how do I normalise a solr/lucene score?

Question

I am trying to work out how to improve the scoring of solr search results. My application needs to take the score from the solr results and display a number of “stars” depe

Answer 1

It's called normalized score (Scores As Percentages).

You can use the following the following parameters to achieve that:

ns = {!func}product(scale(product(query({!type=edismax v=$q}),1),0,1),100)
fq = {!frange l=20}$ns

Where 20 is your 20% threshold.

See also:

Remove results below a certain score threshold in Solr/Lucene?

http://article.gmane.org/gmane.comp.jakarta.lucene.user/12076 http://article.gmane.org/gmane.comp.jakarta.lucene.user/10810