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From Grant Ingersoll <gsing...@apache.org>
Subject Clarifying output from Taste demo
Date Wed, 18 Mar 2009 17:42:11 GMT
Just to clarify, when I run the group lens demo, say with:
http://localhost:8080/mahout-taste-webapp/RecommenderServlet?userID=12&debug=true

I get something like:
User:User[id:12]
Recommender:  
GroupLensRecommender 
[recommender:CachingRecommender 
[recommender:SlopeOneRecommender[weighted:true, stdDevWeighted:true,  
diffStorage:MemoryDiffStorage]]]

Top 20 Preferences:
5.0	111	Taxi Driver (1976)	Drama|Thriller
5.0	1198	Raiders of the Lost Ark (1981)	Action|Adventure
5.0	1221	Godfather: Part II The (1974)	Action|Crime|Drama
5.0	2804	Christmas Story A (1983)	Comedy|Drama
...

Recommendations:
7.0	557	Mamma Roma (1962)	Drama
5.5	2510	Just the Ticket (1999)	Comedy|Romance
5.5	3295	Raining Stones (1993)	Drama
...

Thus, what I am seeing here, is the preferences are the movies that  
user 12 rated and which were then used to derive the recommendations  
listed at the bottom, right?

Also, it says I'm using a SlopeOneRecommender, what does that do  
compared to the other recommenders, as discussed in http://localhost:8888/taste.html#examples

?  That is, is it appropriate to substitute in the other ones for this  
demo?  Would it be worth updating the demo to show the results of the  
various recommenders?

Thanks
Grant

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