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aggregation ops for object-dtype are missing #1866

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fujiisoup opened this issue Jan 30, 2018 · 0 comments · Fixed by #1883
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aggregation ops for object-dtype are missing #1866

fujiisoup opened this issue Jan 30, 2018 · 0 comments · Fixed by #1883
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@fujiisoup
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This issue arises in #1837 comment, where we need to make a summation of object-dtype array, such as

xr.DataArray(np.array([True, True, False, np.nan], dtype=object), dims='x').sum('x', skipna=True)

Currently, it raises NotImplementedError.

pandas support this by having their own nan-aggregation methods.
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Support nan-ops for object-typed arrays fujiisoup/xarray
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@shoyer @fujiisoup