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

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

All Implemented Interfaces:

DifferentiableUnivariateRealFunction, UnivariateRealFunction

public class Atan
extends java.lang.Object
implements DifferentiableUnivariateRealFunction

Arc-tangent function.

Since:

3.0

Version:

$Id$

Constructor Summary

Atan()

Method Summary

UnivariateRealFunction	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

Atan

public Atan()

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 UnivariateRealFunction derivative()

Returns the derivative of the function

Specified by:

derivative in interface DifferentiableUnivariateRealFunction

Returns:

the derivative function