I get a result of 1.04. Are you sure your data file is right? Should be using ua.base from that data set.
On Nov 20, 2009 5:53 PM, "jamborta" <[email protected]> wrote: yes I get zero. I've just figured that if I do it this way, it works fine: public class ItemBasedBuilder implements RecommenderBuilder { @Override public Recommender buildRecommender(DataModel dataModel) throws TasteException { UserSimilarity userSimilarity = new PearsonCorrelationSimilarity(dataModel); UserNeighborhood neighborhood = new NearestNUserNeighborhood(10, userSimilarity, dataModel); Recommender recommender = new GenericUserBasedRecommender(dataModel, neighbo... but these two solution should give the same result I guess... srowen wrote: > > This looks fine to me (though you are building a user-based > recommender, and ... -- View this message in context: http://old.nabble.com/evaluating-recommender-systems-tp26421408p26443610.html Sent from the Mahout User List mailing list archive at Nabble.com.
