Word Frequencies with TfidfVectorizer #34
Description
An alternative is to calculate word frequencies, and by far the most popular method is called TF-IDF. This is an acronym than stands for “Term Frequency – Inverse Document” Frequency which are the components of the resulting scores assigned to each word.
Term Frequency: This summarizes how often a given word appears within a document.
Inverse Document Frequency: This downscales words that appear a lot across documents.
Without going into the math, TF-IDF are word frequency scores that try to highlight words that are more interesting, e.g. frequent in a document but not across documents.