Package com.irurueta.numerical.integration

Class TrapezoidalQuadrature

java.lang.Object

com.irurueta.numerical.integration.Quadrature

com.irurueta.numerical.integration.TrapezoidalQuadrature

public class TrapezoidalQuadrature
extends Quadrature

Implementation of quadrature using trapezoidal algorithm. This implementation is suitable for non-improper integrands, which consist of functions with not known singularities that can be evaluated on all the integration interval, which must be finite.

Field Summary

Fields

Modifier and Type	Field	Description
private final double	a	Lower limit of integration.
private final double	b	Upper limit of integration.
private final SingleDimensionFunctionEvaluatorListener	listener	Listener to evaluate single dimension functions at required points.
private double	s	Current value of integral.

Fields inherited from class com.irurueta.numerical.integration.Quadrature

n

Constructor Summary

Constructors

Constructor	Description
TrapezoidalQuadrature(double a, double b, SingleDimensionFunctionEvaluatorListener listener)	Constructor.

Method Summary

Modifier and Type	Method	Description
double	getA()	Gets lower limit of integration.
double	getB()	Gets upper limit of integration.
double	getS()	Gets current value of integral.
QuadratureType	getType()	Gets type of quadrature.
double	next()	Returns the value of the integral at the nth stage of refinement.

Methods inherited from class com.irurueta.numerical.integration.Quadrature

getN

Methods inherited from class java.lang.Object

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

Field Details

a

private final double a

Lower limit of integration.

b

private final double b

Upper limit of integration.

s

private double s

Current value of integral.

listener

private final SingleDimensionFunctionEvaluatorListener listener

Listener to evaluate single dimension functions at required points.

Constructor Details

TrapezoidalQuadrature

public TrapezoidalQuadrature(double a,
 double b,
 SingleDimensionFunctionEvaluatorListener listener)

Constructor.

Parameters:

a - Lower limit of integration.

b - Upper limit of integration.

listener - listener to evaluate a single dimension function at required points.

Method Details

getA

public double getA()

Gets lower limit of integration.

Returns:

lower limit of integration.

getB

public double getB()

Gets upper limit of integration.

Returns:

upper limit of integration.

getS

public double getS()

Gets current value of integral.

Returns:

current value of integral.

next

public double next()
            throws EvaluationException

Returns the value of the integral at the nth stage of refinement.

Specified by:

next in class Quadrature

Returns:

the value of the integral at the nth stage of refinement.

Throws:

EvaluationException - Raised if something failed during the evaluation.

getType

public QuadratureType getType()

Gets type of quadrature.

Specified by:

getType in class Quadrature

Returns:

type of quadrature.