title: SelectKBest(mutual_info_regression) for classification
body: <p>I am new to feature selection and am not sure whether I understood how to use feature selection for sentiment analysis. Does it make sense to try out SelectKBest(f_classif), SelectKBest(f_regression), SelectKBest(mutuial_info_classif) and SelectKBest(f_info_regression) for a classification problem? I would have thought it does not, only SelectKBest with f_classif and mutual_info_classif.</p>