Saw it already, the problem is that the coord function gets 2 arguments:
overlap - the number of query terms matched in the document
maxOverlap - the total number of terms in the query
I need to divide overlap by number of terms in the document (rather than
number of terms in query). Any idea how to do this?
Grant Ingersoll-6 wrote:
>
> 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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