org.apache.commons.math3.analysis.function

Class Sinc

java.lang.Object

org.apache.commons.math3.analysis.function.Sinc

All Implemented Interfaces:

DifferentiableUnivariateFunction, UnivariateFunction

public class Sinc
extends Object
implements DifferentiableUnivariateFunction

Sinc function, defined by

   sinc(x) = 1            if x = 0,
             sin(x) / x   otherwise.
 

Since:

3.0

Version:

$Id$

Constructor Summary

Constructors

Constructor and Description
Sinc() The sinc function, sin(x) / x.
Sinc(boolean normalized) Instantiates the sinc function.

Method Summary

Methods

Modifier and Type	Method and Description
UnivariateFunction	derivative() Returns the derivative of the function
double	value(double x) Compute the value of the function.

Methods inherited from class java.lang.Object

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

Constructor Detail

Sinc

public Sinc()

The sinc function, sin(x) / x.

Sinc

public Sinc(boolean normalized)

Instantiates the sinc function.

Parameters:

normalized - If true, the function is sin(πx) / πx, otherwise sin(x) / x.

Method Detail

value

public double value(double x)

Compute the value of the function.

Specified by:

value in interface UnivariateFunction

Parameters:

x - Point at which the function value should be computed.

Returns:

the value of the function.

derivative

public UnivariateFunction derivative()

Returns the derivative of the function

Specified by:

derivative in interface DifferentiableUnivariateFunction

Returns:

the derivative function