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Re: Same .m file: different results with different versions of Octave
From: |
Judd Storrs |
Subject: |
Re: Same .m file: different results with different versions of Octave |
Date: |
Sat, 17 Apr 2010 11:59:33 -0400 |
I suspect you are correct that tanh seems to be broken in octave. What
I see is that the Z() function is always returning NaN and the NaN
come from the tanh(). The problem can be reproduced with octave I have
on my machine (Octave 3.0.5, 3.2.3, 3.3.51+, Ubuntu 9.10 64-bit)
> tanh(50000+50000i)
NaN
But in Matlab:
> tanh(50000+50000i)
1
I suspect that you're seeing differences in the C math libraries
between the machines. This may be a bug in libc related to these
(supposedly fixed) bugs from 2005:
http://lists.debian.org/debian-glibc/2005/09/msg00097.html
https://bugzilla.redhat.com/show_bug.cgi?id=160759
FWIW the sample code testing libc fails on my machine. Perhaps it's
time to file a bug report.
--judd
- Same .m file: different results with different versions of Octave, Perseu, 2010/04/16
- Re: Same .m file: different results with different versions of Octave, Judd Storrs, 2010/04/16
- Re: Same .m file: different results with different versions of Octave, perseu.as, 2010/04/16
- Re: Same .m file: different results with different versions of Octave, Judd Storrs, 2010/04/16
- Re: Same .m file: different results with different versions of Octave, perseu.as, 2010/04/16
- Re: Same .m file: different results with different versions of Octave,
Judd Storrs <=
- Re: Same .m file: different results with different versions of Octave, perseu.as, 2010/04/17
- Re: Same .m file: different results with different versions of Octave, Thomas D. Dean, 2010/04/17
- Re: Same .m file: different results with different versions of Octave, Judd Storrs, 2010/04/18
- Re: Same .m file: different results with different versions of Octave, Thomas D. Dean, 2010/04/18
- Re: Same .m file: different results with different versions of Octave, perseu.as, 2010/04/18
- Re: Same .m file: different results with different versions of Octave, John W. Eaton, 2010/04/18
- Re: Same .m file: different results with different versions of Octave, Judd Storrs, 2010/04/18
- Re: Same .m file: different results with different versions of Octave, Jaroslav Hajek, 2010/04/19
- Re: Same .m file: different results with different versions of Octave, Judd Storrs, 2010/04/19
- Re: Same .m file: different results with different versions of Octave, Jaroslav Hajek, 2010/04/19