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Re: Extended precision


From: Quentin Spencer
Subject: Re: Extended precision
Date: Mon, 27 Feb 2006 16:08:29 -0600
User-agent: Mozilla Thunderbird 1.0.7-1.1.fc4 (X11/20050929)

Arvid Rosén wrote:

Hi!
I am frequently working with ill-conditioned state-space systems, and the matrix calculations often lead to problems. Are there any ways to get increasted or extended precision in Octave? 128-bit doubles or more would probably help alot in this case.


I'm no expert on the internals of octave, but as I understand it, it's possible to create new data types, like the integer types that now exist in octave, and the fixed-point code in octave-forge. However, you would need to make sure the linear algebra libraries you are using (blas, lapack, or atlas) can also support extended precision. For what it's worth, fftw now supports long double types.

-Quentin



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