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

java.lang.Object
  extended by org.apache.commons.math3.analysis.function.Identity
All Implemented Interfaces:
DifferentiableUnivariateFunction, UnivariateFunction

public class Identity
extends Object
implements DifferentiableUnivariateFunction

Identity function.

Since:
3.0
Version:
$Id$

Constructor Summary
Identity()
           
 
Method Summary
 DifferentiableUnivariateFunction 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 UnivariateFunction
Parameters:
x - Point at which the function value should be computed.
Returns:
the value of the function.

derivative

public DifferentiableUnivariateFunction derivative()
Returns the derivative of the function

Specified by:
derivative in interface DifferentiableUnivariateFunction
Returns:
the derivative function


Copyright (c) 2003-2013 Apache Software Foundation