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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: |
Mon, 19 Apr 2010 03:20:17 -0400 |
On Mon, Apr 19, 2010 at 3:11 AM, Jaroslav Hajek <address@hidden> wrote:
> One minor drawback I can immediately see is that these formulas don't
> always reduce to plain tanh (R) when I = 0. Indeed, the result may be
> a bit off even for small numbers:
>
> octave:1> tanh(complex(1,0)) - tanh(1)
> ans = 0
> octave:2> testgsltanh(complex(1,0)) - tanh(1)
> ans = 1.1102e-16
Isn't that less than machine precision:
> tanh(1)*eps
ans = 1.6911e-16
The result isn't complex. [since sin(0) is 0].
--judd
- Re: Same .m file: different results with different versions of Octave, (continued)
- 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, 2010/04/17
- 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 <=
- 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, 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, 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, 2010/04/18
- 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, Juergen Rose, 2010/04/19
- 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, Søren Hauberg, 2010/04/19