Hi Sean, Let me share how i have done it. Is it possible to increase and give recommendation based on user preference selection? ----------------------------------------------------------------------------------- IDRescorer rescorer = new UserSpecificIDsRescorer(map);
ItemSimilarity similarity = new LogLikelihoodSimilarity(model); recommender = new GenericItemBasedRecommender(model, similarity, new UserSpecificItemsStrategy(map), //custom new CategorizedItemsStrategy()); //custom result = recommender.recommend(user, howMany, rescorer); Map<Long, RecommendedItem> recommendMap = Maps.newHashMap(); updateMap() in my map local. recommender = new SlopeOneRecommender(model); result = recommender.recommend(user, howMany, rescorer); updateMap() in my map local. ----------------------------------------------------------------------------------- Regards, cleophus ________________________________ From: Sean Owen [mailto:sro...@gmail.com] Sent: Fri 7/13/2012 4:29 PM To: user@mahout.apache.org Subject: Re: Need help on Mahout Recommendation - using Preferences SlopeOneRecommender does not use an ItemSimilarity, what are you referring to ? User and item ID must be an integer (long). You use the IDRescorer to do exactly the query-time filtering you describe. The recommender will give you as many recs as you ask for, unless it is not possible to calculate more than that. There are simply not even 50 eligible items to recommend in your data set sometimes. On Fri, Jul 13, 2012 at 12:31 PM, Cleophus Pereira <cleophus.pere...@mphasis.com> wrote: > Hi All, > > This is my first interaction with this group. I am working on Apache Mahout > Recommendation. I am using IDRescorer, LogLikelihoodSimilarity, > SlopeOneRecommender algorithm for getting recommendation. As per my > understanding recommendation works based on user input like. > > userid (String),itemid(String) and preference (double). I have following > queries :- > > 1. Let say user has below preferences on screen > > Category : > > Shopping - Sub Preference - Books, Video, Electronics, Apparels. > > User Select : Books and Video > > Education - Sub Preference - Comedy and Science, History > > User Select : Comedy and Science > > Is it possible to show only get Recommendation of for above Categories > and Sub Preferences only. It should not show me other categories > > Presently recommendation show different type of items and not restricted > to those selected categories. > > 2. Right now the data of recommendation is capped to 50 items. But results > come less tha 50 items. How can we increase the items of recommendation? > > Any suggesstion/idea would really help? > > Thanks, > > Cleophus P. > > > > > > > Information transmitted by this e-mail is proprietary to MphasiS, its > associated companies and/ or its customers and is intended > for use only by the individual or entity to which it is addressed, and may > contain information that is privileged, confidential or > exempt from disclosure under applicable law. If you are not the intended > recipient or it appears that this mail has been forwarded > to you without proper authority, you are notified that any use or > dissemination of this information in any manner is strictly > prohibited. In such cases, please notify us immediately at > mailmas...@mphasis.com and delete this mail from your records. Information transmitted by this e-mail is proprietary to MphasiS, its associated companies and/ or its customers and is intended for use only by the individual or entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If you are not the intended recipient or it appears that this mail has been forwarded to you without proper authority, you are notified that any use or dissemination of this information in any manner is strictly prohibited. In such cases, please notify us immediately at mailmas...@mphasis.com and delete this mail from your records.
