Class GaussianDerivativeFunction

  • All Implemented Interfaces:
    java.io.Serializable, UnivariateRealFunction

    public class GaussianDerivativeFunction
    extends java.lang.Object
    implements UnivariateRealFunction, java.io.Serializable
    The derivative of GaussianFunction. Specifically:

    f'(x) = (-b / (d^2)) * (x - c) * exp(-((x - c)^2) / (2*(d^2)))

    Notation key:

    • x^n: x raised to the power of n
    • exp(x): e^x
    Since:
    2.2
    Version:
    $Revision: 1037327 $ $Date: 2010-11-20 21:57:37 +0100 (sam. 20 nov. 2010) $
    See Also:
    Serialized Form
    • Constructor Summary

      Constructors 
      Constructor Description
      GaussianDerivativeFunction​(double[] parameters)
      Constructs an instance with the specified parameters.
      GaussianDerivativeFunction​(double b, double c, double d)
      Constructs an instance with the specified parameters.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      double value​(double x)
      Compute the value for the function.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • GaussianDerivativeFunction

        public GaussianDerivativeFunction​(double b,
                                          double c,
                                          double d)
        Constructs an instance with the specified parameters.
        Parameters:
        b - b parameter value
        c - c parameter value
        d - d parameter value
        Throws:
        java.lang.IllegalArgumentException - if d is 0
      • GaussianDerivativeFunction

        public GaussianDerivativeFunction​(double[] parameters)
        Constructs an instance with the specified parameters.
        Parameters:
        parameters - b, c, and d parameter values
        Throws:
        java.lang.IllegalArgumentException - if parameters is null, parameters length is not 3, or if parameters[2] is 0
    • Method Detail

      • value

        public double value​(double x)
        Compute the value for the function.
        Specified by:
        value in interface UnivariateRealFunction
        Parameters:
        x - the point for which the function value should be computed
        Returns:
        the value