com.numericalmethod.suanshu.analysis.differentiation.univariate
Class DErf

java.lang.Object
  com.numericalmethod.suanshu.analysis.function.rn2r1.UnivariateRealFunction
      com.numericalmethod.suanshu.analysis.differentiation.univariate.DErf

All Implemented Interfaces:

Function, RealScalarFunction

public class DErf
extends UnivariateRealFunction

This class represents the first order derivative function of the Error function,

 d(Erf)    2
 ------ = --- exp(-x2)
 dx       √π
 

See Also:

Erf

Nested Class Summary

Nested classes/interfaces inherited from interface com.numericalmethod.suanshu.analysis.function.Function

Function.EvaluationException

Constructor Summary

DErf()

Method Summary

double

evaluate(double x) Evaluate the derivative of the Error function.

Methods inherited from class com.numericalmethod.suanshu.analysis.function.rn2r1.UnivariateRealFunction

dimension4Domain, dimension4Range, evaluate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DErf

public DErf()

Method Detail

evaluate

public double evaluate(double x)

Evaluate the derivative of the Error function.

Specified by:

evaluate in class UnivariateRealFunction

Parameters:

x - x

Returns:

the derivative of the Error function