On Thu, Feb 18, 2010 at 12:55:21AM +0100, Steven De Herdt wrote: > On Wed, Feb 17, 2010 at 8:50 PM, Thomas Weber > <[email protected]>wrote: > > > Could you use the example from the above bug report and see if > > uninstalling the optimized libraries helps? > > > No problem: > > **with libatlas3gf-sse2: > > octave:1> a = [1 2 3; 4 5 6; 7 8 9]*J; > octave:2> [u,s,v]=svd(a) > u = > > -0.032510 - 0.122510i 0.334536 - 0.011954i 0.112290 + 0.000145i > 0.045563 - 0.535097i -0.458023 + 0.414578i 0.736504 + 0.051393i > 0.070008 - 0.854667i -0.724855 - 0.113233i -0.608726 + 0.014930i > > s = > > Diagonal Matrix > > 17.224974 0 0 > 0 0.922528 0 > 0 0 0.043549 > > v = > > -0.46941 - 0.00000i -0.85522 - 0.00000i 0.21966 + 0.00000i > -0.56108 - 0.11783i 0.19894 + 0.22349i -0.42448 + 0.61832i > -0.64827 - 0.17467i 0.39474 - 0.06283i 0.15152 - 0.61790i > > octave:3> u*s*v' > ans = > > -0.00000 + 1.00000i 0.61970 + 1.04384i 0.85486 + 1.28824i > 0.00000 + 4.00000i 0.63485 + 5.41375i 0.91378 + 6.25676i > 0.00000 + 7.00000i 0.91329 + 8.54694i 1.52782 + 9.65463i > > > **without libatlas3gf-sse2: > > octave:1> a = [1 2 3; 4 5 6; 7 8 9]*J; > octave:2> [u,s,v]=svd(a) > u = > > -0.000000 - 0.214837i -0.000000 - 0.887231i -0.406669 - 0.035873i > 0.000000 - 0.520587i 0.000000 - 0.249644i 0.813338 + 0.071746i > 0.000000 - 0.826338i 0.000000 + 0.387943i -0.406669 - 0.035873i > > s = > > Diagonal Matrix > > 1.6848e+01 0 0 > 0 1.0684e+00 0 > 0 0 9.1627e-16 > > v = > > -0.47967 - 0.00000i 0.77669 + 0.00000i 0.40825 + 0.00000i > -0.57237 - 0.00000i 0.07569 - 0.00000i -0.81650 + 0.00000i > -0.66506 + 0.00000i -0.62532 + 0.00000i 0.40825 - 0.00000i > > octave:3> u*s*v' > ans = > > -0.0000 + 1.0000i 0.0000 + 2.0000i 0.0000 + 3.0000i > 0.0000 + 4.0000i -0.0000 + 5.0000i -0.0000 + 6.0000i > 0.0000 + 7.0000i -0.0000 + 8.0000i -0.0000 + 9.0000i > > (note that U(:,3) is not quite relevant for this rank-2 matrix)
Okay, so the fault is in the sse2 packages. > Package libatlas3gf-sse2 has > http://bugs.debian.org/<http://bugs.debian.org/569436>517826 > and the test mentioned fails with and succeeds without it. Should this bug > be moved there? No, there is already a bug there and I want to know when there are problems in Octave or libraries used by it. Thanks Thomas -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
