Jan K questions

Jan K answers

• How to apply standardization to train and test datasets
• How to compute accuracy and the confusion matrix using K-fold cross-validation?
• SelectKBest for regression gives "unknown label type"-error
• Using Boosting tree to generate feature in sklearn
• How to specify positive label when use precision as scoring in GridSearchCV
• Feature selection on a keras model
• Understanding decision_function values
• Scikit-learn pipeline TypeError: zip argument #2 must support iteration
• ValueError: Found input variables with inconsistent numbers of samples: [2750, 1095]
• Confused with the return result of TfidfVectorizer.fit_transform