issues: 589471115

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
589471115 MDExOlB1bGxSZXF1ZXN0Mzk1MDE3NjEz 3906 Fix for stack+groupby+apply w/ non-increasing coord 6200806 closed 0     4 2020-03-28T00:15:20Z 2020-03-31T18:29:35Z 2020-03-31T16:10:10Z CONTRIBUTOR   0 pydata/xarray/pulls/3906
  • [x] Fixes #3287
  • [x] Tests added
  • [x] Passes isort -rc . && black . && mypy . && flake8
  • [x] Fully documented, including whats-new.rst for all changes and api.rst for new API

I've added a check within groupby.__init__ for monotonicity of the coords, which makes my test pass, but it causes three existing tests to fail. Getting the logic right that properly distinguishes among these different cases is escaping me for now, but it does seem like this call to unique_value_groups within groupby.__init__ is where the re-sorting is occurring. Feedback welcome. TIA!

 
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