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Add how=count option to resample #1328

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Add how=count option to resample #1328

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8 changes: 5 additions & 3 deletions xarray/core/common.py
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Original file line number Diff line number Diff line change
Expand Up @@ -565,9 +565,9 @@ def resample(self, freq, dim, how='mean', skipna=None, closed=None,
a function that can be called like ``how(values, axis)`` to reduce
ndarray values along the given axis. Valid choices that can be
provided as a string include all the usual Dataset/DataArray
aggregations (``all``, ``any``, ``argmax``, ``argmin``, ``max``,
``mean``, ``median``, ``min``, ``prod``, ``sum``, ``std`` and
``var``), as well as ``first`` and ``last``.
aggregations (``all``, ``any``, ``argmax``, ``argmin``, ``count``,
``max``, ``mean``, ``median``, ``min``, ``prod``, ``sum``, ``std``
and ``var``), as well as ``first`` and ``last``.
skipna : bool, optional
Whether to skip missing values when aggregating in downsampling.
closed : 'left' or 'right', optional
Expand Down Expand Up @@ -606,6 +606,8 @@ def resample(self, freq, dim, how='mean', skipna=None, closed=None,
f = getattr(gb, how)
if how in ['first', 'last']:
result = f(skipna=skipna, keep_attrs=keep_attrs)
elif how == 'count':
result = f(dim=dim.name, keep_attrs=keep_attrs)
else:
result = f(dim=dim.name, skipna=skipna, keep_attrs=keep_attrs)
else:
Expand Down