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  • shoyer · 3 ✖

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  • Add defaults during concat 508 · 3 ✖

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id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
577778006 https://github.com/pydata/xarray/pull/3545#issuecomment-577778006 https://api.github.com/repos/pydata/xarray/issues/3545 MDEyOklzc3VlQ29tbWVudDU3Nzc3ODAwNg== shoyer 1217238 2020-01-23T17:10:48Z 2020-01-23T17:10:48Z MEMBER

Can you explain why you think you need the nested iteration over dataset variables? What ordering are you trying to achieve?

 
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   Add defaults during concat 508 524043729
569845354 https://github.com/pydata/xarray/pull/3545#issuecomment-569845354 https://api.github.com/repos/pydata/xarray/issues/3545 MDEyOklzc3VlQ29tbWVudDU2OTg0NTM1NA== shoyer 1217238 2019-12-31T01:40:02Z 2019-12-31T01:40:02Z MEMBER

I'll take a look at this more carefully soon. But I do think it is a hard requirement that concat runs in linear time (with respect to the total number of variables across all datasets).

On Mon, Dec 30, 2019 at 5:18 PM Scott Chamberlin notifications@github.com wrote:

Hi, I've provided a new update to this PR (sorry it took me awhile both to get more familiar with the code and find the time to update the PR). I improved the logic to be a bit more performant and handle more edge cases as well as updated the test suite. I have a few questions:

  1. The tests I wrote are a bit more verbose than the tests previously. I can tighten them down but I found it was easier for me to read the logic in this form. Please let me know what you prefer.
  2. I'm still not quite sure I've captured all the scenarios as I'm a pretty basic xarray user so please let me know if there is still something I'm missing.

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/pydata/xarray/pull/3545?email_source=notifications&email_token=AAJJFVVSKN5ZWD4FQHPIJG3Q3KMWXA5CNFSM4JOLVICKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEH3RY5Q#issuecomment-569842806, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAJJFVUPKZ7Q3UFVSH7D2STQ3KMWXANCNFSM4JOLVICA . 

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   Add defaults during concat 508 524043729
555299451 https://github.com/pydata/xarray/pull/3545#issuecomment-555299451 https://api.github.com/repos/pydata/xarray/issues/3545 MDEyOklzc3VlQ29tbWVudDU1NTI5OTQ1MQ== shoyer 1217238 2019-11-19T02:12:45Z 2019-11-19T02:12:45Z MEMBER

Thanks for working on this important issue!

There are a lot of edge cases that can come up in concat, so I think it would be very helpful to try to enumerate a broader set of unit tests for thoroughly testing this. For example: - Pre-existing vs non-pre-existing dimension - Pre-existing dimensions of different sizes - Missing data variables vs coordinates vs indexed coordinates

 
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   Add defaults during concat 508 524043729

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