mahout-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ted Dunning <>
Subject Re: A question regarding GenericUserBasedRecommender
Date Thu, 12 Aug 2010 20:09:30 GMT
Focussing on rating error is also problematic in that it causes us to worry
about being correct about the estimated ratings for items that will *never*
be shown to a user.

In my mind, the only thing that matters in a practical system is the
ordering of the top few items and the rough composition of the top few
hundred items.  Everything else makes no difference at all for real-world

On Thu, Aug 12, 2010 at 12:53 PM, Sean Owen <> wrote:

> I agree with your reading of what the Herlocker paper is saying. The
> paper is focused on producing one estimated rating, not
> recommendations. While those tasks are related -- recommendations are
> those with the highest estimated ratings -- translating what's in
> Herlocker directly to a recommendation algorithm is a significant
> jump.

  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message