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[Octave-bug-tracker] [bug #54484] Difference in divide by zero warning

From: Rik
Subject: [Octave-bug-tracker] [bug #54484] Difference in divide by zero warning
Date: Fri, 10 Aug 2018 12:40:59 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0

Follow-up Comment #4, bug #54484 (project octave):

I don't think we need to have the exact same return matrix.  However, it might
be useful to return all NaNs so that subsequent calculations are impossible.

Under Octave, someone might be do a division of a singular matrix in the midst
of a chain of computations and an all zeros matrix might allow processing to

Simple example:

x = ones (2);
y = zeros (2);
z = x / y;
z = z + 5

z =

   5   5
   5   5

If you are running a script in batch mode, or otherwise fail to see the
warning message, then you might think the end result is correct.


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