This may just be a documentation issue but the summary apply and combine methods for the Dataset.GroupBy object seem to be missing.
In [146]:
foo_values = np.random.RandomState(0).rand(3, 4)
times = pd.date_range('2000-01-01', periods=3)
ds = xray.Dataset({'time': ('time', times),
'foo': (['time', 'space'], foo_values)})
ds.groupby('time').mean() #replace time with time.month after #121 is adressed
# ds.groupby('time').apply(np.mean) # also Errors here
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-146-eec1e73cff23> in <module>()
3 ds = xray.Dataset({'time': ('time', times),
4 'foo': (['time', 'space'], foo_values)})
----> 5 ds.groupby('time').mean()
6 ds.groupby('time').apply(np.mean)
AttributeError: 'DatasetGroupBy' object has no attribute 'mean'
Adding this functionality, if not already present, seems like a really nice addition to the package.
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