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[Octave-bug-tracker] [bug #41454] Inaccurate/incorrect result for invers


From: Max G.
Subject: [Octave-bug-tracker] [bug #41454] Inaccurate/incorrect result for inverse of symmetric matrix
Date: Mon, 17 Mar 2014 08:50:58 +0000
User-agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/32.0.1700.107 Chrome/32.0.1700.107 Safari/537.36

Follow-up Comment #1, bug #41454 (project octave):

I can reproduce that error. Anyhow, I'm confused about the small differences
that occured.


octave invprecision.m 
GNU Octave, version 3.8.0
Copyright (C) 2013 John W. Eaton and others.
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There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  For details, type 'warranty'.

Octave was configured for "i686-pc-linux-gnu".

Additional information about Octave is available at http://www.octave.org.

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matrixSize =

   239   239

matrixRank =  239
matrixCond =    4.9337e+07
machineEps =    2.2204e-16
withBackslashEye =

   3.7558e-09   3.4613e-08

withInv =

   3.8905e-01   3.5550e-08

symmetryHs = 0
symmetryMyInv =    2.2922e-08
symmetryOctInv =  0.18704



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