Restarting this thread. I did try out the soln mentioned by Simon below, however that did not work. As changing the tf implementation to return 1, adversely affected by span scoring . ie, the slop distance does not affect score if i make tf as 1.
I had found a work around in some other way, but that has a hole. I really have no way other than to find a solution for this. :( To summarize, how to make sure tf does not affect the scoring but the span should still affect the scoring? Simon Willnauer wrote: > > Hey, > If I get you right you wanna make tf not affecting the score at all. > if so why don't you just return 1.0f by overriding similarity? > If you just wanna do that for the query you are using you could > override Query#getSimilarity and return a delegate to the actual > similarity. > > Hope that helps. > > simon > > On Wed, May 6, 2009 at 7:44 PM, Radha Sreedharan <radh...@gmail.com> > wrote: >> Hi all, >> >> All I have is a query running on a document with a single field which >> has some search value. This is all which will be present. >> No more documents / fields. >> >> I have the following specific requirements >> >> 1) Length of document should not affect score - Implemented as per >> lucene documentation using concept of Fair Similairty by making >> lengthnorm as 1 >> >> 2) The no of times a term in the query occurs in the search field >> should not affect the score >> >> 3) I am using the spannearquery. Hence the slop should affect the score. >> >> >> I implemented 2) by changing the tf to return 1 if freq >0 . >> >> But this adversely affects 3) as the slop value is factored into the >> tf ( as per what I can see in the span scorer) >> >> >> How can I ensure the frequency of a certain term does not affect the >> score while at the same ensuring that the slop does affect it ? >> >> >> Thanks, >> Radha >> > > > -- View this message in context: http://www.nabble.com/Modifying-score-based-on-tf-and-slop-tp23412168p24269846.html Sent from the Lucene - Java Users mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
