nlsrk-package: Runge-Kutta package for nls

Description Details Univariate functions (single ODE) Multivariate functions (ODEs system) Utility data Note Author(s) References See Also

Description

Performs univariate or multivariate computation of a single ODE or of a set of ODE (ordinary differential equations)

Details

Package: nlsrk
Version: 1.0
Date: 2006-09-07
Depends: R (>= 1.8.0)
Suggests:
License: GPL version 2 or newer
URL: none
Built: R 2.2.1; ; 2006-02-22 19:52:45; windows

Univariate functions (single ODE)

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dfdt                    Right Side of a first order ODE
frunge                  Numeric solution of an ODE (univariate)

Multivariate functions (ODEs system)

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multirunge              Runge-Kutta numerical solver (single point, multivariate)
evrunge                 Numerical Runge-Kutta Solver (multi point, multivariate)
prepare                 Prepares a multivariate data set for use in nls / evrunge
sys                     Right side of a first order differential equation system (multivariate)

Utility

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nlscontour		Draws a contourplot of the sum of squares function around a couple of parameters
summary.nlsgrid         Details on an nlsgrid

data

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logis                   Logistic growth of bacteria
syslin                  Pharmacokinetics : intramuscular injection
syslin.don              Intra muscular injection (columns)

Note

nlsrk provides to nls(stats) an evaluation of functions defined by first order Ordinary Differential Equations (ODEs). For a single ODE use frunge and edit dfdt. For a system of ODEs, use the multivariate functions evrunge and edit sys. The method used in both cases is the Runge-Kutta 4 method. The result is not guaranteed especially for "stiff" systems of equations.

Author(s)

Jean-Sebastien Pierre <[email protected]> Maintainer: Jean-Sebastien Pierre <[email protected]>

References

Numerical Recipes http://www.nr.com

See Also

nls


nlsrk documentation built on June 24, 2017, 1:02 a.m.