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[Octave-bug-tracker] [bug #52285] inv(0) gives 0 (instead of inf)


From: Rik
Subject: [Octave-bug-tracker] [bug #52285] inv(0) gives 0 (instead of inf)
Date: Thu, 26 Oct 2017 11:24:56 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:55.0) Gecko/20100101 Firefox/55.0

Update of bug #52285 (project octave):

                  Status:                    None => Confirmed              

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Follow-up Comment #2:

There have been some previous reports on this.

See bug #49690: inv(inf) behaves differently from inf^-1, 1/inf, inf\1

See bug #51246: pinv(0) different from Matlab

As of 10/26/17 and hg id 857b553177a5, I get


octave:2> inv (Inf)
warning: matrix singular to machine precision
ans = 0
octave:3> inv (0)
warning: matrix singular to machine precision
ans = 0
octave:4> 1/0
warning: division by zero
ans = Inf
octave:5> pinv (0)
ans = Inf


The only problem is 'inv (0)'.



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