The version of Mahout which I used is 0.7-cdh4.3.1 and I am sure that no errors occur. I check the output but it has null. I think the problem is my data set. Is it too small about my item set that only 200 elements?
On Thu, Aug 1, 2013 at 9:57 PM, Sebastian Schelter <[email protected]> wrote: > Which version of Mahout are you using? Did you check the output, are you > sure that no errors occur? > > Best, > Sebastian > > On 01.08.2013 09:59, hahn jiang wrote: > > Hi all, > > > > > > I have a question when I use RecommenderJob for item-based > recommendation. > > > > My input data format is "userid,itemid,1", so I set booleanData option is > > true. > > > > The length of users is 9,000,000 but the length of item is 200. > > > > > > When I run the RecommenderJob, the result is null. I try many times use > > different arguments. But the result is also null. > > > > This is one of my commands. Would you help me for tell me why it is null > > please? > > > > > > bash recommender-job.sh --input input/user-item-value --output > > output/recommender --numRecommendations 10 --similarityClassname > > SIMILARITY_PEARSON_CORRELATION --maxSimilaritiesPerItem 300 > > --maxPrefsPerUser 300 --minPrefsPerUser 1 > --maxPrefsPerUserInItemSimilarity > > 10000000 --booleanData true > > > > > > Thanks > > > >
