Chapter 7 Prepare Your Data For Machine Learning

Question 1

5. DO ALGORITHMS ALWAYS DELIVER BETTER RESULTS WITH PREPROCESSING? P56

Answer 1

Further, when you follow all of the rules and prepare your data, sometimes algorithms can deliver better results without pre-processing.

Question 2

WHEN IS THE NORMALIZING TECHNIQUE IN SCIKITLEARN USED? P59

Answer 2

This preprocessing method can be useful for sparse datasets (lots of zeros) with attributes of varying scales.