TF-IDF Scheme

[imsanjoykb]

Term frequency refers to the number of times a word appears in the document and can be calculated as:

Term frequence = (Number of Occurences of a word)/(Total words in the document)
For instance, if we look at sentence S1 from the previous section i.e. "I love rain", every word in the sentence occurs once and therefore has a frequency of 1. On the contrary, for S2 i.e. "rain rain go away", the frequency of "rain" is two while for the rest of the words, it is 1.