See the coord function in Similarity:
http://lucene.apache.org/java/2_4_1/api/core/org/apache/lucene/search/Similarity.html
-Grant
On Mar 22, 2009, at 9:49 PM, john atsh wrote:
I want to change slightly the similarity function, in the following
way:
Use same cosine similarity as defined by DefaultSimilarity, but
multiply the
result score by f, where f is defined as following
f = (# of terms in query that appear also in document) / (# of terms
in
document)
(this boosts documents that contain RELATIVELY more query terms)
What's the best way to do it, and how?
Thanks
John
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