id,node_id,number,state,locked,title,user,body,created_at,updated_at,closed_at,merged_at,merge_commit_sha,assignee,milestone,draft,head,base,author_association,auto_merge,repo,url,merged_by
418478269,MDExOlB1bGxSZXF1ZXN0NDE4NDc4MjY5,4064,closed,0,Auto chunk,56925856,"Adding `chunks='auto'` option to `Dataset.chunk()`. 

 - [x] Closes #4055
 - [x] Tests added in `test_dask.py`
 - [x] Passes `isort -rc . && black . && mypy . && flake8`
 - [x] Updated `whats-new.rst` for changes
",2020-05-15T09:25:13Z,2020-05-25T20:38:53Z,2020-05-25T19:23:45Z,2020-05-25T19:23:45Z,1de38bc7460fd987338a0bfb78d24645dac35663,,,0,98734ef51bbcd8318834392d5f00ab3e31a056bc,3194b3ed1e414729ba6ab6f7f3ed39a425da42b1,CONTRIBUTOR,,13221727,https://github.com/pydata/xarray/pull/4064,
422333184,MDExOlB1bGxSZXF1ZXN0NDIyMzMzMTg0,4089,closed,0,xr.cov() and xr.corr(),56925856,"**PR** for the `xr.cov()` and `xr.corr()` functionality which others have been working on. Most code adapted from @r-beer in PR #3550. 

TODO:
 - [x] ~Write a reasonable set of tests, maybe not using `pandas` as a benchmark? (See https://github.com/pydata/xarray/issues/3784#issuecomment-633145887) Will probably need some help with this~

CHECKLIST:
 - [x] Closes #3784, #3550, #2652, #1115 
 - [x] Tests added
 - [x] Passes `isort -rc . && black . && mypy . && flake8` ~(something wrong with docs though??)~
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API
",2020-05-23T22:09:07Z,2020-05-26T18:31:31Z,2020-05-25T16:55:33Z,2020-05-25T16:55:33Z,3194b3ed1e414729ba6ab6f7f3ed39a425da42b1,,,0,672c87f207147948853e5d8071e1557d203c6e5e,f3ffab7ee4593c97e2ae63f22140d0a823a64b6d,CONTRIBUTOR,,13221727,https://github.com/pydata/xarray/pull/4089,
423354220,MDExOlB1bGxSZXF1ZXN0NDIzMzU0MjIw,4096,closed,0,Corrcov typo fix,56925856,"<!-- Feel free to remove check-list items aren't relevant to your change -->
Fixing typo in recent PR #4089 

 - [x] Closes https://github.com/pydata/xarray/pull/4089#issuecomment-634157768
 - [x] Passes `isort -rc . && black . && mypy . && flake8`",2020-05-26T17:44:07Z,2020-05-27T03:09:37Z,2020-05-26T19:03:25Z,2020-05-26T19:03:25Z,864877c313d026ea5664570741a328324064f77c,,,0,c271fe77760dfe8a97df189b40e559fdb178e243,d1f7cb8fd95d588d3f7a7e90916c25747b90ad5a,CONTRIBUTOR,,13221727,https://github.com/pydata/xarray/pull/4096,
636385276,MDExOlB1bGxSZXF1ZXN0NjM2Mzg1Mjc2,5284,closed,0,Dask-friendly nan check in xr.corr() and xr.cov(),56925856,"Was reading the discussion [here](https://github.com/pydata/xarray/issues/4804) and thought I'd draft a PR to implement some of the changes people suggested. It seems like the main problem is that currently in `computation.py`, `if not valid_values.all()` is not a lazy operation, and so can be a bottleneck for very large dataarrays. To get around this, I've lifted some neat tricks from #4559 so that `valid_values` remains a dask array. 


---

- [x] Closes #4804
- [x] Tests added
- [x] Passes `pre-commit run --all-files`
- [x] User visible changes (including notable bug fixes) are documented in `whats-new.rst`
",2021-05-09T22:06:03Z,2021-05-27T17:31:07Z,2021-05-27T17:31:07Z,2021-05-27T17:31:07Z,3b81a863f6bf96306f90588e4dcef7e54c3af4ea,,,0,ccb5f67b5c8c35e5439a4e7ce1ad69d9400d29da,a6a1e48b57499f91db7e7c15593aadc7930020e8,CONTRIBUTOR,,13221727,https://github.com/pydata/xarray/pull/5284,
655322555,MDExOlB1bGxSZXF1ZXN0NjU1MzIyNTU1,5389,closed,0,ignore this,56925856,"ignore this, I did the branching wrong...",2021-05-27T20:16:22Z,2021-05-27T20:22:43Z,2021-05-27T20:16:45Z,,d024a6e8c313b828166cffde9b1c892455f52438,,,0,dd128c808fe773a48e151d197230bc34501353a3,2a3965c16ad8ab8251b04970336f8b8d41baedb3,CONTRIBUTOR,,13221727,https://github.com/pydata/xarray/pull/5389,
655326238,MDExOlB1bGxSZXF1ZXN0NjU1MzI2MjM4,5390,open,0,Improvements to lazy behaviour of `xr.cov()` and `xr.corr()`,56925856,"Following @willirath 's suggestion in #4804, I've changed https://github.com/pydata/xarray/blob/master/xarray/core/computation.py#L1373_L1375 so that Dask doesn't hold all chunks in memory

- [x] Closes (more of) #4804, specifically [this comment](https://github.com/pydata/xarray/issues/4804#issuecomment-760114285)
- [x] Passes `pre-commit run --all-files`
",2021-05-27T20:22:08Z,2023-12-07T02:25:56Z,,,890645d97daeb8bfef76549c8c527e878475efc5,,,0,a28ea6214e7c70d066d8995d357b8a33c5f3980f,d1e4164f3961d7bbb3eb79037e96cae14f7182f8,CONTRIBUTOR,,13221727,https://github.com/pydata/xarray/pull/5390,