Feature Engineering Made Easy

Feature transformation – enter math-man

This chapter is where things get mathematical and interesting. We'll have talked about understating features and cleaning them. We'll also have looked at how to remove and add new features. In our feature construction chapter, we had to manually create these new features. We, the human, had to use our brains and come up with those three ways of decomposing that image of a stop sign. Sure, we can create code that makes the features automatically, but we ultimately chose what features we wanted to use. 

This chapter will start to look at the automatic creation of these features as it applies to mathematical dimensionality. If we regard our data as vectors in an n-space (n being the number of columns), ...