On Wed, Oct 17, 2012 at 6:48 AM, Zeynep P. <zp...@yahoo.com> wrote: > > My index is created by lucene 3.6.
> Second problem, for the same collection MAP = 0.17 with default similarity, > MAP= 0.07 with lucene 4.0 BM25 similarity (b=0.75, k1=1.2). Did you read CHANGES.txt before doing this? This is really important to do. Note: most of the models do rely upon index statistics that are new in Lucene 4.0, so for existing 3.x indexes its a good idea to upgrade your index to the new format with IndexUpgrader first. --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
