View Single Post
  #5  
Old 06-05-2012, 03:20 PM
marcello marcello is offline
Member
 
Join Date: Apr 2012
Posts: 35
Default Re: Cross validation and data snooping

One thing that makes me really suspicious about scaling non-isotropically on all features is the beaviour of SVM classifiers under Python scikit-learn package.
If I don't scale data, cross-validation is basically useless, cause just a couple of values for the error are generated (how likely is that?!?).

I wonder if it is a package bug, or if there is some countermeasure that should be taken
Reply With Quote