From help-request at octave dot org Wed Nov 3 15:21:49 2004 Subject: Re: Inverse Matrix Function appears a bit wonky From: Glenn Golden To: help-octave at bevo dot che dot wisc dot edu Date: Wed, 03 Nov 2004 14:21:02 -0700 "John W. Eaton" writes: > On 3-Nov-2004, John W. Eaton wrote: > > | If there is no warning on your system, I suspect your > | version of Octave is linked with some version of LAPACK that does not > | return the proper error code when a singular matrix is detected during > | the factorizaion leading to the computation of the inverse. > > Oops. Now I see that if you request an output: > > x = inv (x) > > the warning is suppressed, but if you don't: > > inv (x) > > (result assigned to "ans"), then you should see the warning. That's > an error. The warning should only be supressed if you request 2 > output arguments (the inverse AND rcond). > > I'll fix this for 2.1.61. > John, FWIW: I also don't see the warning, even if no assignment done. I'm running 2.1.57. My octave_config output below. 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