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Document pandas' better groupby performance. #661

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Nov 17, 2015
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Document pandas' better groupby performance. #661

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4 changes: 3 additions & 1 deletion doc/groupby.rst
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Expand Up @@ -15,7 +15,9 @@ __ http://www.jstatsoft.org/v40/i01/paper

Group by operations work on both :py:class:`~xray.Dataset` and
:py:class:`~xray.DataArray` objects. Currently, you can only group by a single
one-dimensional variable (eventually, we hope to remove this limitation).
one-dimensional variable (eventually, we hope to remove this limitation). Also,
note that for one-dimensional data, it is usually faster to rely on pandas'
implementation of the same pipeline.

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