Package org.hipparchus.analysis.integration

Class SimpsonIntegrator

java.lang.Object

org.hipparchus.analysis.integration.BaseAbstractUnivariateIntegrator

org.hipparchus.analysis.integration.SimpsonIntegrator

All Implemented Interfaces:

UnivariateIntegrator

public class SimpsonIntegrator
extends BaseAbstractUnivariateIntegrator

Implements Simpson's Rule for integration of real univariate functions. For reference, see Introduction to Numerical Analysis, ISBN 038795452X, chapter 3.

This implementation employs the basic trapezoid rule to calculate Simpson's rule.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	SIMPSON_MAX_ITERATIONS_COUNT	Maximal number of iterations for Simpson.

Fields inherited from class org.hipparchus.analysis.integration.BaseAbstractUnivariateIntegrator

DEFAULT_ABSOLUTE_ACCURACY, DEFAULT_MAX_ITERATIONS_COUNT, DEFAULT_MIN_ITERATIONS_COUNT, DEFAULT_RELATIVE_ACCURACY, iterations

Constructor Summary

Constructors

Constructor	Description
SimpsonIntegrator()	Construct an integrator with default settings.
SimpsonIntegrator(double relativeAccuracy, double absoluteAccuracy, int minimalIterationCount, int maximalIterationCount)	Build a Simpson integrator with given accuracies and iterations counts.
SimpsonIntegrator(int minimalIterationCount, int maximalIterationCount)	Build a Simpson integrator with given iteration counts.

Method Summary

Modifier and Type	Method	Description
protected double	doIntegrate()	Method for implementing actual integration algorithms in derived classes.

Methods inherited from class org.hipparchus.analysis.integration.BaseAbstractUnivariateIntegrator

computeObjectiveValue, getAbsoluteAccuracy, getEvaluations, getIterations, getMax, getMaximalIterationCount, getMin, getMinimalIterationCount, getRelativeAccuracy, integrate, setup

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

SIMPSON_MAX_ITERATIONS_COUNT

public static final int SIMPSON_MAX_ITERATIONS_COUNT

Maximal number of iterations for Simpson.

See Also:

• Constant Field Values

Constructor Details

SimpsonIntegrator

public SimpsonIntegrator(double relativeAccuracy,
 double absoluteAccuracy,
 int minimalIterationCount,
 int maximalIterationCount)
                  throws MathIllegalArgumentException

Build a Simpson integrator with given accuracies and iterations counts.

Parameters:

relativeAccuracy - relative accuracy of the result

absoluteAccuracy - absolute accuracy of the result

minimalIterationCount - minimum number of iterations

maximalIterationCount - maximum number of iterations (must be less than or equal to SIMPSON_MAX_ITERATIONS_COUNT)

Throws:

MathIllegalArgumentException - if minimal number of iterations is not strictly positive

MathIllegalArgumentException - if maximal number of iterations is lesser than or equal to the minimal number of iterations

MathIllegalArgumentException - if maximal number of iterations is greater than SIMPSON_MAX_ITERATIONS_COUNT

SimpsonIntegrator

public SimpsonIntegrator(int minimalIterationCount,
 int maximalIterationCount)
                  throws MathIllegalArgumentException

Build a Simpson integrator with given iteration counts.

Parameters:

minimalIterationCount - minimum number of iterations

maximalIterationCount - maximum number of iterations (must be less than or equal to SIMPSON_MAX_ITERATIONS_COUNT)

Throws:

MathIllegalArgumentException - if minimal number of iterations is not strictly positive

MathIllegalArgumentException - if maximal number of iterations is lesser than or equal to the minimal number of iterations

MathIllegalArgumentException - if maximal number of iterations is greater than SIMPSON_MAX_ITERATIONS_COUNT

SimpsonIntegrator

public SimpsonIntegrator()

Construct an integrator with default settings. (max iteration count set to SIMPSON_MAX_ITERATIONS_COUNT)

Method Details

doIntegrate

protected double doIntegrate()
                      throws MathIllegalStateException

Method for implementing actual integration algorithms in derived classes.

Specified by:

doIntegrate in class BaseAbstractUnivariateIntegrator

Returns:

the root.

Throws:

MathIllegalStateException - if the maximal number of evaluations is exceeded.