These can use non boolean data as the value will just be ignored. The opposite is what does not work. On Jan 23, 2013 4:45 PM, "Zia mel" <ziad.kame...@gmail.com> wrote:
> OK . The TanimotoCoefficientSimilarity and LogLikelihoodSimilarity > used in MIA page 54 and 55 provide a score, so it seems they were not > using a Boolean recommender , something like code 1 maybe? Thanks > > On Tue, Jan 22, 2013 at 10:42 AM, Sean Owen <sro...@gmail.com> wrote: > > Yes any metric that concerns estimated value vs real value can't be > > used since all values are 1. Yes, when you use the non-boolean version > > with boolean data you always get 1. When you use the boolean version > > with boolean data you will get nonsense since the output of this > > recommender is not an estimated rating at all. > > > > On Tue, Jan 22, 2013 at 4:40 PM, Zia mel <ziad.kame...@gmail.com> wrote: > >> I got 0 when I used GenericUserBasedRecommender in code 2 but when > >> using GenericBooleanPrefUserBasedRecommender score was not 0 . I > >> repeat the test with different data and again I got some results. > >> Moreover , when I use > >> DataModel model = new FileDataModel(new File("ua.base")); > >> in code 2, the MAE score was higher. > >> > >> When you say RMSE can't be used with boolean data, I assume MAE also > >> can't be used? > >> > >> Thanks ! > >> > >> On Tue, Jan 22, 2013 at 10:08 AM, Sean Owen <sro...@gmail.com> wrote: > >>> RMSE can't > >>> be used with boolean data. >