org.opensourcephysics.numerics.rk
Class Dopri853

java.lang.Object
  org.opensourcephysics.numerics.rk.AbstractExplicitRKSolverInterpolator
      org.opensourcephysics.numerics.rk.AbstractAdaptiveRKSolverInterpolator
          org.opensourcephysics.numerics.rk.Dopri853

All Implemented Interfaces:

ODESolverInterpolator

public class Dopri853
extends AbstractAdaptiveRKSolverInterpolator

Title: Dopri853 Description: Dorman Prince 8 ODE solver with 7th order dense output

Version:

December 2008

Author:

Francisco Esquembre (based on code by Andrei Goussev)

Constructor Summary

Dopri853(ODE _ode)

Method Summary

double[]

interpolate(double _time, boolean useLeftApproximation, double[] _state) Returns the value of the ODE's state[] at the given time in the provided state[] array.

Methods inherited from class org.opensourcephysics.numerics.rk.AbstractAdaptiveRKSolverInterpolator

reinitialize, setEstimateFirstStep, setMaximumStepSize, setTolerances, setTolerances

Methods inherited from class org.opensourcephysics.numerics.rk.AbstractExplicitRKSolverInterpolator

bestInterpolate, getCounter, getCurrentRate, getInternalStepSize, getMaximumTime, getODE, getStateMemory, getStepSize, initialize, internalStep, interpolate, interpolate, setMemoryLength, setStepSize

Methods inherited from class java.lang.Object

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

Constructor Detail

Dopri853

public Dopri853(ODE _ode)

Method Detail

interpolate

public double[] interpolate(double _time,
                            boolean useLeftApproximation,
                            double[] _state)

Description copied from interface: ODESolverInterpolator

Returns the value of the ODE's state[] at the given time in the provided state[] array. The time must be in the range of the memory or between the current time and getMaximumTime() for correct operation.

Specified by:

interpolate in interface ODESolverInterpolator

Specified by:

interpolate in class AbstractExplicitRKSolverInterpolator

Parameters:

_time - the time for the interpolation desired

useLeftApproximation - In case of doubt, approximate the value from the left (this is important if the state has a discontinuity at that instant of time, such as for DDEs)

_state - placeholder for the returned state

Returns:

The state provided as argument or null if there is no interpolation available at this time.