Talk:Ranking (information retrieval)

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Other Meaning(s)[edit]

Ranking functions also are a tool for proving termination of programs. Here the ranking function maps configurations to a well-founded ordering in such a way that any step of the program will make the value decrease. See Colón & Sipma, Proc. TACAS 2001. PhS (talk) 12:26, 14 July 2010 (UTC)[reply]

This is not about ranking functions[edit]

This page isn't about ranking functions at all; it's about weighting schemes. Cosine similarity is a ranking function. Qwertyus (talk) 09:33, 12 September 2012 (UTC)[reply]

Exactly what made you think that? Article is exteremely light on material, but I think it's in the right general direction. I don't get your "at all" remark. I've always thought of cosine similarity, as more of a distance metric between documents, better suited for things like clustering. Just summing up tf-idfs scores for each query term is as good (or, rather, as bad) a scoring functing as cosine similarity between tf-idf vectors of query and document IMHO. -- X7q (talk) 22:54, 12 September 2012 (UTC)[reply]

This is definitely about information retrieval ranking functions (aka relevance scoring algorithms.) See Manning's text in Information Retrieval "Scoring, term weighting and the vector space model" Elvenhack (talk) 13:46, 19 September 2012 (UTC)[reply]