Package org.apache.commons.math3.ode
Class MultistepIntegrator.NordsieckInitializer
java.lang.Object
org.apache.commons.math3.ode.MultistepIntegrator.NordsieckInitializer
- All Implemented Interfaces:
StepHandler
- Enclosing class:
MultistepIntegrator
Specialized step handler storing the first step.
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
handleStep
(StepInterpolator interpolator, boolean isLast) Handle the last accepted stepvoid
init
(double t0, double[] y0, double time) Initialize step handler at the start of an ODE integration.
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Field Details
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count
private int countSteps counter. -
t
private final double[] tFirst steps times. -
y
private final double[][] yFirst steps states. -
yDot
private final double[][] yDotFirst steps derivatives.
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Constructor Details
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NordsieckInitializer
NordsieckInitializer(int nbStartPoints, int n) Simple constructor.- Parameters:
nbStartPoints
- number of start points (including the initial point)n
- problem dimension
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Method Details
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handleStep
public void handleStep(StepInterpolator interpolator, boolean isLast) throws MaxCountExceededException Handle the last accepted step- Specified by:
handleStep
in interfaceStepHandler
- Parameters:
interpolator
- interpolator for the last accepted step. For efficiency purposes, the various integrators reuse the same object on each call, so if the instance wants to keep it across all calls (for example to provide at the end of the integration a continuous model valid throughout the integration range, as theContinuousOutputModel
class does), it should build a local copy using the clone method of the interpolator and store this copy. Keeping only a reference to the interpolator and reusing it will result in unpredictable behavior (potentially crashing the application).isLast
- true if the step is the last one- Throws:
MaxCountExceededException
- if the interpolator throws one because the number of functions evaluations is exceeded
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init
public void init(double t0, double[] y0, double time) Initialize step handler at the start of an ODE integration.This method is called once at the start of the integration. It may be used by the step handler to initialize some internal data if needed.
- Specified by:
init
in interfaceStepHandler
- Parameters:
t0
- start value of the independent time variabley0
- array containing the start value of the state vectortime
- target time for the integration
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