Re: evaluating recommender

10, 2015, at 5:49 AM, PierLorenzo Bianchini piell...@yahoo.com.INVALID wrote: Hi all, I have a question on the results of an evaluation (I'm using RMSRecommenderEvaluator). I'm getting a result of 0.7432629235004433 with one of the recommenders I'm testing. I read in several places

Re: fast performance way of writing preferences to file?

SIMILARITY_COSINE leads you and customize that maybe? There are in-memory and mapreduce versions and not sure which you are using. That is code I haven’t looked at for a long time so can’t get you much closer. On Apr 3, 2015, at 10:52 AM, PierLorenzo Bianchini piell...@yahoo.com.INVALID

fast performance way of writing preferences to file?

Hello everyone, I'm new to mahout, to recommender systems and to the mailing list. I''m trying to find a (fast) way to write back preferences to a file. I tried a few methods but I'm sure there must be a better approach. Here's the deal (you can find the same post in stackoverflow[1]). I have a

adjusted cosine similarity for item-based recommender?

hello everyone, I'm trying to build item-based recommender that would take the users' rating-bias into account. According to my class' slides, that should involve adjusted cosine similarity. I couldn't find such implementation in Mahout... did I search it in the wrong place or should I

Re: adjusted cosine similarity for item-based recommender?

recommendations. The code in question was deprecated precisely because it has little practical impact. On Fri, Apr 3, 2015 at 3:36 AM, PierLorenzo Bianchini piell...@yahoo.com.invalid wrote: hello everyone, I'm trying to build item-based recommender that would take the users

Re: fast performance way of writing preferences to file?

AM, PierLorenzo Bianchini piell...@yahoo.com.invalid wrote: Hello everyone, I'm new to mahout, to recommender systems and to the mailing list. I''m trying to find a (fast) way to write back preferences to a file. I tried a few methods but I'm sure there must be a better approach