What is your DataModel like? what is your range of ratings? I don't think it's sparsity, no. These are results from just a handful of users; it's possible that the test results in 0 for just those users. But it's not a great sign; I do think something's wrong here but don't yet see an issue with what you are doing.
On Wed, Feb 24, 2010 at 7:07 PM, Mirko <[email protected]> wrote: > Hi all, > I would like to evaluate the IR statistics of my item based recommender with > the GenericRecommenderIRStatsEvaluator. However, precision and recall are 0.0 > for each user, as I can see from my logs. > > Possible, that my data are too sparse?
