Dataset.groupby summary methods · Issue #122 · pydata/xarray (original) (raw)

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) in () 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.