Hi Stevo, So the method predictFromFactorization, which was in PredictorJob, seems not to have been migrated over. RecommenderJob gives me top N recommendations (plus predicted preferences). predictFromFactorization is handy because I can pass in userid, itemid pairs and get a preference prediction, such as the requirement from the Netflix challenge. It seems this feature was only in 0.5.
Regards Stuart On 13 September 2013 05:53, Stevo Slavić <[email protected]> wrote: > Hello Stuart, > > Have a look at description of > https://issues.apache.org/jira/browse/MAHOUT-872 > In a comment there Sebastian also references wiki entry: > > https://cwiki.apache.org/confluence/display/MAHOUT/Collaborative+Filtering+with+AlS-WR > > PredictionJob/predictFromFactorization was replaced with > org.apache.mahout.cf.taste.hadoop.als.RecommenderJob = recommendfactorized > : Compute recommendations using the factorization of a rating matrix > > See the RecommenderJob class javadoc for parameters: > > https://builds.apache.org/job/Mahout-Quality/javadoc/org/apache/mahout/cf/taste/hadoop/als/RecommenderJob.html > > Kind regards, > Stevo Slavic. > > > On Thu, Sep 12, 2013 at 11:49 AM, Stuart Horsman > <[email protected]>wrote: > > > So I'm using predictFromFactorization in Mahout 0.5 but this code was > > removed from 0.6. Is there any special reason for this? > > > > Thanks > > > > Stuart > > > > > > On 12 September 2013 08:28, Stuart Horsman <[email protected]> > > wrote: > > > > > Hi All, > > > > > > I'm new to mahout so thanks up front for the help. I'm running ALS-WR > on > > > a sparse matrix of movies and items and getting some recommendations > out. > > > However I want to predict user preference. I noticed there was a > > predictFromFactorization > > > in previous versions but seems to have been removed. > > > > > > What's the best approach I should take using 0.8? > > > > > > Thanks > > > Stuart > > > > > >
