Pandas DataFrame Categories supported by OneHotEncoder#13351

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maikia wants to merge 3 commits intoscikit-learn:mainfrom

Commits on Mar 1, 2019

ENH: support categorical dtype in OneHotEncoder|OrdinalEncoder
maikia
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check if the dtype is the same of the features passed to fit and to transform. In case of categorical check if corresponding categories are the same
maikia
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removed checking if the dtype is the same iin fit and transform (from previous commit), only checking categories remains
maikia
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