On Mon, Feb 2, 2009 at 18:21, mtrumpis@berkeley.edu wrote:
Hello list.. I've run into two SVD errors over the last few days. Both errors are identical in numpy/scipy.
I've submitted a ticket for the 1st problem (numpy ticket #990). Summary is: some builds of the lapack_lite module linking against system LAPACK (not the bundled dlapack_lite.o, etc) give a "LinAlgError: SVD did not converge" exception on my matrix. This error does occur using Mac's Accelerate framework LAPACK, and a coworker's Ubuntu LAPACK version. It does not seem to happen using ATLAS LAPACK (nor using Octave/Matlab on said Ubuntu)
These are almost certainly issues with the particular implementations of LAPACK that you are using. I don't think there is anything we can do from numpy or scipy to change this.