Precision is not a great metric for recommenders, but it exists. There is no best value here; I would choose something that mirrors how you will use the results. If you show top 3 recs, use 3.
On Tue, Jan 15, 2013 at 4:51 PM, Zia mel <ziad.kame...@gmail.com> wrote: > Hello, > > If I have users that have items between 1-20 , what would be the ideal > way to evaluate the recommender using precisoion? Is there any > recommended precision to choose such as p@2 , p@5 p@10 or others and > why? > > Many thanks
