nl.tudelft.simulation.jstats.ode.integrators
Class RungeKuttaCashCarp

java.lang.Object
  nl.tudelft.simulation.jstats.ode.integrators.NumericalIntegrator
      nl.tudelft.simulation.jstats.ode.integrators.RungeKuttaCashCarp

public class RungeKuttaCashCarp

extends NumericalIntegrator

The RungeKuttaCashCarp.java numerical integrator.

(c) copyright 2004 Delft University of Technology , the Netherlands.
See for project information www.simulation.tudelft.nl
License of use: General Public License (GPL) , no warranty

Since:

1.4

Version:

1.0 May 12, 2004

Author:

Alexander Verbraeck

Field Summary

protected static double[]	a the parameters for a_i, in f(x_n + a_i h, .)
protected static double[][]	b the parameters for b_ij, in f(., y_n + b_p1 k1 + bp2 k2 + ...)
protected static double[]	c the parameters for c_i, in y_n+1 = y_n + c_1 k_1 + c_2 k_2 + ...
protected static double[]	c4 the parameters for c4_i, in y_n+1 = y_n + c4_1 k_1 + c4_2 k_2 + ...
protected static int	nk the numer of k-s in the method

Fields inherited from class nl.tudelft.simulation.jstats.ode.integrators.NumericalIntegrator

ADAMS, DEFAULT_INTEGRATOR, equation, error, EULER, GILL, HEUN, MILNE, RUNGEKUTTA3, RUNGEKUTTA4, RUNGEKUTTACASHCARP, RUNGEKUTTAFEHLBERG, timeStep

Constructor Summary

RungeKuttaCashCarp(double timeStep, DifferentialEquationInterface equation)
constructs a new RungeKuttaCashCarp

Method Summary

double[]

next(double x, double[] y) computes the next value

Methods inherited from class nl.tudelft.simulation.jstats.ode.integrators.NumericalIntegrator

add, add, add, add, add, getError, getTimeStep, multiply, resolve, setTimeStep

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

a

protected static double[] a

the parameters for a_i, in f(x_n + a_i h, .)

b

protected static double[][] b

the parameters for b_ij, in f(., y_n + b_p1 k1 + bp2 k2 + ...)

c

protected static double[] c

the parameters for c_i, in y_n+1 = y_n + c_1 k_1 + c_2 k_2 + ...

c4

protected static double[] c4

the parameters for c4_i, in y_n+1 = y_n + c4_1 k_1 + c4_2 k_2 + ...

nk

protected static int nk

the numer of k-s in the method

Constructor Detail

RungeKuttaCashCarp

public RungeKuttaCashCarp(double timeStep,
                          DifferentialEquationInterface equation)

constructs a new RungeKuttaCashCarp

Parameters:

timeStep - the timeStep

equation - the differentialEquation

Method Detail

next

public double[] next(double x,
                     double[] y)

Description copied from class: NumericalIntegrator

computes the next value

Specified by:

next in class NumericalIntegrator

Parameters:

x - the x value corresponding to the last y-value computed

y - the last y value

Returns:

the new value

See Also:

#next(double,double[])