html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/324#issuecomment-131891348,https://api.github.com/repos/pydata/xarray/issues/324,131891348,MDEyOklzc3VlQ29tbWVudDEzMTg5MTM0OA==,5356122,2015-08-17T17:04:44Z,2015-08-17T17:04:44Z,MEMBER,"For (2) I think it makes sense to extend the existing groupby to deal with multiple dimensions. Ie, let it take an iterable of dimension names. 

```
>>> darray.groupby(['lat', 'lon'])
```

Then we'd have something similar to the [SQL](http://www.w3schools.com/sql/sql_groupby.asp) groupby, which is a good thing.

By the way, in #527 we were considering using this approach to make the faceted plots on both rows and columns.
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