gresh at us
Nov 20, 2007, 7:35 AM
Post #1 of 1
(338 views)
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MoreLikeThis and setBoost
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I've been stepping through the contrib MoreLikeThis class and was
wondering if people can give opinions on why you would or would not use
setBoost(true) for the MoreLikeThis object. It seems a bit odd (at least
to me) to boost the "good" terms in the query (based on the term's score),
since won't the final score (once you use the query) in some sense
"reflect" the effect of good terms already through the tf-idf? Is using
boost in some way trying to "make up" for the fact that the returned query
for the MLT object "loses" the term frequency of the terms in the
reference document (that is, no matter how many times a term is in the
reference document, the query remains the same, assuming that the term
makes it into the query via the MLT heuristics).
Thanks for any words of wisdom--
Donna
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