If you understand the domain, you can inspect things by hand. That is only of limited utility.
You can also test click through if your data comes from a live system and you have set up to do testing. (always set up to do testing!) On Fri, Dec 14, 2012 at 2:40 AM, Sean Owen <[email protected]> wrote: > It's still true. There aren't much better tests you can run in this > situation, since you are not evaluating predicted ratings, but > attempting to assess how good the recommendations are when you don't > have any nearly complete information on what the good recommendations > are a priori. > > > On Fri, Dec 14, 2012 at 10:37 AM, ashish negi > <[email protected]> wrote: > > Thanks for quick reply and suggestions. > > So Is there any measure to test whether SVD is performing on data or not? > > > > I read following lines from you book mahout in action > > --- > > In the case of Boolean preference data, only a precision-recall test is > > available > > anyway. It’s worth understanding the test’s limitations in this context. > > --- > > > > Is it true now also (with new version of mahout)? > > Regards, > > Ashish >
