Hi Numpyers, I recently sent the message below to the MMTK mailing list, but it's really a problem with LinearAlgebra.py. The routine LinearAlgebra.eigenvectors() never stops, even when I try to diagonalize a very simple 2x2 matrix. I've tried this on two machines with completely standard FC4 and FC5 installations using the default libraries and atlas libraries downloaded and installed via yum. Does anyone on this list have any experience with this problem? Cheers, Seth ---------- Forwarded message ---------- From: Dr. Seth Olsen <seth.olsen@gmail.com> Date: Sep 19, 2006 10:38 AM Subject: Re: Collection.findTransformation() never stops To: mmtk@python.net, mmtk@starship.python.net Hi MMTKers, The problem with Collection.findTransformation() that I reported earlier is due to a problem with LinearAlgebra.eigenvectors(). This algortithm does not seem to stop - it can't even manage to find the eigenvectors of the 2x2 square matrix [[2,1],[1,2]]. Asking for this causes a long wait followed by CPU overheat warnings. Moreover, I have recompiled Numeric23.8 with newly installed atlas libraries, but it still won't work. I have had this problem now on 2 machines (one running FC4 with , the other FC5, both pentium 4 machines), with atlas lapack/blas libraries installed freshly via yum and linked as per the recommendations found in setup.py. THE FEDORA INSTALLATIONS ON BOTH MACHINES IS STANDARD - everything has been downloaded and installed via the fedora yum repositories. As the eigenvectors() routine in LinearAlgebra.py is obviously going to be a heavily used algorithm (not just in MMTK), is it really possible that no one has had this problem before? Cheers, Seth On 9/18/06, Dr. Seth Olsen <seth.olsen@gmail.com> wrote:
Hi MMTKers,
I'm having a bit of trouble with MMTK.Collection.findTransformation. When I use this member function, the computer never stops thinking until I kill the process. I've waited a couple of hours and still nothing. I get the same thing if I try to take a step back and use Collection.findTransformationAsQuaternion. Has anyone had this problem before?
Cheers,
Seth
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Dr Seth Olsen, PhD Postdoctoral Fellow, Biomolecular Modeling Group Centre for Computational Molecular Science Australian Institute for Bioengineering and Nanotechnology (Bldg. 75) The University of Queensland Qld 4072, Brisbane, Australia
tel (617) 3346 3976 fax (617) 33654623 email: s.olsen1@uq.edu.au Web: www.ccms.uq.edu.au
ccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccms The opinions expressed here are my own and do not reflect the positions of the University of Queensland.
-- ccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccms Dr Seth Olsen, PhD Postdoctoral Fellow, Biomolecular Modeling Group Centre for Computational Molecular Science Australian Institute for Bioengineering and Nanotechnology (Bldg. 75) The University of Queensland Qld 4072, Brisbane, Australia tel (617) 3346 3976 fax (617) 33654623 email: s.olsen1@uq.edu.au Web: www.ccms.uq.edu.au ccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccms The opinions expressed here are my own and do not reflect the positions of the University of Queensland. -- ccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccms Dr Seth Olsen, PhD Postdoctoral Fellow, Biomolecular Modeling Group Centre for Computational Molecular Science Australian Institute for Bioengineering and Nanotechnology (Bldg. 75) The University of Queensland Qld 4072, Brisbane, Australia tel (617) 3346 3976 fax (617) 33654623 email: s.olsen1@uq.edu.au Web: www.ccms.uq.edu.au ccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccmsccms The opinions expressed here are my own and do not reflect the positions of the University of Queensland.