That won't work, as it is modifying the number of samples, which breaks the scikit-learn pipeline.
Please add this usecase in the PR on the scikit-learn enhancement proposal that discusses a possible modification to scikit-learn: https://github.com/scikit-learn/enhancement_proposals/pull/2 Cheers, Gaël On Fri, Feb 19, 2016 at 11:36:29AM -0500, Sebastian Raschka wrote: > Hi, Stelios, > I am wondering, how did you implement this tweak? Just a thought, but instead > of adding extra functionality inside the GridSearch class, what about using a > random training data selector (transformer) as a pipeline object? Something > along the lines of > class RandomRowSelector(object): > def __init__(self): > pass > def _some_random_sampling_function(self, X, y) > def transform(self, X, y): > sampled_rows = self.some_random_sampling_function(self, X, y) > return X[sampled_rows, :], y[sampled_rows, :] > def fit(self, X, y=None): > return self > Best, > Sebastian > > On Feb 19, 2016, at 7:56 AM, Stylianos Kampakis > > <stylianos.kampa...@gmail.com> wrote: > > Hi everyone, > > I was thinking to implement a tweak where it is possible to sample randomly > > from a dataset when using grid search. This would particularly useful for > > big datasets. The sampling takes place during each round of grid search. > > Does anyone think this would be worthy submitting to scikit-learn? > > Best regards, > > Stelios > > ------------------------------------------------------------------------------ > > Site24x7 APM Insight: Get Deep Visibility into Application Performance > > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > > Monitor end-to-end web transactions and take corrective actions now > > Troubleshoot faster and improve end-user experience. Signup Now! > > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140_______________________________________________ > > Scikit-learn-general mailing list > > Scikit-learn-general@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > _______________________________________________ > Scikit-learn-general mailing list > Scikit-learn-general@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general -- Gael Varoquaux Researcher, INRIA Parietal NeuroSpin/CEA Saclay , Bat 145, 91191 Gif-sur-Yvette France Phone: ++ 33-1-69-08-79-68 http://gael-varoquaux.info http://twitter.com/GaelVaroquaux ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Scikit-learn-general mailing list Scikit-learn-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
