There's another use case for scaling the score. Suppose I want to compute a custom score based on the weighted sum of:
- product(0.75, relevance score) - product(0.25, value from another field) For this to work, both fields must have values between 0-1, for example. Toby's example using the scale function seems to work, but you have to use fq to eliminate results with score=0. It seems this is somewhat expensive, since the scaling can't be done until all results have been collected to get the max score. Then, are the results resorted? I haven't looked closely, yet. Peter Peter On Thu, Oct 31, 2013 at 7:48 PM, Toby Lazar <tla...@capitaltg.com> wrote: > I think you are looking for something like this, though you can omit the fq > section: > > > > http://localhost:8983/solr/collection/select?abc=text:bob&q={!func}scale(product(query($abc),1),0,1)&fq={ > ! > frange l=0.9}$q > > Also, I don't understand all the fuss about normalized scores. In the > linked example, I can see an interest in searching for "apple bannana", > "zzz yyy xxx qqq kkk ttt rrr 111", etc. and wanting only close matches for > that point in time. Would this be a good use for this approach? I > understand that the results can change if the documents in the index > change. > > Thanks, > > Toby > > > > On Thu, Oct 31, 2013 at 12:56 AM, Anshum Gupta <ans...@anshumgupta.net > >wrote: > > > Hi Susheel, > > > > Have a look at this: > > http://wiki.apache.org/lucene-java/ScoresAsPercentages > > > > You may really want to reconsider doing that. > > > > > > > > > > On Thu, Oct 31, 2013 at 9:41 AM, sushil sharma <sushil2...@yahoo.co.in > > >wrote: > > > > > Hi, > > > > > > We have a requirement where user would like to see a score (between 0 > to > > > 1) which can tell how close the input search string is with result > > string. > > > So if input was very close but not exact matach, score could be .90 > etc. > > > > > > I do understand that we can get score from solr & divide by highest > score > > > but that will always show 1 even if we match was not exact. > > > > > > Regards, > > > Susheel > > > > > > > > > > -- > > > > Anshum Gupta > > http://www.anshumgupta.net > > >
