Using the sample_weight parameter in the RandomForestClassifier along with the balance_weights method from the preprocessing module to generate the sample weights might work as well.
You can check this link for a previous related discussion. http://sourceforge.net/mailarchive/message.php?msg_id=30460177 -Manish On Feb 25, 2013, at 5:09 AM, Philipp Singer <kill...@gmail.com> wrote: > Hey! > > One simple solution that often works wonders is to set the class_weight > parameter of a classifier (if available) to 'auto' [1]. > > If you have enough data, it often also makes sense to balance the data > beforehand. > > [1] http://scikit-learn.org/dev/modules/svm.html#unbalanced-problems > > Am 25.02.2013 14:02, schrieb Maor Hornstein: >> I'm using scikit-learn in my Python program in order to perform some >> machine-learning operations. The problem is that my data-set has severe >> imbalance issues. >> >> Does anyone know a solution for imbalance in scikit-learn or in python >> in general? >> >> >> Thanks :) >> >> >> >> ------------------------------------------------------------------------------ >> Everyone hates slow websites. So do we. >> Make your web apps faster with AppDynamics >> Download AppDynamics Lite for free today: >> http://p.sf.net/sfu/appdyn_d2d_feb >> >> >> >> _______________________________________________ >> Scikit-learn-general mailing list >> Scikit-learn-general@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/scikit-learn-general >> > > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_d2d_feb > _______________________________________________ > Scikit-learn-general mailing list > Scikit-learn-general@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb _______________________________________________ Scikit-learn-general mailing list Scikit-learn-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
