FirstOrderIntegrator (Apache Commons Math 3.6.1 API)

All Superinterfaces:

ODEIntegrator

All Known Implementing Classes:

AbstractIntegrator, AdamsBashforthIntegrator, AdamsIntegrator, AdamsMoultonIntegrator, AdaptiveStepsizeIntegrator, ClassicalRungeKuttaIntegrator, DormandPrince54Integrator, DormandPrince853Integrator, EmbeddedRungeKuttaIntegrator, EulerIntegrator, GillIntegrator, GraggBulirschStoerIntegrator, HighamHall54Integrator, LutherIntegrator, MidpointIntegrator, MultistepIntegrator, RungeKuttaIntegrator, ThreeEighthesIntegrator
```
public interface FirstOrderIntegrator
extends ODEIntegrator
```
This interface represents a first order integrator for differential equations.
The classes which are devoted to solve first order differential equations should implement this interface. The problems which can be handled should implement the FirstOrderDifferentialEquations interface.

Since:

1.2

See Also:
FirstOrderDifferentialEquations, StepHandler, EventHandler

Method Summary

Methods
Modifier and Type	Method and Description
`double`	`integrate(FirstOrderDifferentialEquations equations, double t0, double[] y0, double t, double[] y)` Integrate the differential equations up to the given time.

Methods inherited from interface org.apache.commons.math3.ode.ODEIntegrator
addEventHandler, addEventHandler, addStepHandler, clearEventHandlers, clearStepHandlers, getCurrentSignedStepsize, getCurrentStepStart, getEvaluations, getEventHandlers, getMaxEvaluations, getName, getStepHandlers, setMaxEvaluations

- Method Detail
  - integrate
```
double integrate(FirstOrderDifferentialEquations equations,
               double t0,
               double[] y0,
               double t,
               double[] y)
                 throws DimensionMismatchException,
                        NumberIsTooSmallException,
                        MaxCountExceededException,
                        NoBracketingException
```
    Integrate the differential equations up to the given time.
    This method solves an Initial Value Problem (IVP).
    
    Since this method stores some internal state variables made available in its public interface during integration (ODEIntegrator.getCurrentSignedStepsize()), it is not thread-safe.
    
    Parameters:
    equations - differential equations to integrate
    t0 - initial time
    y0 - initial value of the state vector at t0
    t - target time for the integration (can be set to a value smaller than t0 for backward integration)
    y - placeholder where to put the state vector at each successful step (and hence at the end of integration), can be the same object as y0
    
    Returns:
    stop time, will be the same as target time if integration reached its target, but may be different if some EventHandler stops it at some point.
    
    Throws:
    
    DimensionMismatchException - if arrays dimension do not match equations settings
    
    NumberIsTooSmallException - if integration step is too small
    
    MaxCountExceededException - if the number of functions evaluations is exceeded
    
    NoBracketingException - if the location of an event cannot be bracketed

Interface FirstOrderIntegrator

Method Summary

Methods inherited from interface org.apache.commons.math3.ode.ODEIntegrator

Method Detail

integrate