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  • Assigning several variables at once in a dataset · 3 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
457436133 https://github.com/pydata/xarray/issues/1123#issuecomment-457436133 https://api.github.com/repos/pydata/xarray/issues/1123 MDEyOklzc3VlQ29tbWVudDQ1NzQzNjEzMw== stale[bot] 26384082 2019-01-25T02:46:50Z 2019-01-25T02:46:50Z NONE

In order to maintain a list of currently relevant issues, we mark issues as stale after a period of inactivity If this issue remains relevant, please comment here; otherwise it will be marked as closed automatically

 
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   Assigning several variables at once in a dataset 189481649
260755031 https://github.com/pydata/xarray/issues/1123#issuecomment-260755031 https://api.github.com/repos/pydata/xarray/issues/1123 MDEyOklzc3VlQ29tbWVudDI2MDc1NTAzMQ== shoyer 1217238 2016-11-15T20:17:30Z 2016-11-15T20:17:35Z MEMBER

Compare the implementations of Dataset.__getitem__ and __setitem__: https://github.com/pydata/xarray/blob/master/xarray/core/dataset.py#L555-L584

So, this could definitely be made to work. It just isn't something that has been worked on yet.

 
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   Assigning several variables at once in a dataset 189481649
260744511 https://github.com/pydata/xarray/issues/1123#issuecomment-260744511 https://api.github.com/repos/pydata/xarray/issues/1123 MDEyOklzc3VlQ29tbWVudDI2MDc0NDUxMQ== matmel 6333189 2016-11-15T19:40:20Z 2016-11-15T19:40:20Z NONE

Ok, nevermind, I've re-read the documentation and I just checked that I need to use the update method. Thus, the last line should be replaced with:

python ds.update(ds[['varA', 'varB']] - ds[['varA', 'varB']].mean(dim='time'))

and it works as intended.

Probably that the way to assign several variables at once in a Dataset should be emphasized in the documentation with an example.

Thanks.

 
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   Assigning several variables at once in a dataset 189481649

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