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[Setzer.Woodrow at epamail.epa.gov]

CRAN now contains a new package for numerically solving ordinary
differential equations.  The package (odesolve_0.5-3) currently provides an
interface to the solver "LSODA" written by Linda Petzold and Alan
Hindmarsh.  LSODA is an adaptive solver, switching between methods
appropriate for non-stiff and stiff systems as the problem requires.  In
this implementation, the system of ODEs are written as an R function.  A
vector of parameters may be passed to the function, making it relatively
easy to use lsoda in functions to be passed to various R optimizers.

R. Woodrow Setzer, Jr.                                            Phone:
(919) 541-0128
Experimental Toxicology Division                       Fax:  (919) 541-5394
Pharmacokinetics Branch
NHEERL MD-74; US EPA; RTP, NC 27711

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