Hi Anita, I had a similar question to the list not too long ago. I got very good answers from both Sean and Ted. Please check the archives and if you still have questions feel free to email me. I am sure I will learn something new.
Good luck! -Ahmed On Thu, Apr 5, 2012 at 4:20 PM, ameh <[email protected]> wrote: > Hi, > > I'm a new user to Mahout and am currently using the 1m ratings MovieLens > data file. I had a couple of questions: > > #1. /ItemBased using CF and content-based/ > I've been thinking of a way to incorporate content-based recommendations > (using additional attributes of an item, in this case a movie) by utilizing > a utility matrix where the rows correspond to users and columns correspond > to movies. The individual entries (say entry(i,j)) are the preferences > (ratings) expressed by user i for movie j. I know you can include > additional > columns, say genre, and identify a value for that entry based on the movies > rated by a particular within that genre type. > > This matrix would be pretty sparse. But I'm not sure *how* to combine this > with the out-of-box recommendations provided in Mahout. How will I do this > if my data model (a matrix) is different from DataModel? > > #2. /Adding in demographic information/ > I'd like to recommend movies to users, and not users to users, so I'm not > sure how I can incorporate user "attributes" (e.g. their age group, > occupation, etc) without doing this. The Libimseti dating recommendation > makes sense - there, we're recommending users to users. In my case, does it > make sense to just filter based on a particular e.g. age group, and make a > recommendation based on this filtered group? (I guess this rests on the > assumption that my filter will return users that are more similar to each > other because they are in the same demographic category (in this case age > group).) Or is there a better method of doing this? > > Any insight or advice based on past experience with this would be very > helpful. Thanks in advance. > > -- > View this message in context: > http://lucene.472066.n3.nabble.com/Combining-CF-and-Content-based-recommendations-tp3888524p3888524.html > Sent from the Mahout User List mailing list archive at Nabble.com. >
