Limit the maximal acceptable lambda for Poisson to solve (#1312) (#1498)
• Fix bug in Hypergeometric, this is a Value-breaking change (#1510)

Other changes

• Remove unused fields from Gamma, NormalInverseGaussian and Zipf distributions (#1184) This breaks serialization compatibility with older versions.

... (truncated)

Sourced from rand_distr's changelog.

[0.6.0] — 2026-02-10

• Bump to MSRV 1.85.0 and Edition 2024 in line with rand (#28)
• Update rand to version 0.10.0 (#31, #48)

Additions

• MultiDistribution trait to sample more efficiently from multi-dimensional distributions (#18)
• Add WeightedAliasIndex::weights() to reconstruct the original weights in O(n) (#25)
• ConstMultiDistribution trait as support for fixed-dimension distributions (#29)

Changes

• Moved Dirichlet into the new multi module and implement MultiDistribution for it (#18)
• Dirichlet no longer uses const generics, which means that its size is not required at compile time. Essentially a revert of [rand#1292]. (#30)

Fixes

• Fix Geometric::new for small p > 0 where 1 - p rounds to 1 (#36)
• Use direct-minimal-versions (#38)
• Fix panic in FisherF::new on almost zero parameters (#39)
• Fix panic in NormalInverseGaussian::new with very large alpha; this is a Value-breaking change (#40)
• Fix hang and debug assertion in Zipf::new on invalid parameters (#41)
• Fix panic in Binomial::sample with n ≥ 2^63; this is a Value-breaking change (#43)
• Error instead of producing -inf output for Exp when lambda is -0.0 (#44)
• Avoid returning NaN from Gamma::sample; this is a Value-breaking change and also affects ChiSquared and Dirichlet (#46)

[0.5.1]

Testing

• Added building the crate to CI

Fixes

• Fix missing import for no_std builds

[0.5.0] - 2025-01-27

Dependencies and features

• Bump the MSRV to 1.61.0 ([rand#1207], [rand#1246], [rand#1269], [rand#1341], [rand#1416]); note that 1.60.0 may work for dependents when using --ignore-rust-version
• Update to rand v0.9.0 ([rand#1558])
• Rename feature serde1 to serde ([rand#1477])

API changes

• Make distributions comparable with PartialEq ([rand#1218])
• Dirichlet now uses const generics, which means that its size is required at compile time ([rand#1292])
• The Dirichlet::new_with_size constructor was removed ([rand#1292])
• Add WeightedIndexTree ([rand#1372], [rand#1444])
• Add PertBuilder to allow specification of mean or mode ([rand#1452])
• Rename Zeta's parameter a to s ([rand#1466])
• Mark WeightError, PoissonError, BinomialError as #[non_exhaustive] ([rand#1480])
• Remove support for usage of isize as a WeightedAliasIndex weight ([rand#1487])
• Change parameter type of Zipf::new: n is now floating-point ([rand#1518])

API changes: renames

... (truncated)

• 61d08aa Update rand 0.10 (#50)
• c97a8f5 Merge pull request #46 from mstoeckl/gamma-avoid-nan
• df52389 Merge pull request #51 from rust-random/push-qyyzynmpkuuo
• 35ecffe CHANGELOG fixes
• 06f586e Merge pull request #48 from mstoeckl/update-rand
• 7540326 Merge pull request #49 from rust-random/push-kzzruutkmsxs
• a101e4e Add PR links to the CHANGELOG
• df2bae8 Update rand dependency to latest rc
• be28239 Merge pull request #41 from mstoeckl/zipf-edge-case
• 9a8000b Avoid hangs and debug asserts on invalid parameters for Zipf
• Additional commits viewable in compare view

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