In information retrieval, recall is the fraction of the relevant documents that are successfully retrieved.

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For example, for a text search on a set of documents, recall is the number of correct results divided by the number of results that should have been returned.

In binary classification, recall is called sensitivity. It can be viewed as the probability that a relevant document is retrieved by the query.

It is trivial to achieve recall of 100% by returning all documents in response to any query. Therefore, recall alone is not enough but one needs to measure the number of non-relevant documents also, for example by also computing the precision.

পরিচিতি
Limitations as goals
রিকল
Probabilistic interpretation