Your expectation is right, if you randomly assign labels, you shouldn't get more than 50% correct with a large enough dataset. I imagine there is some issue in how you shuffled the labels. Without the code, it is hard to tell. Are you sure the classes have the same size?
On 04/26/2015 11:22 AM, Fabrizio Fasano wrote: > Dear Andreas, > > Thanks a lot for your help, > > about the random assignment of values to my labels y. What I mean is that > being suspicious about the too good performances, I changed the labels > manually, retaining the 50% 1,0 but in different orders, and the labels were > always predicted very well, with accuracy no lower than 60%. I mean, by > chance I aspected values lower than 50% as well as values higher than 50%. I > didn't perform an exhaustive test (I only did it manually for few > combinations)... > > Fabrizio > ------------------------------------------------------------------------------ > One dashboard for servers and applications across Physical-Virtual-Cloud > Widest out-of-the-box monitoring support with 50+ applications > Performance metrics, stats and reports that give you Actionable Insights > Deep dive visibility with transaction tracing using APM Insight. > http://ad.doubleclick.net/ddm/clk/290420510;117567292;y > _______________________________________________ > Scikit-learn-general mailing list > Scikit-learn-general@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Scikit-learn-general mailing list Scikit-learn-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
