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From: "carlos lopez" <clv2clv_00000000_@adinet.com.uy>
Newsgroups: comp.soft-sys.matlab
Subject: Re: precision of numbers?
Date: Thu, 9 Aug 2007 20:21:50 +0000 (UTC)
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> Is it possible to tell Matlab to use greater precision for its
> computations?
What you need is an expanded _range_ for the representable
numbers, and not _greater precision_. The latter is related
with the machine epsilon (which in turn is related with the
number of bits of the mantissa) while the former is related
to the maximum/minimum expontent 
Check the FEX for the Multiple Precision toolbox by Ben
Barrowes; it might be helpful.
Regards
Carlos