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  • Fix name loss when masking · 5 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
462419899 https://github.com/pydata/xarray/pull/2749#issuecomment-462419899 https://api.github.com/repos/pydata/xarray/issues/2749 MDEyOklzc3VlQ29tbWVudDQ2MjQxOTg5OQ== shoyer 1217238 2019-02-11T17:35:07Z 2019-02-11T17:35:07Z MEMBER

thanks Yohai!

 
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   Fix name loss when masking 407523050
462342581 https://github.com/pydata/xarray/pull/2749#issuecomment-462342581 https://api.github.com/repos/pydata/xarray/issues/2749 MDEyOklzc3VlQ29tbWVudDQ2MjM0MjU4MQ== yohai 6164157 2019-02-11T14:17:04Z 2019-02-11T14:17:04Z CONTRIBUTOR

@shoyer your fix works. I think it's ready to merge.

 
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   Fix name loss when masking 407523050
461271787 https://github.com/pydata/xarray/pull/2749#issuecomment-461271787 https://api.github.com/repos/pydata/xarray/issues/2749 MDEyOklzc3VlQ29tbWVudDQ2MTI3MTc4Nw== pep8speaks 24736507 2019-02-07T02:59:48Z 2019-02-11T14:16:13Z NONE

Hello @yohai! Thanks for updating the PR.

Cheers ! There are no PEP8 issues in this Pull Request. :beers:

Comment last updated on February 11, 2019 at 14:16 Hours UTC
 
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   Fix name loss when masking 407523050
461542452 https://github.com/pydata/xarray/pull/2749#issuecomment-461542452 https://api.github.com/repos/pydata/xarray/issues/2749 MDEyOklzc3VlQ29tbWVudDQ2MTU0MjQ1Mg== yohai 6164157 2019-02-07T18:27:41Z 2019-02-07T18:27:41Z CONTRIBUTOR

I agree that my solution is a bit hacky, but from a computational cost viewpoint they are identical (or almost. I don't think there's a way to avoid one if statement per call of where). I thought my solution is good because catching this at a high level captures all possible edge cases that we might miss at lower ones. But I can try to do what you suggested to.

 
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   Fix name loss when masking 407523050
461538356 https://github.com/pydata/xarray/pull/2749#issuecomment-461538356 https://api.github.com/repos/pydata/xarray/issues/2749 MDEyOklzc3VlQ29tbWVudDQ2MTUzODM1Ng== shoyer 1217238 2019-02-07T18:16:03Z 2019-02-07T18:16:03Z MEMBER

This looks fine, though I'd rather fix this at a lower level, if possible.

This line in computation.py sets the name on result DataArray objects: https://github.com/pydata/xarray/blob/0dfc0e63650deb3da1fb1cba48cda88a704c2d60/xarray/core/computation.py#L210

If keep_attrs=True (you'll need to thread the argument into apply_dataarray_ufunc from apply_ufunc), then we should just copy the name from the first argument instead, e.g., name = args[0].name if keep_attrs else result_name(args).

 
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   Fix name loss when masking 407523050

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