thanks a lot!
On Tue, Jan 29, 2013 at 3:45 PM, Xavier Rampino <[email protected]>wrote: > Just to add that you can also > use UserNeighborhood.getUserNeighborhood(userId) to find the most similar > users to a given one, should you want to. > > On Tue, Jan 22, 2013 at 9:02 PM, Henning Kuich <[email protected]> wrote: > > > ok, thanks! > > > > > > On Tue, Jan 22, 2013 at 8:59 PM, Sean Owen <[email protected]> wrote: > > > > > That's a question of using item-item similarity. For that you need to > > > use something based on an ItemSimilarity, which is not user-based but > > > instead the item-based implementation. Or you can just use > > > ItemSimilarity directly to iterate over the possibilities and find > > > most similar, but, the recommender would do it for you. > > > > > > On Tue, Jan 22, 2013 at 7:50 PM, Henning Kuich <[email protected]> > wrote: > > > > Oh, I forgot one thing: Is it just as simple using the User-based > > > > recommendation to find similar products, or is this only possible > using > > > > item-based recommendations? So basically if a given user rated a > > certain > > > > product with x stars, to figure out what item is most like the one he > > has > > > > just rated, but using only user-based recommendation algorithms? > > > > > > > > HK > > > > > > > > > > > > On Tue, Jan 22, 2013 at 7:44 PM, Henning Kuich <[email protected]> > > wrote: > > > > > > > >> That's what i though. I just wanted to make sure! > > > >> > > > >> Thanks so much for the quick reply! > > > >> > > > >> HK > > > >> > > > >> > > > >> > > > >> On Tue, Jan 22, 2013 at 7:40 PM, Sean Owen <[email protected]> > wrote: > > > >> > > > >>> Yes that's right. Look as > UserBasedRecommender.mostSimilarUserIDs(), > > > >>> and Recommender.estimatePreference(). These do what you are > > interested > > > >>> in, and yes they are easy since they are just steps in the > > > >>> recommendation process anyway. > > > >>> > > > >>> On Tue, Jan 22, 2013 at 6:38 PM, Henning Kuich <[email protected]> > > > wrote: > > > >>> > Dear All, > > > >>> > > > > >>> > I am wondering if I understand the User-based recommendation > > > algorithm > > > >>> > correctly. > > > >>> > > > > >>> > I need to be able to answer the following questions, given users > > and > > > >>> > ratings: > > > >>> > > > > >>> > 1) Which users are "closest" to a given user > > > >>> > and > > > >>> > 2) given a user and a product, predict the preference for the > > product > > > >>> > > > > >>> > apart from the standard "return topN" recommendations. But as I > > > >>> understand > > > >>> > it, the above two questions are just "subquestions" of the topN > > > problem, > > > >>> > correct? Because the algorithm determines the "closest users" > since > > > >>> it's a > > > >>> > user-based recommender, and since it calculates all potential > > > user-item > > > >>> > associations, the second question should also be taken care of. > > > >>> > > > > >>> > Do I understand this correctly? > > > >>> > > > > >>> > I would greatly appreciate any help, > > > >>> > > > > >>> > Henning > > > >>> > > > > >>> > > > > >>> > > > > >>> > > > > >>> > Confidentiality Notice: This e-mail message, including any > > > >>> > attachments, is for the sole use of the intended recipient(s) and > > may > > > >>> > contain confidential and privileged information. Any > unauthorized > > > >>> > review, use, disclosure or distribution is prohibited. If you > are > > > not > > > >>> > the intended recipient, please contact the sender by reply e-mail > > and > > > >>> > destroy all copies of the original message. > > > >>> > > > >> > > > >> > > > >> > > > >> Confidentiality Notice: This e-mail message, including any > > > >> attachments, is for the sole use of the intended recipient(s) and > may > > > >> contain confidential and privileged information. Any unauthorized > > > >> review, use, disclosure or distribution is prohibited. If you are > not > > > >> the intended recipient, please contact the sender by reply e-mail > and > > > >> destroy all copies of the original message. > > > >> > > > > > > > > Confidentiality Notice: This e-mail message, including any > > > > attachments, is for the sole use of the intended recipient(s) and may > > > > contain confidential and privileged information. Any unauthorized > > > > review, use, disclosure or distribution is prohibited. If you are > not > > > > the intended recipient, please contact the sender by reply e-mail and > > > > destroy all copies of the original message. > > > > > > > > >
