Question

Explain Feature Engineering, Feature Selection, and PCA using an example in detail.​

Answer 1

Answer:

This is part two of series of getting data ready for modelling . If you have not read part 1 ,then I suggest you go first through it .As feature engineering is the generally the firts step . Once you have sufficient less or no missing data or outlier next come is feature selection or feature extraction . There are generally two approaches. 1 . Feature extraction/selection . 2 . Dimensions reduction or feature reduction