[R] Differential Equations Using R?

[Prof Brian D Ripley]

On Mon, 10 Sep 2001 nfruge at macalester.edu wrote:

> To whom it may concern,
>         I am a student at Macaleste College, and next semester Macalester
> is going to offer a course for CellBio that is mainly statistically based.
> For the most part the students will be using R for analysis. The problem is
> there will be some simple differential equations for the students to solve.
> The committee that in charge of the classes corriculam would like only to
> have to use one software package "R" for the entire corse. Thus the
> students will not have to learn another platform in order to solve
> differential equations. I have been nominated to find out if there exists
> such a program for "R". Hence the question: Does there exist a program,
> which has been written for R, where differential equations can be solved
> numerically? If there is please contact me at your convience on where I may
> find this program. If there is not such a program would it be simpler to
> write such a program or to just learn how to use MatLab or another math
> program? Your input would be greatly appreciated. Thank you all for your
> time.

Have you looked at the odesolve package on CRAN?

auk% cat odesolve/DESCRIPTION
Package: odesolve
Version: 0.5-5
Date: 2001/05/09
Title: Solvers for Ordinary Differential Equations
Author: R. Woodrow Setzer <setzer.woodrow at epa.gov> with fixups by Martin
Maechler <maechler at stat.math.ethz.ch>
Maintainer: R. Woodrow Setzer <setzer.woodrow at epa.gov>
Depends: R (>= 1.0.0)
Description: This package provides an interface for the ODE solver lsoda.
        ODEs are expressed as R functions.
License: GPL version 2

Looks like it meets your needs.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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