Bug#525113: [Pkg-octave-devel] Bug#525113: Bug#525113: Inconsistant complex matrix multiplication
On Wed, Apr 22, 2009 at 11:04:14PM +0200, Thomas Weber wrote: On Wed, Apr 22, 2009 at 12:01:19PM +0200, Laurent Mazet wrote: Package: octave3.0 Version: 1:3.0.1-7 Arch: i386 Severity: grave Hi, I've just realized that I can multiply a real 2x2 matrix by a complex vector. Uh, yes. Why shouldn't this work? Or in other words, how do you distinguish the real matrix from a complex matrix with its complex coefficients being zero [ 1, 2; 3,4] is the same as [1+0i, 2+0i; 3+0i, 4+0i], isn't it? Sorry, I just realized that the problem was the result, not the act of multiplication. Anyway, which BLAS/ATLAS libraries are installed on your system? Thomas -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#525113: [Pkg-octave-devel] Bug#525113: Bug#525113: Inconsistant complex matrix multiplication
Hi Thomas, you was right, my problem is inthe atlas library: $ LD_LIBRARY_PATH=/usr/lib /usr/bin/octave -q --eval '[1 2; 3 4] * [1; 1i]' ans = 1 + 2i 3 + 4i $ lmt-linux ~ $ /usr/bin/octave -q --eval '[1 2; 3 4] * [1; 1i]' ans = 1. + 0.i 3. + 0.i $ ldd /usr/bin/octave | grep -i lapack liblapack.so.3gf = /usr/lib/sse2/atlas/liblapack.so.3gf (0xb653f000) $ dpkg -S /usr/lib/sse2/atlas/liblapack.so.3gf libatlas3gf-sse2: /usr/lib/sse2/atlas/liblapack.so.3gf $ dpkg -l libatlas3gf-sse2 ... +++-==-==- ii libatlas3gf-ss 3.6.0-24 Automatically Tuned Linear Algebra Software, Does I need to make a follow-up to the atlas package bug-report system? Regards, Laurent Quoting Thomas Weber thomas.weber.m...@gmail.com: On Wed, Apr 22, 2009 at 11:04:14PM +0200, Thomas Weber wrote: On Wed, Apr 22, 2009 at 12:01:19PM +0200, Laurent Mazet wrote: Package: octave3.0 Version: 1:3.0.1-7 Arch: i386 Severity: grave Hi, I've just realized that I can multiply a real 2x2 matrix by a complex vector. Uh, yes. Why shouldn't this work? Or in other words, how do you distinguish the real matrix from a complex matrix with its complex coefficients being zero [ 1, 2; 3,4] is the same as [1+0i, 2+0i; 3+0i, 4+0i], isn't it? Sorry, I just realized that the problem was the result, not the act of multiplication. Anyway, which BLAS/ATLAS libraries are installed on your system? Thomas -- Dr. Laurent Mazet -=- Use the source, Luke -=- ma...@softndesign.org -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#525113: [Pkg-octave-devel] Bug#525113: Bug#525113: Inconsistant complex matrix multiplication
On Thu, Apr 23, 2009 at 01:28:36PM +0200, Laurent Mazet wrote: Hi Thomas, you was right, my problem is inthe atlas library: Thanks for the follow-up. $ LD_LIBRARY_PATH=/usr/lib /usr/bin/octave -q --eval '[1 2; 3 4] * [1; 1i]' ans = 1 + 2i 3 + 4i $ lmt-linux ~ $ /usr/bin/octave -q --eval '[1 2; 3 4] * [1; 1i]' ans = 1. + 0.i 3. + 0.i $ ldd /usr/bin/octave | grep -i lapack liblapack.so.3gf = /usr/lib/sse2/atlas/liblapack.so.3gf (0xb653f000) $ dpkg -S /usr/lib/sse2/atlas/liblapack.so.3gf libatlas3gf-sse2: /usr/lib/sse2/atlas/liblapack.so.3gf $ dpkg -l libatlas3gf-sse2 ... +++-==-==- ii libatlas3gf-ss 3.6.0-24 Automatically Tuned Linear Algebra Software, Does I need to make a follow-up to the atlas package bug-report system? No, we will handle the reassignment. I want to test some things myself before assigning this to ATLAS. Thomas -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#525113: [Pkg-octave-devel] Bug#525113: Bug#525113: Inconsistant complex matrix multiplication
* Thomas Weber thomas.weber.m...@gmail.com [2009-04-22 23:04]: On Wed, Apr 22, 2009 at 12:01:19PM +0200, Laurent Mazet wrote: Package: octave3.0 Version: 1:3.0.1-7 Arch: i386 Severity: grave Hi, I've just realized that I can multiply a real 2x2 matrix by a complex vector. Uh, yes. Why shouldn't this work? Or in other words, how do you distinguish the real matrix from a complex matrix with its complex coefficients being zero [ 1, 2; 3,4] is the same as [1+0i, 2+0i; 3+0i, 4+0i], isn't it? I think Laurent meant I've just realized that I CANNOT multiply [...] -- Rafael -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
