# Changelog

This file documents recent notable changes to this project. The format of this
file is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and
this project adheres to [Semantic
Versioning](https://semver.org/spec/v2.0.0.html).

## [0.8.0] - 2024-11-01

### Changed

* Updated ndarray to 0.16.1.

## [0.7.0] - 2024-05-20

### Changed

* Updated intel-mkl-src to 0.8.1.
* Requires Rust 1.65 or later.

## [0.6.2] - 2022-05-04

### Fixed

* Fixed conflicts with recent versions of anyhow caused by intel-mkl-src.

## [0.6.1] - 2021-06-14

### Changed

* Requires ndarray 0.15.2 or later.

## [0.6.0] - 2021-05-10

### Changed

* Requires ndarray 0.15.
* `DecompisionError::InvalidInput` provides the underlying reason.
* `DecomposionError::LinalgError` no longer exposes the `ndarray_linalg` error
  type; instead, it provides the underlying reason as `String`.
* Requires Rust 1.51 or later.

## [0.5.1] - 2021-05-06

### Added

* `PcaBuilder` and `RandomizedPcaBuilder` to create instances of `Pca` and
  `RandomizedPca`, respectively.
* `FastIcaBuilder` to create instances of `FastIca`.
* `Pca` and `RandomizedPca` are optionally set to skip mean-centering input,
  using `PcaBuilder::centering` and `RandomizedPcaBuilder::centering`. By
  default they always mean-center input. (by @sstadick)

## [0.5.0] - 2021-05-02

### Changed

* Updated ndarray to 0.14. (by @sstadick)
* The backend features are compatible with those of ndarray-linalg-0.13.
* Requires Rust 1.46 or later.

## [0.4.1] - 2020-07-17

### Added

* `Pca::components()` and `RandomizedPca::components()`.
* `Pca::mean()` and `RandomizedPca::mean()`.
* `Pca::inverse_transform()` and `RandomizedPca::inverse_transform()`.

## [0.4.0] - 2020-06-18

### Added

* Serialization/deserialization using serde.
* `FastIca::with_seed` and `RandomizedPca::with_seed` to easily create a model
  with a reproducible behavior.
* `FastIca::with_rng` and `RandomizedPca::with_rng` to replace `new` in earlier
  versions.

### Changed

* `FastIca::new` and `RandomizedPca::new` no longer requires a random number
  generator; they uses a PCG random number genrator by default. Use `with_rng`
  instead for a different random number generator.

## [0.3.0] - 2020-06-05

### Added

* `FastIca`, an independent component analysis (ICA) algorithm.

## [0.2.0] - 2020-05-24

### Added

* `RandomizedPca`, a randomized, truncated PCA.

### Fixed

* `Pca::explained_variance_ratio` returns the ratios for the principal
  components only.

## [0.1.1] - 2020-05-21

### Added

* cargo features to select the LAPACK backend: intel-mkl, netlib, or openblas.

## [0.1.0] - 2020-05-20

### Added

* Principal component analysis (PCA).

[0.8.0]: https://github.com/petabi/petal-decomposition/compare/0.7.0...0.8.0
[0.7.0]: https://github.com/petabi/petal-decomposition/compare/0.6.2...0.7.0
[0.6.2]: https://github.com/petabi/petal-decomposition/compare/0.6.1...0.6.2
[0.6.1]: https://github.com/petabi/petal-decomposition/compare/0.6.0...0.6.1
[0.6.0]: https://github.com/petabi/petal-decomposition/compare/0.5.1...0.6.0
[0.5.1]: https://github.com/petabi/petal-decomposition/compare/0.5.0...0.5.1
[0.5.0]: https://github.com/petabi/petal-decomposition/compare/0.4.1...0.5.0
[0.4.1]: https://github.com/petabi/petal-decomposition/compare/0.4.0...0.4.1
[0.4.0]: https://github.com/petabi/petal-decomposition/compare/0.3.0...0.4.0
[0.3.0]: https://github.com/petabi/petal-decomposition/compare/0.2.0...0.3.0
[0.2.0]: https://github.com/petabi/petal-decomposition/compare/0.1.1...0.2.0
[0.1.1]: https://github.com/petabi/petal-decomposition/compare/0.1.0...0.1.1
[0.1.0]: https://github.com/petabi/petal-decomposition/tree/0.1.0