org.apache.commons.math.ode.nonstiff
Class MidpointIntegrator

java.lang.Object
  extended by org.apache.commons.math.ode.AbstractIntegrator
      extended by org.apache.commons.math.ode.nonstiff.RungeKuttaIntegrator
          extended by org.apache.commons.math.ode.nonstiff.MidpointIntegrator
All Implemented Interfaces:
FirstOrderIntegrator, ODEIntegrator

public class MidpointIntegrator
extends RungeKuttaIntegrator

This class implements a second order Runge-Kutta integrator for Ordinary Differential Equations.

This method is an explicit Runge-Kutta method, its Butcher-array is the following one :

    0  |  0    0
   1/2 | 1/2   0
       |----------
       |  0    1
 

Since:
1.2
Version:
$Revision: 810196 $ $Date: 2009-09-01 15:47:46 -0400 (Tue, 01 Sep 2009) $
See Also:
EulerIntegrator, ClassicalRungeKuttaIntegrator, GillIntegrator

Field Summary
private static double[][] STATIC_A
          Internal weights Butcher array.
private static double[] STATIC_B
          Propagation weights Butcher array.
private static double[] STATIC_C
          Time steps Butcher array.
 
Fields inherited from class org.apache.commons.math.ode.AbstractIntegrator
eventsHandlersManager, stepHandlers, stepSize, stepStart
 
Constructor Summary
MidpointIntegrator(double step)
          Simple constructor.
 
Method Summary
 
Methods inherited from class org.apache.commons.math.ode.nonstiff.RungeKuttaIntegrator
integrate
 
Methods inherited from class org.apache.commons.math.ode.AbstractIntegrator
addEndTimeChecker, addEventHandler, addStepHandler, clearEventHandlers, clearStepHandlers, computeDerivatives, getCurrentSignedStepsize, getCurrentStepStart, getEvaluations, getEventHandlers, getMaxEvaluations, getName, getStepHandlers, requiresDenseOutput, resetEvaluations, sanityChecks, setEquations, setMaxEvaluations
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

STATIC_C

private static final double[] STATIC_C
Time steps Butcher array.


STATIC_A

private static final double[][] STATIC_A
Internal weights Butcher array.


STATIC_B

private static final double[] STATIC_B
Propagation weights Butcher array.

Constructor Detail

MidpointIntegrator

public MidpointIntegrator(double step)
Simple constructor. Build a midpoint integrator with the given step.

Parameters:
step - integration step


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