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Copy file name to clipboardExpand all lines: README.rst
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@@ -161,7 +161,7 @@ Only columns that are listed in the DataFrameMapper are kept. To keep a column b
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Working with sparse features
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``DataFrameMapper``s will return a dense feature array by default. Setting `sparse=True` in the mapper will return a sparse array whenever any of the extracted features is sparse. Example:
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``DataFrameMapper``s will return a dense feature array by default. Setting ``sparse=True`` in the mapper will return a sparse array whenever any of the extracted features is sparse. Example:
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>>> mapper4 = DataFrameMapper([
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... ('pet', CountVectorizer()),
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Changelog
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0.0.14 (development)
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1.0.0 (2015-11-28)
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* Change version numbering scheme to SemVer.
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* Use ``sklearn.pipeline.Pipeline`` instead of copying its code. Resolves #43.
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* Raise ``KeyError`` when selecting unexistent columns in the dataframe. Fixes #30.
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* Return sparse feature array if any of the features is sparse and ``sparse`` argument is ``True``. Defaults to ``False`` to avoid potential breaking of existing code. Resolves #34.
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