[xamat]

Hi @kenjackson, this is Xavier here. How do you propose to validate this on the Netflix dataset? It is clear that you cannot use RMSE to compare to other existing approaches, right? The way to go would be to propose a different success measure (i.e. ranking based) and measure how different algorithm perform. And then validate this on users to prove that optimizing RMSE is not as useful.

If you give me a few months, I might get there. But this is the reason I wrote a blog post and not a paper ;-)

[kenjackson]

If you give me a few months, I might get there. But this is the reason I wrote a blog post and not a paper ;-)

Fair enough. I'll keep my eyes peeled for a paper in a few months. :-)

[frak_your_couch]

I just wanted to point out that the link on your blog to PureSVD points to the wikipedia page for Discounted Cumulative Gain.

[xamat]

OOps! Thanks... just fixed it.

[frak_your_couch]

Hey, sorry, one more time. The updated link is also wrong, it's relative to your blog rather than absolute i.e. http://technocalifornia.blogspot.com/2011/04/research.yahoo.... as opposed to http://research.yahoo.com/files/recsys2010_submission_150.pd...

[xamat]

Oh man... damn blogger. Fixed it now... finally! Thanks!!!