what about constructing a neighborhood of similar items and consider users who rated the target item?
something like this paper: http://portal.acm.org/citation.cfm?id=371920.372071 srowen wrote: > > It's an interesting question, and I think the quickest answer is -- > what item would be the center of the neighborhood? how would you > incorporate a notion of neighborhood? > > For users, it's clear: you construct ahead of time a neighborhood of > similar users and consider item's they've rated. For item-based > recommenders, this idea doesn't exist. > > It's easy to imagine new algorithms involving a neighborhood of items. > Maybe I look at each item a user knows about, construct a neighborhood > around that item and do something with it. These aren't canonical > algorithms, but you could try them. > > Sean > > On Fri, Feb 19, 2010 at 10:51 PM, jamborta <[email protected]> wrote: >> >> hi, >> >> just wondering why there is no option to set the neighbourhood size for >> item-based recommendation. I had a look at the implementation and it >> looks >> like you take into account all items. is there a reason for that? >> >> thanks >> Tamas >> >> -- >> View this message in context: >> http://old.nabble.com/item-based-recommendation-neighbourhood-size-tp27661482p27661482.html >> Sent from the Mahout User List mailing list archive at Nabble.com. >> >> > > -- View this message in context: http://old.nabble.com/item-based-recommendation-neighbourhood-size-tp27661482p27661852.html Sent from the Mahout User List mailing list archive at Nabble.com.
