On Sat, Nov 28, 2009 at 10:58 AM, Ted Dunning <ted.dunn...@gmail.com> wrote:
> Jake, > > Do you have any concrete information about how much difference there > actually is in these decompositions? > I do not. I'm not sure if this is supposed to be surprising or not, but I've for the most part done pretty well not even worrying about the missing data part, and I'm not sure why that is, because I buy most of the theoretical arguments for why you need to take care in treating the missing data separately. Maybe it's because I've always done some pretty hand-tuned early stopping, and where you get killed with the zeroes is in the case of overfitting? -jake > > On Sat, Nov 28, 2009 at 8:31 AM, Jake Mannix <jake.man...@gmail.com> > wrote: > > > or more precisely, a sparse SVD which doesn't treat > > missing data as the numerical 0 or mean of the values > > > > > > -- > Ted Dunning, CTO > DeepDyve >
