org.apache.commons.math4.analysis.function

## Class Sinc

• All Implemented Interfaces:
UnivariateDifferentiableFunction, UnivariateFunction

public class Sinc
extends Object
implements UnivariateDifferentiableFunction
Sinc function, defined by

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

Since:
3.0
• ### Constructor Summary

Constructors
Constructor and Description
Sinc()
The sinc function, sin(x) / x.
Sinc(boolean normalized)
Instantiates the sinc function.
• ### Method Summary

All Methods
Modifier and Type Method and Description
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.
• #### value

public DerivativeStructure value(DerivativeStructure t)
throws DimensionMismatchException
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
Throws:
DimensionMismatchException - if t is inconsistent with the function's free parameters or order
Since:
3.1