Document Scoring
TF-IDF Version Document Score
score(q,d)=∑t∈qtf−idf(t,q)∑qi∈qtf−idf2(qi,q)2⋅tf−idf(t,d)∑di∈dtf−idf2(di,d)2score(q,d) = \sum_{t \in q} \frac{tf-idf(t,q)}{\sqrt[2]{\sum_{q_i \in q} tf-idf^2(q_i,q)}} \cdot \frac{tf-idf(t,d)}{\sqrt[2]{\sum_{d_i \in d} tf-idf^2(d_i,d)}} score(q,d)=∑t∈q2∑qi∈qtf−idf2(qi,q)tf−idf(t,q)⋅2∑di∈dtf−idf2(di,d)tf−idf(t,d)
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Speech and Language Processing (3rd ed. draft)
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Data Science
Approximation Version TF-IDF Document Score
