Mahout does not guarantee specified recs for each user. There are many reasons, e.g, there might not be enough similar users or items for a user.
Peng Zhang -- Sent from my iPhone > On Sep 15, 2014, at 3:15 PM, Wei Li <wei.le...@gmail.com> wrote: > > Hi Mahout Users: > > We are using the RecommderJob to perform the item-based > recommendations, the following settings are used: > > similairtyClassname=SIMILARITY_COOCCURRENCE > numRecommendations=20 > other parameters are set to default values > > while we see that the size of the recommendation results for some users is > less than 20, only 1 or 2. Since we have no time to dive into the source > code now, we do know if we see the right parameters. Does any one can help > us on this issue? many thanks :) > > Best > Wei
