[scikit-learn] [Feature] drop_one in one hot encoder

Gael Varoquaux gael.varoquaux at normalesup.org
Sun Jun 25 13:01:10 EDT 2017

On Sun, Jun 25, 2017 at 05:18:09PM +0530, Parminder Singh wrote:
> Hy Sci-kittens! :-)

Nice :).

FYI: there is work in progress to replace the OneHotEncoder, as it has
many strong limitations:

It might be useful to have a look at this PR to make sure that it solves
the various use cases.


> I was doing machine learning a-z course on Udemy, there they told that
> every time one-hot encoding is done, one of the columns should be dropped
> as it is like doubling same category twice and redundant to model. I
> thought if instead of having user find the index and drop it after
> preprocessing, OneHotEncoder had a drop_one variable, and it automatically
> removed the last column. What are your thoughts about this? I am new to
> this community, would like to contribute this myself if it is possible
> addition.

> Thanks,
> Trion129
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    Gael Varoquaux
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