Zend_Search_Lucene_Search_Similarity::tf
Computes a score factor based on a term or phrase's frequency in a document. This value is multiplied by the idf(Term, Searcher) factor for each term in the query and these products are then summed to form the initial score for a document.
Terms and phrases repeated in a document indicate the topic of the document, so implementations of this method usually return larger values when 'freq' is large, and smaller values when 'freq' is small. freq - the frequency of a term within a document Returns a score factor based on a term's within-document frequency
Signature
public function tf(float
$freq )
Parameters
$freq
— float
Returns
- float