Message-ID: <4937E241.1000106@cam.ac.uk>
Date: 2008-12-04T13:59:29Z
From: robin hankin
Subject: small numbers
In-Reply-To: <20081204132629.267240@gmx.net>
Hi
use the logarithmic representation for your problem.
The Brobdingnag package uses such a form in a (more-or-less)
user-transparent manner.
HTH
rksh
Marc Jekel wrote:
> Dear R Fans,
>
> I have a simple probem but cannot find any reference to the soultion.
>
> I want to do calculations with small numbers (for max likelihood estimations). The lowest value R is storing by default is 1*10^-323, a smaller numer like 1*10^-324 is stored as a 0. How can I circumvent this problem? Is there a way to define how small a number can be in R.
>
> Thanks for a reply in advance,
>
> Marc
>
--
Robin K. S. Hankin
Uncertainty Analyst
University of Cambridge
19 Silver Street
Cambridge CB3 9EP
01223-764877