lucene-java-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Karl Koch" <TheRan...@gmx.net>
Subject Re: Lucene scoring: coord_q_d factor
Date Wed, 13 Dec 2006 15:42:16 GMT
Do you know about any papers that discuss this?

Karl

-------- Original-Nachricht --------
Datum: Wed, 13 Dec 2006 10:31:41 -0500
Von: "Yonik Seeley" <yonik@apache.org>
An: java-user@lucene.apache.org
Betreff: Re: Lucene scoring: coord_q_d factor

> On 12/13/06, Karl Koch <TheRanger@gmx.net> wrote:
> > To me, it seems that coordination level matching could be used if I
> don't want to use TFxIDF but not together with it. In this context, I wonder
> what benefit the "coordination level matching" has in combination with
> TFxIDF?
> 
> Well, if I search for blue kangaroo, the coord is nice to get
> documents with "blue" and "kangaroo" to score higher than documents
> with just one term.  And among documents with just one term, the idf
> factor will make "kangaroo" rank above "blue", which is generally
> desired.
> 
> I have seen complaints about the default similarity though, where the
> coord factor does not give enough of a boost in relation to the idf of
> some of the individual terms.
> 
> 
> -Yonik
> http://incubator.apache.org/solr Solr, the open-source Lucene search
> server
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org

-- 
Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! 
Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer

---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-user-help@lucene.apache.org


Mime
View raw message