TFIDF

The TF-IDF scoring function uses the term frequency–inverse document frequency algorithm to sort documents according to their relevance.

Syntax

TFIDF(doc, normalize) → score

doc (document): Specified by FOR ... IN viewName. normalize (bool): Specifies whether scores should be normalized. Default is false.

Examples

This example shows how to search for documents and sort by relevance using the TF-IDF score:

FOR doc IN viewName
  SEARCH ...
  SORT TFIDF(doc) DESC
  RETURN doc

The following example demonstrates how to search for documents and sort by relevance using a normalized TF-IDF score:

FOR doc IN viewName
  SEARCH ...
  SORT TFIDF(doc, true) DESC
  RETURN doc

This example illustrates how to search for documents, sort by the text attribute in ascending order, and then sort by the TFIDF score in descending order where the attribute values are equivalent:

FOR doc IN viewName
  SEARCH ...
  SORT doc.text, TFIDF(doc) DESC
  RETURN doc