
If the coecient = 0, then it means that the input has no impact on the model that is, 0*x = 0.
This is an important factor because sometimes, especially in the regularization methods, the
coecients are shrunk to zero.
Classification
Classification is required when we are dealing with a discrete output. So in simple words,
whenever you want an answer which deals with a finite or fixed set of results, then you would
require classification. For instance, for a web application to detect spam emails, it is faced with
two likely outcomes; any incoming email can be either authentic or spam. This type of classifica-
tion is also known as binary classi ...