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

java.lang.Object
  org.apache.commons.math3.analysis.function.Sinc

All Implemented Interfaces:

DifferentiableUnivariateFunction, UnivariateDifferentiableFunction, UnivariateFunction

public class Sinc
extends Object
implements UnivariateDifferentiableFunction, DifferentiableUnivariateFunction

Sinc function, defined by

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

Since:

3.0

Version:

$Id: Sinc.java 7721 2013-02-14 14:07:13Z CardosoP $

Constructor Summary

Sinc()
The sinc function, sin(x) / x.

Sinc(boolean normalized)
Instantiates the sinc function.

Method Summary

UnivariateFunction	derivative() Deprecated. as of 3.1, replaced by value(DerivativeStructure)
DerivativeStructure	value(DerivativeStructure t) Simple mathematical 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

@Deprecated
public UnivariateFunction derivative()

Deprecated. as of 3.1, replaced by value(DerivativeStructure)

Returns the derivative of the function

Specified by:

derivative in interface DifferentiableUnivariateFunction

Returns:

the derivative function

value

public DerivativeStructure value(DerivativeStructure t)

Simple mathematical function.

UnivariateDifferentiableFunction classes compute both the value and the first derivative of the function.

Specified by:

value in interface UnivariateDifferentiableFunction

Parameters:

t - function input value

Returns:

function result

Since:

3.1