Hi Tamas, are you looking at the current trunk of Mahout 0.4? We made the method use a customizable "CandidateItemsStrategy" implementation lately. I guess you're talking about PreferredItemsNeighborhoodCandidateItemsStrategy then which is the default implementation.
What talk about is actually not a bug, if there are no co-rated items it's absolutely logical that nothing can be recommended. In a real world application you would maybe want to show the user the latest or overall top-rated items as a workaround (just to show them something). --sebastian Am 15.08.2010 19:22, schrieb Tamas Jambor: > hi, > > I have just spotted a possible bug in AbstractRecommender, the > getAllOtherItems only gets items if there is at least one co-rated > item between the target user and other users. For example if there are > only two users in the system and they didn't co-rate any items than > this method returns nothing. > > Tamas
