generating a sparse matrix with a specific singular value distribution
- From: charger144@xxxxxxxxxxxxxx
- Date: Sun, 26 Apr 2009 11:21:49 -0700 (PDT)
Hello,
I want to test an iterative algorithm on sparse matrices with
different singular value distributions. I can generate a full matrix
with a given singular value distribution by using a reverse SVD
decomposition. That is I know:
A = U*D*V' for any A, where U and V are orthogonal. I can get U and V
from a QR decomposition and supply a D with the singular values that I
want to generate A.
However, is it possible to generate a sparse matrix A in this way
(apart from generating A as above and removing elements at random)?
I would appreciate any ideas on this, thanks for your help.
.
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