Implement user defined aggregations #1483
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jcrist merged 2 commits intodask:masterfrom Aug 19, 2016
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Adds a `reduction` method on `dask.dataframe` objects for applying user defined aggregations. This is a small wrapper around `apply_concat_apply`, with some slight changes to make applying reductions simpler and more intuitive. All use of `_aca_agg` internally has been replaced with this functionality. Fixes dask#1313, supersedes dask#1362.
No longer needed, superseded by `reduction` method.
| If the output of ``chunk`` is a: | ||
| - scalar: Input is a Series, with one row per partition. | ||
| - Series: Input is a DataFrame, with one row per partition. Columns | ||
| are the rows in the output series. |
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Ah, never mind, I now see that this is is aligned with how dataframes handle individual rows.
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Adds a
reductionmethod ondask.dataframeobjects for applying user defined aggregations. This is a small wrapper aroundapply_concat_apply, with some slight changes to make applyingreductions simpler and more intuitive. All use of
_aca_agginternally has been replaced with this functionality.Fixes #1313, supersedes #1362.