ButcherArrayProvider
, ODEIntegrator
public class ThreeEighthesIntegrator extends RungeKuttaIntegrator
This method is an explicit Runge-Kutta method, its Butcher-array is the following one :
0 | 0 0 0 0 1/3 | 1/3 0 0 0 2/3 |-1/3 1 0 0 1 | 1 -1 1 0 |-------------------- | 1/8 3/8 3/8 1/8
Constructor | Description |
---|---|
ThreeEighthesIntegrator(double step) |
Simple constructor.
|
Modifier and Type | Method | Description |
---|---|---|
protected org.hipparchus.ode.nonstiff.ThreeEighthesStateInterpolator |
createInterpolator(boolean forward,
double[][] yDotK,
ODEStateAndDerivative globalPreviousState,
ODEStateAndDerivative globalCurrentState,
EquationsMapper mapper) |
Create an interpolator.
|
double[][] |
getA() |
Get the internal weights from Butcher array (without the first empty row).
|
double[] |
getB() |
Get the external weights for the high order method from Butcher array.
|
double[] |
getC() |
Get the time steps from Butcher array (without the first zero).
|
acceptStep, addEventHandler, addEventHandler, addStepHandler, clearEventHandlers, clearStepHandlers, computeDerivatives, getCurrentSignedStepsize, getCurrentStepStart, getEquations, getEvaluations, getEvaluationsCounter, getEventHandlers, getMaxEvaluations, getName, getStepHandlers, getStepSize, getStepStart, initIntegration, isLastStep, resetOccurred, sanityChecks, setIsLastStep, setMaxEvaluations, setStateInitialized, setStepSize, setStepStart
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
integrate, integrate
integrate, singleStep
public ThreeEighthesIntegrator(double step)
step
- integration steppublic double[] getC()
public double[][] getA()
public double[] getB()
protected org.hipparchus.ode.nonstiff.ThreeEighthesStateInterpolator createInterpolator(boolean forward, double[][] yDotK, ODEStateAndDerivative globalPreviousState, ODEStateAndDerivative globalCurrentState, EquationsMapper mapper)
createInterpolator
in class RungeKuttaIntegrator
forward
- integration direction indicatoryDotK
- slopes at the intermediate pointsglobalPreviousState
- start of the global stepglobalCurrentState
- end of the global stepmapper
- equations mapper for the all equationsCopyright © 2016–2018 Hipparchus.org. All rights reserved.