Topic Modeling, Natural Language Process.
the importance of a word in a collection of documents. And here comes the Term Frequency-Inverse Document Frequency (TF-IDF). Mathematically, TF-IDF is equal to the product of term frequency and inverse document frequency. TF-IDF(t, d) = TF(t, d) * IDF(t) For term frequency TF(t, d), the simplest