Mahout collab filtering would remove the items you have already rated since you would not want to see the same items which you have already used and rated.
On Mon, Aug 25, 2014 at 2:14 PM, Wei Li <[email protected]> wrote: > OK, why not just output the items uses clicked or rated before? does it > output the these records if we provide the userFile option? thanks. > > > On Mon, Aug 25, 2014 at 4:41 PM, Peng Zhang <[email protected]> wrote: > > > If there are no suitable recommendations for a user, the output will not > > contain any records related to this user. > > > > > > Peng Zhang > > > > > > On Aug 25, 2014, at 4:38 PM, Wei Li <[email protected]> wrote: > > > > > thanks Peng's answers. Yes, I know this case, but RecommenderJob does > not > > > output these records? > > > > > > > > > On Mon, Aug 25, 2014 at 3:37 PM, Peng Zhang <[email protected]> > > wrote: > > > > > >> If an item is not similar to anyone else, and a user only connects > with > > >> this item, this user doesnt get any recommended items. > > >> > > >> This is just one example. > > >> > > >> Peng Zhang > > >> > > >> -- > > >> Sent from my iPhone > > >> > > >>> On Aug 25, 2014, at 2:22 PM, Wei Li <[email protected]> wrote: > > >>> > > >>> Hi Mahout users: > > >>> > > >>> We have tried the item-based CF recommender with a user_id, > item_id, > > >>> rating data. while the recommendation output is less than our > expected, > > >> for > > >>> example, if we have 1000 users, the output should have 1000 records, > > one > > >>> for each user, right? > > >>> > > >>> Best > > >>> Wei > > >> > > > > >
