org.apache.commons.math.analysis.function
Class Identity

java.lang.Object
  org.apache.commons.math.analysis.function.Identity

All Implemented Interfaces:

DifferentiableUnivariateRealFunction, UnivariateRealFunction

public class Identity
extends java.lang.Object
implements DifferentiableUnivariateRealFunction

Identity function.

Since:

3.0

Version:

$Id$

Constructor Summary

Identity()

Method Summary

DifferentiableUnivariateRealFunction	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

Identity

public Identity()

Method Detail

value

public double value(double x)

Compute the value of the function.

Specified by:

value in interface UnivariateRealFunction

Parameters:

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

Returns:

the value of the function.

derivative

public DifferentiableUnivariateRealFunction derivative()

Returns the derivative of the function

Specified by:

derivative in interface DifferentiableUnivariateRealFunction

Returns:

the derivative function