issue_comments: 248345053

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https://github.com/pydata/xarray/issues/873#issuecomment-248345053 https://api.github.com/repos/pydata/xarray/issues/873 248345053 MDEyOklzc3VlQ29tbWVudDI0ODM0NTA1Mw== 1217238 2016-09-20T15:54:02Z 2016-09-20T15:54:02Z MEMBER

GroupBy is working as intended here. ds.groupby('something').apply(func) calls func on objects of the same type as ds. If you group a Dataset, each time you apply to a Dataset, too.

You can certainly still use np.convolve, but you'll need to manually apply it to numpy arrays extracted from a Dataset and then rebuild another Dataset or DataArray.

 
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