org.simulator.math.odes
Class EulerMethod

java.lang.Object
  org.simulator.math.odes.AbstractDESSolver
      org.simulator.math.odes.EulerMethod

All Implemented Interfaces:

java.io.Serializable, org.apache.commons.math.ode.events.EventHandler, DelayValueHolder, DESSolver

public class EulerMethod
extends AbstractDESSolver

In this class the Euler method for integration a differential equation system is implemented.

Since:

0.9

Version:

$Rev: 146 $

Author:

Andreas Dräger

See Also:

Serialized Form

Field Summary

Fields inherited from class org.simulator.math.odes.AbstractDESSolver

listenerList

Fields inherited from interface org.apache.commons.math.ode.events.EventHandler

CONTINUE, RESET_DERIVATIVES, RESET_STATE, STOP

Constructor Summary

EulerMethod()
default constructor

EulerMethod(double stepSize)

EulerMethod(double stepSize, boolean nonnegative)

EulerMethod(EulerMethod eulerMethod)
clone constructor

Method Summary

EulerMethod	clone()
double[]	computeChange(DESystem DES, double[] yPrev, double t, double stepSize, double[] change, boolean steadyState) Computes the change for a given system at the current time with the current setting for the integration step size.
java.lang.String	getName() This gives a human-readable name of this solver that can be displayed in a graphical user interface.
protected boolean	hasSolverEventProcessing()

Methods inherited from class org.simulator.math.odes.AbstractDESSolver

additionalResults, addPropertyChangeListener, checkSolution, checkSolution, computeDelayedValue, computeNextState, eventOccurred, firePropertyChange, g, getSerialversionuid, getStepSize, inBetweenSteps, initResultMatrix, initResultMatrix, initResultMatrix, isIncludeIntermediates, isNonnegative, isUnstable, numSteps, processEvents, processEventsAndRules, processRules, removePropertyChangeListener, reset, resetState, setIncludeIntermediates, setNonnegative, setStepSize, setUnstableFlag, solve, solve, solve, solve

Methods inherited from class java.lang.Object

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

Constructor Detail

EulerMethod

public EulerMethod()

default constructor

EulerMethod

public EulerMethod(double stepSize)

Parameters:

stepSize -

EulerMethod

public EulerMethod(double stepSize,
                   boolean nonnegative)

Parameters:

stepSize -

the - nonnegative flag of the super class @see org.sbml.simulator.math.odes.AbstractDESSolver

EulerMethod

public EulerMethod(EulerMethod eulerMethod)

clone constructor

Parameters:

eulerMethod -

Method Detail

getName

public java.lang.String getName()

Description copied from class: AbstractDESSolver

This gives a human-readable name of this solver that can be displayed in a graphical user interface.

Specified by:

getName in class AbstractDESSolver

Returns:

A name that describes the underlying algorithm.

computeChange

public double[] computeChange(DESystem DES,
                              double[] yPrev,
                              double t,
                              double stepSize,
                              double[] change,
                              boolean steadyState)
                       throws org.apache.commons.math.ode.DerivativeException

Description copied from class: AbstractDESSolver

Computes the change for a given system at the current time with the current setting for the integration step size.

Specified by:

computeChange in class AbstractDESSolver

Parameters:

DES - The system to be simulated.

yPrev - The current state of the system.

t - The current simulation time.

change - The vector for the resulting change of the system.

Returns:

The change.

Throws:

org.apache.commons.math.ode.DerivativeException

clone

public EulerMethod clone()

Specified by:

clone in interface DESSolver

Specified by:

clone in class AbstractDESSolver

Returns:

the cloned solver

hasSolverEventProcessing

protected boolean hasSolverEventProcessing()

Specified by:

hasSolverEventProcessing in class AbstractDESSolver

Returns:

Does the solver do the event processing itself?