issue_comments: 131878081

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https://github.com/pydata/xarray/issues/324#issuecomment-131878081 https://api.github.com/repos/pydata/xarray/issues/324 131878081 MDEyOklzc3VlQ29tbWVudDEzMTg3ODA4MQ== 2443309 2015-08-17T16:20:14Z 2015-08-17T16:20:14Z MEMBER

Agreed, we have two use cases here.

For (1), can we just use the pandas grouping infrastructure. We just need to allow xray.DataArray.groupby to support an iterable and pandas.Grouper objects. I personally don't like the MultiIndex format and prefer to unstack the grouper operations when possible. In xray, I think we can justify going that route since we support N-D labeled dimensions much better than pandas.

For (2), I'll need to think a bit more about how this would work. Do we add a groupby method to DataArrayGroupBy? That sounds messy. Maybe we need to write a N-D grouper object?

 
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