Changelog for v0.13 (#702)

* Start (slowly) to fill in the changelog

* Use proper links

* 2 out of 3 pages of PRs.

* Move the rayon news

* Complete!

* Address comments

Author: LukeMathWalker

RELEASES.md

@@ -4,22 +4,81 @@ Version 0.13.0 (in development)
 New features
 ------------
 
+ - `ndarray-parallel` is merged into `ndarray`. Use the `rayon` feature-flag to get access to parallel iterators and
+   other parallelized methods.
+   ([#563](https://github.com/rust-ndarray/ndarray/pull/563/files) by [@bluss])
  - Add `logspace` and `geomspace` constructors
-   ([#617](https://github.com/rust-ndarray/ndarray/pull/617) by @JP-Ellis)
- - Implement approx traits for `ArrayBase`
-   ([#581](https://github.com/rust-ndarray/ndarray/pull/581) by @jturner314)
+   ([#617](https://github.com/rust-ndarray/ndarray/pull/617) by [@JP-Ellis])
+ - Implement approx traits for `ArrayBase`. They can be enabled using the `approx` feature-flag.
+   ([#581](https://github.com/rust-ndarray/ndarray/pull/581) by [@jturner314])
+ - Add `mean` method
+   ([#580](https://github.com/rust-ndarray/ndarray/pull/580) by [@LukeMathWalker])
+ - Add `Zip::all` to check if all elements of an iterator satisfy a predicate
+   ([#615](https://github.com/rust-ndarray/ndarray/pull/615) by [@mneumann])
+ - Add `CowArray`, `C`lone `o`n `write` array
+   ([#632](https://github.com/rust-ndarray/ndarray/pull/632) by [@jturner314] and [@andrei-papou])
+ - Add `as_contiguous` to `ArrayBase`: it takes an array by reference and returns a `CoWArray` in standard layout
+   ([#616](https://github.com/rust-ndarray/ndarray/pull/616) by [@jturner314] and [@andrei-papou])
+ - Add `Array2::from_diag` method to create 2D arrays from a diagonal
+   ([#673](https://github.com/rust-ndarray/ndarray/pull/673) by [@rth])
+ - Add `fold` method to `Zip`
+   ([#684](https://github.com/rust-ndarray/ndarray/pull/684) by [@jturner314])
+ - Add `nth_back` method to `ndarray`'s iterators
+   ([#686](https://github.com/rust-ndarray/ndarray/pull/686) by [@jturner314]) 
+ - Add `split_at` method to `AxisChunksIter/Mut`
+   ([#691](https://github.com/rust-ndarray/ndarray/pull/691) by [@jturner314])
+ - Add `into_scalar` method to `ArrayView0` and `ArrayViewMut0`
+   ([#700](https://github.com/rust-ndarray/ndarray/pull/700) by [@LukeMathWalker])
 
 Enhancements
 ------------
+ - Improve performance for matrix multiplications when using the pure-Rust backend thanks to `matrix-multiply:v0.2` 
+   (leverage SIMD instructions on x86-64 with runtime feature detection)
+   ([#556](https://github.com/rust-ndarray/ndarray/pull/556) by [@bluss])
+ - Improve performance of `fold` for iterators
+   ([#574](https://github.com/rust-ndarray/ndarray/pull/574) by [@jturner314])
+ - Improve performance of iterators for 1-d arrays
+   ([#614](https://github.com/rust-ndarray/ndarray/pull/614) by [@andrei-papou])
+ - Better formatting for arrays when using the `Debug` formatter
+   ([#606](https://github.com/rust-ndarray/ndarray/pull/606) by [@andrei-papou] and [@LukeMathWalker])
+ - Arithmetic operations between arrays with different element types are now allowed when there is a scalar equivalent 
+   ([#588](https://github.com/rust-ndarray/ndarray/pull/588) by [@jturner314])
+ - `.map_axis/_mut` won't panic on 0-length `axis`
+   ([#579](https://github.com/rust-ndarray/ndarray/pull/612) by [@andrei-papou]) 
+ - Various documentation improvements (by [@jturner314], [@JP-Ellis])
 
 API changes
 -----------
  - The `into_slice` method on ArrayView is deprecated and renamed to `to_slice`
-   ([#646](https://github.com/rust-ndarray/ndarray/pull/646) by @max-sixty)
+   ([#646](https://github.com/rust-ndarray/ndarray/pull/646) by [@max-sixty])
+ - `RcArray` is deprecated in favour of `ArcArray` 
+   ([#560](https://github.com/rust-ndarray/ndarray/pull/560) by [@bluss])
+ - `into_slice` is renamed to `to_slice`. `into_slice` is now deprecated
+   ([#646](https://github.com/rust-ndarray/ndarray/pull/646) by [@max-sixty])
+ - `from_vec` is deprecated in favour of using the `From` to convert a `Vec` into an `Array`
+   ([#648](https://github.com/rust-ndarray/ndarray/pull/648) by [@max-sixty])
+ - `mean_axis` returns `Option<A>` instead of `A`, to avoid panicking when invoked on a 0-length axis 
+   ([#580](https://github.com/rust-ndarray/ndarray/pull/580) by [@LukeMathWalker])
+ - Remove `rustc-serialize` feature-flag. `serde` is the recommended feature-flag for serialization
+   ([#557](https://github.com/rust-ndarray/ndarray/pull/557) by [@bluss])
+ - `rows`/`cols` are renamed to `nrows`/`ncols`. `rows`/`cols` are now deprecated
+   ([#701](https://github.com/rust-ndarray/ndarray/pull/701) by [@bluss])
 
 Bug fixes
 ---------
-
+ - Prevent overflow when computing strides in `do_slice`
+   ([#575](https://github.com/rust-ndarray/ndarray/pull/575) by [@jturner314])
+ - Fix issue with BLAS matrix-vector multiplication for array with only 1 non-trivial dimension
+   ([#585](https://github.com/rust-ndarray/ndarray/pull/585) by [@sebasv])
+ - Fix offset computation to avoid UB/panic when slicing in some edge cases
+   ([#636](https://github.com/rust-ndarray/ndarray/pull/636) by [@jturner314])
+ - Fix issues with axis iterators
+   ([#669](https://github.com/rust-ndarray/ndarray/pull/669) by [@jturner314])
+
+Other changes
+-------------
+ - Various improvements to `ndarray`'s CI pipeline (`clippy`, `cargo fmt`, etc. by [@max-sixty] and [@termoshtt])
+ 
 
 Version 0.12.1 (2018-11-21)
 ===========================
@@ -796,3 +855,15 @@ Earlier releases
 
   - First release on crates.io
   - Starting point for evolution to come
+ 
+
+[@bluss]: https://github.com/bluss
+[@jturner314]: https://github.com/jturner314
+[@LukeMathWalker]: https://github.com/LukeMathWalker
+[@max-sixty]: https://github.com/max-sixty
+[@JP-Ellis]: https://github.com/JP-Ellis
+[@sebasv]: https://github.com/sebasv
+[@andrei-papou]: https://github.com/sebasv
+[@mneumann]: https://github.com/mneumann
+[@termoshtt]: https://github.com/termoshtt
+[@rth]: https://github.com/rth