From help-octave-request at bevo dot che dot wisc dot edu Thu Aug 30 17:37:27 2001
Subject: Re: Machine epsilon, Octave and Matlab
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Geraint Bevan <geraint dot p dot bevan dot itar at jsfmail dot p dot external dot lmco dot com>
Cc: "help-octave at bevo dot che dot wisc dot edu" <help-octave@bevo.che.wisc.edu>
Date: Thu, 30 Aug 2001 17:37:15 -0500

On 30-Aug-2001, Geraint Bevan <geraint dot p dot bevan dot itar at jsfmail dot p dot external dot lmco dot com> wrote:

| The original poster was actually Craig Stoudt enquiring about the
| difference between Matlab and Octave under Win2000. However, you are quite
| right about the result being the same on the SGI as on the Alpha:

Sorry, I lost track.

Now, are there any experts out that who know whether this difference
is something that is a bug (in the floating point implementation, not
Octave) or allowed by the standard?  It seems odd that 1/(1+one bit)
results in exactly 1, but maybe I should not be surprised.  Is this
due to the rounding mode and possibly having different defaults for
that on different systems?

jwe



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