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Re: Differing results on right division

From: Damian Philipp
Subject: Re: Differing results on right division
Date: Thu, 09 Jun 2011 13:59:54 +0200
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv: Gecko/20110414 Lightning/1.0b2 Thunderbird/3.1.10

Hello Octave-Gurus,

I changed my implementation from using itpp to using liboctave (3.2.4,
but I get the same issues on 3.4.0). As there is no useable
operator/(Matrix, Matrix) -- gcc complains about an ambiguous overload
-- I again had to lift code from the octave sources. However, this time
I only had to copy xdiv(Matrix, Matrix), no work on any Matrix::*solve
was done.

And now guess what - I _still_ get differing results in Octave and my
program, even on identical input values.

Both used the same compiler, same atlas/lapack/... and are running on
the same machine. I have no more ideas left on how to debug this. Do you
have any expert input for me on this?

Damian Philipp

 University of Stuttgart, IPVS    phone: +49 711 685-88339
 Distributed Systems Group
 Universitaetsstrasse 38          address@hidden
 D-70569 Stuttgart, Germany

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