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[Octave-bug-tracker] [bug #42743] Inconsistent linear algebra results -


From: Ceral Paquet
Subject: [Octave-bug-tracker] [bug #42743] Inconsistent linear algebra results - openblas bug?
Date: Sat, 12 Jul 2014 17:44:44 +0000
User-agent: Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20140618 Firefox/24.0 PaleMoon/24.6.2

Follow-up Comment #1, bug #42743 (project octave):

Thinking about it, I guess it's mainly weird because the results differ from
run to run - albeit only in the 7th or 8th significant figure. Whereas in
double precision, the results are identical every run even with 30+ digits
displayed.

For quick reference, the Octave file is as follows:

% ----------------------- %
function weird_bug()

load data

X = pinv(A)*B;
num2str(norm(X,'fro'),32)


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