By "time-based" I meant something that supports recommendation by time of year (#2 on my list).
IDRescorer looks interesting, but (correct me if I'm wrong, I'm a complete newbie with Mahout and generally in this field) it seems more like a tool to refine the order of recommended items after the initial recommendation logic was applied. What I need is for the recommendation logic itself to be based on time and user-item similarity (I probably won't have relevant user-user information anyway). So, for example, I'm able to recommend christmas-related items only a week before christmas, and not just give them a boost using Rescorer. If that isn't possible I'm considering creating a virtual "perfect item" from the data I have (time of year and user data) and running an ItemBasedRecommender to find the items that most closely match this perfect item. Do you think that would be a feasible solution? On Sat, Mar 10, 2012 at 6:25 PM, Sean Owen <[email protected]> wrote: > If by #3 you mean you have preferences for many users, this is of > course the standard input for a recommender, yes. If you also have > some user-user similarity info beyond that, you can implement > UserSimliarity and use GenericUserBasedRecommender to incorporate > that. > > If you want to boost items according to some logic, like time (#2), > use IDRescorer. > > It sounds like you have a priori understanding of what items are best > for what users (#1). That's not something you can use directly, but I > suppose you could simply use this info as a multiplier (again with > IDRescorer), or perhaps the basis of a separate set of recommendations > you blend. > > What's a time-based recommender? > > > On Sat, Mar 10, 2012 at 2:51 PM, Alex Geller <[email protected]> wrote: > > Hi, > > > > I want to write a recommendation system which recommends items to > customers > > based on the following parameters (and some others): > > > > - User-item similarity (for example recommend items which target > certain > > gender,age etc. to users which meet these criteria) > > - Time of year (recommend items with a holiday theme before a major > > holiday) > > - Preferences of similar users > > > > I know Mahout supports User-User and Item-Item similarity, but how can I > > implement User-Item similarity? > > Also, is there any support for time-based recommendations? > > > > > > Thanks, > > > > Alex >
