Please disregard my previous quick reply as I did not fully read your
message before replying. *ugh*
Erik
On Aug 2, 2006, at 2:32 PM, Zhao, Xin wrote:
Hi,
I noticed the scoring formula in the errata of book "Lucene in
Action" is a little different from the one in Javadoc. I enclosed
the one in Javadoc at the end of email. getBoost(t in q) is in
Javadoc's formula (which I assume is the correct one), but not in
"lucene in action". Any idea? We need to re-implement the scoring
in our application. What I understand is for each term in query, we
should multiply the indexing boost( the boost manfully added while
indexing) with the query boost, and with term frequency,
lengthnorm, idf. So the formula in Javadoc makes more sense to me.
Please correct me if I am wrong. Totally new to Lucene.
Appreciate your help,
Xin
*************************************************************
score(q,d) =
Σ ( tf(t in d) * idf(t)^2 * getBoost(t in q) * getBoost
(t.field in d) * lengthNorm(t.field in d) ) * coord(q,d) *
queryNorm(sumOfSqaredWeights)
t in q
************************************************************
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
