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Re: matrix singular to machine precision, rcond = nan


From: Quentin Spencer
Subject: Re: matrix singular to machine precision, rcond = nan
Date: Wed, 24 May 2006 15:40:24 -0500
User-agent: Thunderbird 1.5.0.2 (X11/20060501)

Dmitri A. Sergatskov wrote:
On 5/24/06, Quentin Spencer <address@hidden> wrote:
From:MOUNIER Stephane, address@hidden <mailto:address@hidden>
> Hi, I use octave (version 2.9.5 on FC5) on several computer and I encounter the following
...
libraries on all of the computers? In addition to the standard Fedora
lapack, there is also atlas, which might be computing rcond differently.


I am wandering if different flavors of atlas (atlas-3dnow vs atlas-sse e.g.)
could handle this differently, so Athlon XP and P4 could plausibly give
different results here.


I thought the same thing, but I tried it on a P-III with atlas-sse and P4 with atlas-sse2, and it worked in both cases. I didn't try all possible libraries, though.

Quentin



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