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View Full Version : Re: [LF] Runge-Kutta 4 (or 4-5 adaptive) Fortran 90 code


Lahey Support
08-15-2003, 01:24 AM
At 2/18/00 at 01:21 PM, Aleksandar Donev wrote:

>I need a Fortran 90 Runge-Kutta routine for a computational physics class
>at ...


Have you tried looking here:

http://math.nist.gov/gams/index.html

GAMS is an index site of mathematical software that is readily
available. The site is maintained by the National Institute of Standards
and Technology.

Not all entries are freely distributable; however, a search on "Runge AND
Kutta" found this one:

-----------------------------------------------------------------------
DERKF

Solves a system of first order ordinary differential equations with arbitrary
initial conditions by a Runge-Kutta method.

Classes : I1a1a. One-step methods (e.g., Runge-Kutta) for general,
nonstiff or mildly stiff initial value problems for
ordinary differential equations

Type : Fortran subroutine in CMLIB library (DEPAC sublibrary).
Access : Public domain. Portable.
Precision: Single.

Usage : CALL DERKF(F,NEQ,T,Y,TOUT,INFO,RTOL,ATOL,IDID,RWORK,LRW ,
IWORK,LIW,RPAR,
IPAR)

Details : Documentation Fullsource Source
Sites : (1) ARNO (2) CAMSUN
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It is probably Fortran 90 by being Fortran 77, if that will meet your needs.


--
Michael Prager [address removed]
NOAA Beaufort Laboratory
Beaufort, North Carolina 28516 USA

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