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From: Grant Ingersoll <gsingers@apache.org>
Subject: Re: simple (?) question about scoring
Date: Thu, 2 Nov 2006 12:14:23 -0500
To: java-user@lucene.apache.org

Also, from the javadocs, check out the explain method on Searcher:  =20
http://lucene.apache.org/java/docs/api/org/apache/lucene/search/=20
Searcher.html#explain(org.apache.lucene.search.Query,%20int)

As for the state of the documentation, If you have concerns about the =20=

javadocs, please write up an issue in JIRA and, even better, submit a =20=

patch with your improvements.  We are always looking for help, =20
especially in the documentation department.  Lucene will only get =20
better by having people make quality contributions based on their =20
knowledge of Lucene and IR.

-Grant

On Nov 2, 2006, at 11:09 AM, Erick Erickson wrote:

> Well, the simplest way is to look at the HITS object returned from =20
> a search.
> Something like
>
> Hits hits =3D searcher.search(new TermQuery(new Term("field", =20
> "value")));
> for (int idx =3D 0; idx < hits.length(); ++idx)
>    float score =3D hits.score(idx);
>
>
> Look at the warnings in the javadoc for why using the Hits object =20
> rather
> than a HitCollector is not optimal if you intend to look at more =20
> than 100 or
> so documents...
>
> Best
> Erick
>
> On 11/2/06, Michele Amoretti <amoretti@ce.unipr.it> wrote:
>>
>> Hello, I am completely new at Lucene. I browsed the web site and the
>> source code, searching for an example which illustrates the following
>> operation:
>>
>> given a Query and a Document, return the score
>>
>> To me, this is a very basic operation, but I cannot find a class =20
>> which
>> easily provide this functionality.
>>
>> E.g. the Similarity class provides methods which return the =20
>> factors of
>> the scoring formula, but I would like a method which returns the =20
>> score
>> directly.
>>
>> Is this possible?
>>
>> Is the Scorer class the solution? Javadoc is too poor to understand
>> how to use it. Btw, I do not have an index, I have 1 Document, and 1
>> Query.
>>
>> Thanks
>>
>> --
>> Michele Amoretti, Ph.D.
>> Distributed Systems Group
>> Dipartimento di Ingegneria dell'Informazione
>> Universit=E0 degli Studi di Parma
>> http://www.ce.unipr.it/people/amoretti
>>
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>>
>>


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