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 >
