It throws an exception except in a few implementations, mostly the ones based on a database. It isn't something that's really used -- you instead update the backing store indirectly. Yes, the model is batch re-reads of data once in a while. Updates are not in real time in this model.
On Wed, Jan 30, 2013 at 8:21 AM, Henning Kuich <hku...@gmail.com> wrote: > So what does the method do instead? > > And basically the conclusion is: To "update" your recommender with new > preference values, you need to reload the data model and everything that > follows? > > Thanks, > > Henning > > > On Tue, Jan 29, 2013 at 7:30 PM, Sean Owen <sro...@gmail.com> wrote: > >> It doesn't really work this way. The model is predicated on loading the >> data from backing store periodically. In the short term it is read only. >> This method is misleading in a sense. >> On Jan 29, 2013 3:31 PM, "Henning Kuich" <hku...@gmail.com> wrote: >> >> > Dear All, >> > >> > I would like to be able to update recommendations in the DataModel, and I >> > understand that this can be done with the setPreference() method. So this >> > can be used to create a new user-item-preference entry into the data >> model, >> > or update an already existing one. >> > >> > My question is the following: >> > >> > I run my recommender.recommend, and get a recommendation for user1. >> > As it happens, user1 now rates 5 other items, and I use the >> setPreference() >> > method to place those 5 new ratings into my DataModel. >> > If I now re-run the recommender.recommend, does the recommender >> > automatically incorporate the 5 new ratings that have just been made, or >> do >> > I need to update the recommender in between? And if so, how do I do this? >> > >> > I hope this question makes sense, and many thanks in advance. >> > >> > Henning >> > -- >> > >> > P. Henning J. L. Kuich >> > email: hku...@gmail.com >> > twitter: @hkuich <http://twitter.com/hkuich> >> > facebook: henning.kuich >> > G+: hkuich >> > >> > 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. >> > >> > > > > -- > > P. Henning J. L. Kuich > email: hku...@gmail.com > twitter: @hkuich <http://twitter.com/hkuich> > facebook: henning.kuich > G+: hkuich > > 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.
