rk4sys: Classical Runge-Kutta for system of equations

In ecostate: State-Space Mass-Balance Model for Marine Ecosystems

Classical Runge-Kutta for system of equations

Description

Classical Runge-Kutta of order 4.

Usage

rk4sys(f, a, b, y0, n, Pars, ...)

Arguments

f	function in the differential equation y' = f(x, y); defined as a function R \times R^m \rightarrow R^m, where m is the number of equations.
a	starting time for the interval to integrate
b	ending time for the interval to integrate.
y0	starting values at time a
n	the number of steps from a to b.
Pars	named list of parameters passed to f
...	additional inputs to function f

Details

Classical Runge-Kutta of order 4 for (systems of) ordinary differential equations with fixed step size. Copied from pracma under GPL-3, with small modifications to work with RTMB

Value

List with components x for grid points between a and b and y an n-by-m matrix with solutions for variables in columns, i.e. each row contains one time stamp.

ecostate documentation built on April 3, 2025, 5:25 p.m.