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  • Keep index dimension when selecting only a single coord · 6 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
788661534 https://github.com/pydata/xarray/issues/3458#issuecomment-788661534 https://api.github.com/repos/pydata/xarray/issues/3458 MDEyOklzc3VlQ29tbWVudDc4ODY2MTUzNA== cvoivret 7123715 2021-03-02T06:48:08Z 2021-03-02T06:48:08Z NONE

Hi, I'm new to OSS and I would like to take this issue. After some digging, the initial question seems to be related to vectorized indexing. We could add in a code block multiple ways to extract a column (and keep the second dimension) in the beginning of the section. It is rather specific example but, as @dcherian say, it comes up oftten enough. I can make it if the issue still matter.

 
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   Keep index dimension when selecting only a single coord 514077742
557476617 https://github.com/pydata/xarray/issues/3458#issuecomment-557476617 https://api.github.com/repos/pydata/xarray/issues/3458 MDEyOklzc3VlQ29tbWVudDU1NzQ3NjYxNw== NowanIlfideme 2067093 2019-11-22T10:21:08Z 2019-11-22T10:21:08Z NONE

Note that this doesn't work on MultiIndex levels, since vectorized operations on them are not currently supported. Meanwhile, using sel(multiindex_level_name="a") drops the level from the multiindex entirely. The running theme is that this is dependent on #1603, it seems. :)

 
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   Keep index dimension when selecting only a single coord 514077742
547584733 https://github.com/pydata/xarray/issues/3458#issuecomment-547584733 https://api.github.com/repos/pydata/xarray/issues/3458 MDEyOklzc3VlQ29tbWVudDU0NzU4NDczMw== max-sixty 5635139 2019-10-29T19:12:18Z 2019-10-29T19:12:18Z MEMBER

Also example_xr.sel(cols=['idx1']) for the more idiomatic use of dim names

 
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   Keep index dimension when selecting only a single coord 514077742
547577441 https://github.com/pydata/xarray/issues/3458#issuecomment-547577441 https://api.github.com/repos/pydata/xarray/issues/3458 MDEyOklzc3VlQ29tbWVudDU0NzU3NzQ0MQ== ngreenwald 13770365 2019-10-29T18:54:42Z 2019-10-29T18:54:42Z NONE

Great, thanks so much!

On Tue, Oct 29, 2019 at 11:20 AM Deepak Cherian notifications@github.com wrote:

We should add this to the documentation since it comes up often enough.

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   Keep index dimension when selecting only a single coord 514077742
547562690 https://github.com/pydata/xarray/issues/3458#issuecomment-547562690 https://api.github.com/repos/pydata/xarray/issues/3458 MDEyOklzc3VlQ29tbWVudDU0NzU2MjY5MA== dcherian 2448579 2019-10-29T18:20:30Z 2019-10-29T18:20:40Z MEMBER

We should add this as an example in the documentation since it comes up often enough.

 
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   Keep index dimension when selecting only a single coord 514077742
547553455 https://github.com/pydata/xarray/issues/3458#issuecomment-547553455 https://api.github.com/repos/pydata/xarray/issues/3458 MDEyOklzc3VlQ29tbWVudDU0NzU1MzQ1NQ== mathause 10194086 2019-10-29T17:59:19Z 2019-10-29T17:59:19Z MEMBER

I think example_xr.loc[:, ["idx1"]] should do what you want.

 
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   Keep index dimension when selecting only a single coord 514077742

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