SVD and ALS aren't "user-based" or "item-based". They don't operate by computing similarities, which is the good news.
I think the ALS model is more appropriate. The SVD is more sophisticated (complex and hard to compute), arguably "overkill" for what recommenders need to do, and doesn't deal with sparse input as well. On Fri, Jun 22, 2012 at 6:57 AM, Way Cool <[email protected]> wrote: > I will try SVD and ALS. Are they good for both user-based and item-based > recommendations?
