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[Octave-bug-tracker] [bug #31773] numerical instability in the pinv (Moo


From: anonymous
Subject: [Octave-bug-tracker] [bug #31773] numerical instability in the pinv (Moore-Penrose inverse) function
Date: Mon, 13 Dec 2010 18:06:23 +0000
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; nl; rv:1.9.2.12) Gecko/20101026 SUSE/3.6.12-0.7.1 Firefox/3.6.12

Follow-up Comment #3, bug #31773 (project octave):

Please find in the attachment the data producing the error reported. 

Note as well that sigmas and sigmac should be, according to the underlying
mathematical equations, identic. 

I do not believe that 5th and later decimal differences do lead to results
differing in this order of magnitude. This is a bug and not some numerical
instability acceptable within some limits. 

NB - The payware alternative (Matlab) does produce identic values for all
results. 

(file #22196)
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Additional Item Attachment:

File name: Example                        Size:2 KB


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