Path: news.mathworks.com!not-for-mail
From: "carlos lopez" <clv2clv_00000000_@adinet.com.uy>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Seeking numerical package for quadruple precision...
Date: Thu, 9 Aug 2007 20:07:56 +0000 (UTC)
Organization: The MathWorks, Inc.
Lines: 23
Message-ID: <f9fs6s$5rh$1@fred.mathworks.com>
References: <f6etbs$2of$1@news.Stanford.EDU>
Reply-To: "carlos lopez" <clv2clv_00000000_@adinet.com.uy>
NNTP-Posting-Host: webapp-01-blr.mathworks.com
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Trace: fred.mathworks.com 1186690076 6001 172.30.248.36 (9 Aug 2007 20:07:56 GMT)
X-Complaints-To: news@mathworks.com
NNTP-Posting-Date: Thu, 9 Aug 2007 20:07:56 +0000 (UTC)
X-Newsreader: MATLAB Central Newsreader 870136
Xref: news.mathworks.com comp.soft-sys.matlab:423256


"Vista" <abc@gmai.com> wrote in message
<f6etbs$2of$1@news.Stanford.EDU>...
> Hi all,
> 
> I have some computation and simulation which need
quadruple precision. I 
> mean, the double precision is not enough, while high
precision such as 1000 
> digits is not needed, and that's too slow. 
I agree with this
> I guess quadruple precision exactly fits my problem and
should be much faster than double precision.
I disagree with this.
However, you might want to consider other alternatives aside
from "quadruple precision". From
http://crd.lbl.gov/~dhbailey/mpdist/ you can look at
double-double precision, quad-double precision, etc. They
manage to represent higher precision numbers with two or
four ordinary double precision numbers.
I knew of some ports of this stuff to the matlab environment.
Regards
Carlos