bow1 8.X TF-IDF In this lecture, we will learn about TF-IDF. As we learned in last lecture, Vector Space Model (aka Bag-of-Words) works as below. A document (datapoint) is a vector of counts over each word (feature) Vd is just a histogram over words. n( · ) counts the number of occurences. What is the similarity between two documents? We can use any distance but the cosine distance is fast. But not all words ar.. 2020. 7. 31. 이전 1 다음
