Projecting to the first "two" singular vectors? Do an SVD on a random matrix, and use the first 2 (or three) singular vectors as a matrix?
What goes into the affinity matrix? On Wed, Jun 8, 2011 at 4:24 PM, Ted Dunning <[email protected]> wrote: > Projecting to the first to singular vectors is better. > > Forming an affinity (rather than distance) matrix and projecting to > those coordinations is very interesting. > > On Thu, Jun 9, 2011 at 12:25 AM, Lance Norskog <[email protected]> wrote: >> I've used multi-dimensional scaling (MDS) in another toolkit to >> down-project high-dim vectors to 2d and 3d. What tools for this are >> available in Mahout? Random Projection down to 2 dimensions is easy, >> but seems unsound. >> >> -- >> Lance Norskog >> [email protected] >> > -- Lance Norskog [email protected]
