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Posted to dev@lucene.apache.org by Sajid Khan <as...@yahoo.co.in> on 2006/12/04 13:24:28 UTC
Regarding adding one more factor in lucene scoring formula
Hi all,
I need to add one more factor(like tf, idf .....) in the lucene
scoring formula. But i am not getting any idea of where should i update the
code in Lucene.
Can anybody please help me to solve the problem?
Ragards
Sajid Khan
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Re: Regarding adding one more factor in lucene scoring formula
Posted by Sajid Khan <as...@yahoo.co.in>.
Hi Grant
Thanks for the instant reply.
Actually, there are two parts of the problem I'm trying to solve:
1) I want to show the results which contain the exact query phrase on
top followed by results containing all the terms in the query but the
terms are not in the same sequence as the query.
This means the result will be ordered as
(exact match) followed by (results for ANDed query terms)
2) When the query terms are scattered far from each other, I want to
give such results a low ranking. This is the formula I'm using:
If the query is "A B C", I want to calculate the minimum
distance in word count between 'A and B' say x, 'B and C' say y, 'C and A'
say z. Then to calculate
distanceWeight = (1/x) * (1/y) * (1/z),
Hence, this value will be calculated and incorporated into
lucene's scoring formula for each of the results (or maybe only top 1000
results) within the ANDed result set.
Thanks in advance for all your help.
regards
Sajid Khan
Grant Ingersoll-6 wrote:
>
> http://lucene.apache.org/java/docs/scoring.html may be of some help,
> plus the Javadocs and the code of course.
>
> What is it you are trying to do? Perhaps others have done similar
> things.
>
> -Grant
>
> On Dec 4, 2006, at 7:24 AM, Sajid Khan wrote:
>
>>
>> Hi all,
>> I need to add one more factor(like tf, idf .....) in the lucene
>> scoring formula. But i am not getting any idea of where should i
>> update the
>> code in Lucene.
>> Can anybody please help me to solve the problem?
>>
>> Ragards
>> Sajid Khan
>> --
>> View this message in context: http://www.nabble.com/Regarding-
>> adding-one-more-factor-in-lucene-scoring-formula-
>> tf2751348.html#a7675490
>> Sent from the Lucene - Java Developer mailing list archive at
>> Nabble.com.
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: java-dev-unsubscribe@lucene.apache.org
>> For additional commands, e-mail: java-dev-help@lucene.apache.org
>>
>
> --------------------------
> Grant Ingersoll
> Center for Natural Language Processing
> http://www.cnlp.org
>
> Read the Lucene Java FAQ at http://wiki.apache.org/jakarta-lucene/
> LuceneFAQ
>
>
>
> ---------------------------------------------------------------------
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>
>
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Re: Regarding adding one more factor in lucene scoring formula
Posted by Grant Ingersoll <gs...@apache.org>.
http://lucene.apache.org/java/docs/scoring.html may be of some help,
plus the Javadocs and the code of course.
What is it you are trying to do? Perhaps others have done similar
things.
-Grant
On Dec 4, 2006, at 7:24 AM, Sajid Khan wrote:
>
> Hi all,
> I need to add one more factor(like tf, idf .....) in the lucene
> scoring formula. But i am not getting any idea of where should i
> update the
> code in Lucene.
> Can anybody please help me to solve the problem?
>
> Ragards
> Sajid Khan
> --
> View this message in context: http://www.nabble.com/Regarding-
> adding-one-more-factor-in-lucene-scoring-formula-
> tf2751348.html#a7675490
> Sent from the Lucene - Java Developer mailing list archive at
> Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-dev-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-dev-help@lucene.apache.org
>
--------------------------
Grant Ingersoll
Center for Natural Language Processing
http://www.cnlp.org
Read the Lucene Java FAQ at http://wiki.apache.org/jakarta-lucene/
LuceneFAQ
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