On Mon, Sep 10, 2012 at 1:11 PM, Pat Ferrel <[email protected]> wrote:
> Got it. > > Maybe it would be enough to do the projection into PCA space and back > project only a very very few individual vectors (cluster centroids and > special docs). Yes. On-demand fold-out works well. > As to density we can also do with only the top few terms so we could > drastically compress the dense vector. Still that would require calculating > the inverse of V I think. > The inverse of V is trivial. It is orthonormal so the inverse is the transpose.
