Package org.hipparchus.ode

Interface ODEJacobiansProvider

All Superinterfaces:

NamedParameterJacobianProvider, OrdinaryDifferentialEquation, Parameterizable

public interface ODEJacobiansProvider
extends OrdinaryDifferentialEquation, NamedParameterJacobianProvider

Interface expanding first order differential equations in order to compute exactly the Jacobian matrices for partial derivatives equations.

Method Summary

Modifier and Type	Method	Description
double[][]	computeMainStateJacobian(double t, double[] y, double[] yDot)	Compute the Jacobian matrix of ODE with respect to state.
default double[]	computeParameterJacobian(double t, double[] y, double[] yDot, String paramName)	Compute the Jacobian matrix of ODE with respect to one parameter.
default List<String>	getParametersNames()	Get the names of the supported parameters.
default boolean	isSupported(String name)	Check if a parameter is supported.

Methods inherited from interface org.hipparchus.ode.OrdinaryDifferentialEquation

computeDerivatives, getDimension, init

Method Details

computeMainStateJacobian

double[][] computeMainStateJacobian(double t,
 double[] y,
 double[] yDot)
                             throws MathIllegalArgumentException,
MathIllegalStateException

Compute the Jacobian matrix of ODE with respect to state.

Parameters:

t - current value of the independent time variable

y - array containing the current value of the main state vector

yDot - array containing the current value of the time derivative of the main state vector

Returns:

Jacobian matrix of the ODE w.r.t. the main state vector

Throws:

MathIllegalStateException - if the number of functions evaluations is exceeded

MathIllegalArgumentException - if arrays dimensions do not match equations settings

getParametersNames

default List<String> getParametersNames()

Get the names of the supported parameters.

The default implementation has no parameters at all.

Specified by:

getParametersNames in interface Parameterizable

Returns:

parameters names

See Also:

• Parameterizable.isSupported(String)

isSupported

default boolean isSupported(String name)

Check if a parameter is supported.

Supported parameters are those listed by Parameterizable.getParametersNames().

The default implementation supports no parameters at all.

Specified by:

isSupported in interface Parameterizable

Parameters:

name - parameter name to check

Returns:

true if the parameter is supported

See Also:

• Parameterizable.getParametersNames()

computeParameterJacobian

default double[] computeParameterJacobian(double t,
 double[] y,
 double[] yDot,
 String paramName)
                                   throws MathIllegalArgumentException

Compute the Jacobian matrix of ODE with respect to one parameter.

If the parameter does not belong to the collection returned by Parameterizable.getParametersNames(), the Jacobian will be set to 0, but no errors will be triggered.

The default implementation supports no parameters at all.

Specified by:

computeParameterJacobian in interface NamedParameterJacobianProvider

Parameters:

t - current value of the independent time variable

y - array containing the current value of the main state vector

yDot - array containing the current value of the time derivative of the main state vector

paramName - name of the parameter to consider

Returns:

Jacobian matrix of the ODE with respect to the parameter

Throws:

MathIllegalArgumentException - if arrays dimensions do not match equations settings