mahout-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Nkechi Nnadi <nkechi.nn...@gmail.com>
Subject Re: KnnItemBasedRecommender question
Date Thu, 24 Nov 2011 01:51:59 GMT
I believe the paper used was:
R. M. Bell and Y. Koren, "Scalable Collaborative Filtering with Jointly
Derived Neighborhood Interpolation Weights", *Proc. IEEE International
Conference on Data Mining (ICDM'07)*, 2007.
http://public.research.att.com/~volinsky/netflix/BellKorICDM07.pdf


On Wed, Nov 23, 2011 at 10:16 AM, Sean Owen <srowen@gmail.com> wrote:

> I know Andre Pannison wrote that bit of code -- Andre are you still on the
> list?
>
> Can you supply the paper, maybe I can have an independent look at the
> algorithm vs implementation.
>
> On Wed, Nov 23, 2011 at 2:34 PM, Georgi Stanev <
> Georgi.Stanev@holidaycheck.com> wrote:
>
> >
> > ________________________________
> > Hi there,
> >
> > I have a question about the KnnItemBasedRecommender, precisely about the
> > calculation of the interpolations.
> > The paper of Robert M. Bell and Yehuda Koren says, that by the
> calculation
> > of the matrix A there is made an assumption, that all users but u (the
> > current user) have rated all items in the neighborhood. So Ajk =
> sigma(Rvj
> > * Rvk). The user u is not included in this set.
> > In the method getInterpolations, Rvj is always multiplied by Ruk. Isn't
> > that wrong?
> > I mean you have to pass all users that rated all items in the
> neighborhood
> > and than multiply Rvj with there ratings.
> > Sorry about my english and I hope you can understan what I mean.
> >
> > Thanks for any replies and thoughts.
> > Greetings Georgi
> >
>

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