I'm using an Apple and am dependent on the binaries on sourceforge to get
Octave.
I had to go back to Version 3.0.5 to find a version without the bug.
Scott Sands
--- On Sat, 8/22/09, nit_ar <nit...@hotmail.com> wrote:
From: nit_ar <nit...@hotmail.com>
Subject: Re: [OctDev] incorrect complex matrix multiplication results in Octave
3.2.2
To: octave-dev@lists.sourceforge.net, shuhua.zh...@gmail.com
Date: Saturday, August 22, 2009, 3:01 PM
Hello Shuhua Zhang,
I think that this is not octaveforge related issue. It is probably an
octave bug !
I think you should report it to bug-oct...@octave.org (follow bug
reporting guidelines in http://www.gnu.org/software/octave/bugs.html)
You may also ask for some response from octave-maintain...@octave.org.
Regards
Nitzan Arazi
>[OctDev] incorrect complex matrix multiplication
results in Octave 3.2.2
>From: Shuhua Zhang <shuhua.zh...@gm...> - 2009-08-16 03:33
>
>Hi,
>
>I built octave 3.2.2 on my x86_64 desktop and x86 notebook a few
weeks
>ago.
>They passed all the tests.
>
>But I've just noticed some weird complex matrix multiplication
results
>on both
>the machines:
>octave:48> [1 0]*[i 0]'
>ans = 0 - 1i %% correct
>octave:49> [1 i]*[i 0]'
>ans = 0 + 1i %% incorrect, 0+1i=[i
>0]*[1 i]'
>
>The problem is that for nx1 row vectors a and b both with non-zero
>imaginary parts,
>a*b' turns out to be b*a', which is the conjugate of the correct
result.
>If either a or b
>are real, the result will be correct.
>
>I also checked out Octave 3.0.3, it didn't have this problem.
>
>So, is it a run time configuration problem, a build configuration
>problem, or a bug?
>Regards,
>Shuhua Zhang, Oct. 16, 2009
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