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From: ImageAnalyst <imageanalyst@mailinator.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: what kind of plot ?
Date: Sat, 14 May 2011 13:53:29 -0700 (PDT)
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Well I don't know about the numbers.  If you say they're good for you
then fine.  Just add this code after your code to visualize them

imshow(sigma, []);
% Enlarge figure to full screen.
set(gcf, 'Position', get(0,'Screensize'));
colormap(lines);
msgbox('done');