Ah you did not say boolean / non boolean recommenders, you talking about boolean preference ratings.
Ok I think I have it. I'm up to chapter 5 in the mahout in action book (so please bare with me:-) So is it fair to say table 5.1 and 5.2 should avoid the comparissons between the top two ? On 25 October 2011 20:55, lee carroll <[email protected]> wrote: > I've not come across the terms boolean / non boolean recommenders > before. I thought they all worked by > estimating preferences. > > > > On 25 October 2011 19:13, Sean Owen <[email protected]> wrote: >> You should be able to compare across all of the "non-boolean" >> recommenders as they all operate by estimating preferences. >> >> But it's not meaningful for any comparison, for the rest. >> >> On Tue, Oct 25, 2011 at 7:04 PM, lee carroll >> <[email protected]> wrote: >>> So when comparing within a technique AAD or RMS is fine but when comparing >>> across recommenders using a variety of similarities its best to stick >>> to IR measures. >> >
