[Octave-bug-tracker] [bug #47415] out of memory negating a permutation matrix

[John W. Eaton]

Follow-up Comment #16, bug #47415 (project octave):

Yes, Matlab does not have permutation matrices.  So I think the question is,
do we make the result of things like


a = rand (2);
[q, r, p] = qr (a);
neg_p = -p;
1 ./ neg_p;


produce the same result as Matlab, or not?

Even though Matlab will not display the -0, I think it will produce -Inf for
the division by -0 because it does compute the -0, it's just not displaying it
directly.


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