predict_proba or decision_function as estimator “confidence”

Question

I\'m using LogisticRegression as a model to train an estimator in scikit-learn. The features I use are (mostly) categorical; and so are the labels. Therefore, I use a DictVector

Answer 1

As indicated on the question's comments, the error was caused by a bug in the implementation for the version of scikit-learn I was using. The problem was solved updating to the most recent stable version 0.12.1