# Identify important less frequent words

I have set of newspaper articles. I want to identify important less frequent words in the set of newspaper articles. Currently I am using TF-IDF scores. However, it does not seem to be a good metric in my problem. Is there any better way of doing this?

• @Emre This is a classification of newspaper atricles based on topics. For example sports, crime etc. Iwant to identify the important words to do this. Nov 28 '17 at 3:34