Guys, Heres someone who did this hack:
http://blog.mindbridge.com/?p=55 Cheers, AZ On 7/31/07, Askar Zaidi <[EMAIL PROTECTED]> wrote: > > I'll have to use StringBuffer and get the Explanation in it as a String. > Then parse StringBuffer to get the scores of each field, then add them and > then boost the scores. That seems to be a non-trivial task. Is there any > other way around it ? > > Considering Boosting, can I boost the score of a field ? I came across > Boosting of a term in the query so that would mean, > > "apache^4 jakarta" > > This means I am more keen to find apache than jakarta. I am keen to boost > the score of a field, how can that be done ? > > On 7/31/07, Askar Zaidi <[EMAIL PROTECTED]> wrote: > > > > Using the Explanation method can help me get the exact score of a field. > > I am concerned with how I can access it , this is what I am doing: > > > > > > for(int i=0;i<hitCount;i++){ > > doc = hits.doc(i); > > score = hits.score(i); > > int ID = hits.id(i); > > System.out.println( id + "\t" + score + "\t" + doc.get > > ("item")); > > Explanation exp = searcher.explain( query , ID ); > > System.out.println( exp.toString() ); > > } > > > > This shows me o/p as follows (trimmed output): > > 6.6197186E-4 = (MATCH) product of: > > 0.0033098592 = (MATCH) sum of: > > 0.0033098592 = (MATCH) weight(contents:innovation in 4), product of: > > 0.28244132 = queryWeight(contents:innovation), product of: > > 1.0 = idf(docFreq=5) > > 0.28244132 = queryNorm > > 0.01171875 = (MATCH) fieldWeight(contents:innovation in 4), > > product of: > > 1.0 = tf(termFreq(contents:innovation)=1) > > 1.0 = idf(docFreq=5) > > 0.01171875 = fieldNorm(field=contents, doc=4) > > 0.2 = coord(1/5) > > > > The 6.6197E-4 is the total score of the document. How can I access the > > fieldWeight ? Any example would be great. > > > > thanks, > > AZ > > > > > > On 7/31/07, Erick Erickson <[EMAIL PROTECTED]> wrote: > > > > > > Boost the other three fields at search time. Boosting during > > > index time expresses "this document's title is worth more than > > > other doucments' titles". Boosting during search time expresses > > > "I care about matches on this clause more than I do on other > > > clauses". > > > > > > Will it help? How should I know? It's *your* application and > > > *you* are the one who is dissatisfied with the current scoring <G>. > > > > > > All I can say is try it and find out. You might consider using Luke > > > to try various boosts without having to mess with too much code. > > > > > > Erick > > > > > > On 7/31/07, Askar Zaidi < [EMAIL PROTECTED]> wrote: > > > > > > > > Boosting during Indexing or boosting during search ? > > > > > > > > I have 4 fields: > > > > > > > > {tags},{title},{summary},{contents} > > > > > > > > Typically a phrase occurs too many times in contents as compared to > > > the > > > > other fields. If I get the score of contents field , I can pass it > > > through > > > > an adjuster function which will bring the score down. Something > > > like: > > > > > > > > public static double adjuster(double count){ > > > > > > > > double newCount; > > > > newCount = 1/Math.exp(count); > > > > System.out.println(newCount); > > > > return newCount; > > > > > > > > } > > > > > > > > Do you mean I could boost the values of the other 3 fields ? Will > > > that > > > > help > > > > ? Would there be a way to bring down the score of the contents field > > > ? > > > > > > > > thanks, > > > > AZ > > > > > > > > > > > > On 7/31/07, Erick Erickson < [EMAIL PROTECTED] > wrote: > > > > > > > > > > Wouldn't boosting handle this for you? > > > > > > > > > > On 7/31/07, Askar Zaidi < [EMAIL PROTECTED]> wrote: > > > > > > > > > > > > To be more specific: > > > > > > > > > > > > I want to retrieve the scores of individual fields inside a > > > document > > > > so > > > > > > that > > > > > > I can manipulate the score of one field. This is the requirement > > > of my > > > > > > application. After the manipulation I can add these scores and > > > then > > > > show > > > > > > the > > > > > > total. > > > > > > > > > > > > thanks, > > > > > > > > > > > > AZ > > > > > > > > > > > > On 7/31/07, Askar Zaidi <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > > > > Hey guys, > > > > > > > > > > > > > > I was wondering if there is a way to retrieve score of a field > > > in a > > > > > > > document ? > > > > > > > > > > > > > > If my document looks like this: > > > > > > > > > > > > > > {itemID},{field 1},{field 2} > > > > > > > > > > > > > > I'd like to get score of individual fields 1 and 2 rather than > > > the > > > > > score > > > > > > > of the entire document. > > > > > > > > > > > > > > Is it possible ? > > > > > > > > > > > > > > thanks, > > > > > > > AZ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >
