Ah, distributed implementation. no there is no such implementation now, but see: https://issues.apache.org/jira/browse/MAHOUT-1004
On Wed, May 9, 2012 at 4:19 PM, 冯伟 <[email protected]> wrote: > Sorry for my poor English. My question is like this: When I use > "org.apache.mahout.cf.taste.hadoop.item.RecommenderJob", my input file is > in the format: > "uid, itemid, rating" > "uid, itemid, rating" > "uid, itemid, rating" > According to the above input, > org.apache.mahout.cf.taste.hadoop.item.RecommenderJob will give item-based > recommendations. When I exchange the postions of uid and itemid, the input > file would be > "itemid, uid, rating" > "itemid, uid, rating" > "itemid, uid, rating" > According to the above input, > org.apache.mahout.cf.taste.hadoop.item.RecommenderJob would generate > user-based recommendation. Is that right? > > 2012/5/9 Sean Owen <[email protected]> > > > Both of these have been implemented since before Mahout. Can you clarify? > > Don't understand at the moment. > > On May 9, 2012 3:42 PM, "冯伟" <[email protected]> wrote: > > > > > I found that only item-based recommender is implemented in version-0.6. > > > When I want to use the user-based recommender, all I need to do is to > > > transpose the input, i.e., <uid, itemid, rating> ---> <itemid, uid, > > > rating>，right? Is there any other differences between item-based and > > > user-based approach, which is not noticed by me? > > > > > > -- > > > Wei Feng > > > > > > > > > -- > Wei Feng >
