Discussion
Assertion (A) : Inverse document frequency is the logarithm of the reciprocal of the number of documents in a collection that contains a given term.
Reason (R) : Inverse document frequency measure is computed from term frequency and inverse document frequency.
Codes :
Answer: A
The keyed answer is that both statements are true. The inverse document frequency is the logarithm of the reciprocal of the share of documents that contain a given term, and the weighting measure is used together with term frequency.
The reason is loosely worded, since it is the tf-idf measure that is computed from term frequency and inverse document frequency. The official key treats it as true, and the paper followed it.
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