Package org.opensourcephysics.numerics

Interface ODEAdaptiveSolver

All Superinterfaces:

ODESolver

All Known Subinterfaces:

ODEInterpolationSolver

All Known Implementing Classes:

CashKarp45, DormandPrince45, ODEBisectionEventSolver, ODEMultistepSolver, RK45, RK45MultiStep

public interface ODEAdaptiveSolver
extends ODESolver

ODEAdaptiveSolver extends the ODE solver to add adaptive step size capabilities. Adaptive ODE solvers adjust the step size until that the desired tolerance is reached. The client's state can effect the internal state of the ODE solver. Some adaptive solvers advance an internal copy of client's state. This internal state is then copied to the client after every step. Other solvers estimate the optimal time step using the client's state. Clients should therfore always invoke the solver's initialize method after setting their initial conditions.

Field Summary

Fields

Modifier and Type	Field	Description
static int	BISECTION_EVENT_NOT_FOUND
static int	DID_NOT_CONVERGE
static int	NO_ERROR

Method Summary

Modifier and Type	Method	Description
int	getErrorCode()	Gets the error code.
double	getTolerance()	Gets the tolerance of the adaptive ODE sovler.
void	setTolerance(double tol)	Sets the tolerance of the adaptive ODE sovler.

Methods inherited from interface org.opensourcephysics.numerics.ODESolver

getStepSize, initialize, setStepSize, step

Field Detail

NO_ERROR

static final int NO_ERROR

See Also:

Constant Field Values

DID_NOT_CONVERGE

static final int DID_NOT_CONVERGE

See Also:

Constant Field Values

BISECTION_EVENT_NOT_FOUND

static final int BISECTION_EVENT_NOT_FOUND

See Also:

Constant Field Values

Method Detail

setTolerance

void setTolerance(double tol)

Sets the tolerance of the adaptive ODE sovler.

Parameters:

tol - the tolerance

getTolerance

double getTolerance()

Gets the tolerance of the adaptive ODE sovler.

Returns:

getErrorCode

int getErrorCode()

Gets the error code. Error codes: ODEAdaptiveSolver.NO_ERROR ODEAdaptiveSolver.DID_NOT_CONVERGE ODEAdaptiveSolver.BISECTION_EVENT_NOT_FOUND=2;

Returns:

int