This is incredible awesome. Thanks! On Fri, 14 Aug 2015 at 17:54 Jeffrey Blackburne <jblackbu...@gmail.com> wrote:
> If you want to use a tree-based classifier, there is an experimental > branch that can handle categorical feature data. > > https://github.com/scikit-learn/scikit-learn/pull/4899 > > > On Aug 14, 2015, at 7:03 AM, Andreas Mueller <t3k...@gmail.com> wrote: > > > > Why do you think one-hot will be an "explosion"? > > In your example, the vector would be length 8 (if there are values from > a to f, that is, you gave the largest possible sets). > > > > > > On 08/14/2015 09:01 AM, federico vaggi wrote: > >> Hi, > >> > >> Simple example: > >> > >> Let's say that I have a binary classification task, and my input vector > consists of two disjunct sects of categorical variables - something like: > >> > >> X1 = {'a', 'b', 'c', 'd'} and X2 = {'e', 'd', 'b', 'f'} > >> > >> The order within the sets does not matter (obviously), but it matters > that the elements of X1 are conceptually separate from those of X2. > >> > >> All the categorical variables come from the same set. > >> > >> Is there a clever encoding that: > >> > >> - Emphasizes that order within each set does not matter > >> - Avoids explosion with one-hot encoding everything? > >> > >> Federico > >> > >> > >> > ------------------------------------------------------------------------------ > >> > >> > >> > >> _______________________________________________ > >> Scikit-learn-general mailing list > >> > >> Scikit-learn-general@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/scikit-learn-general > > > > > ------------------------------------------------------------------------------ > > _______________________________________________ > > Scikit-learn-general mailing list > > Scikit-learn-general@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general > > > > ------------------------------------------------------------------------------ > _______________________________________________ > Scikit-learn-general mailing list > Scikit-learn-general@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general >
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