Constructor Detail

• Logistic.Parametric

  public Logistic.Parametric()

Method Detail

• value

  public double value(double x,
             double... param)
               throws NullArgumentException,
                      DimensionMismatchException,
                      NotStrictlyPositiveException

  Computes the value of the sigmoid at x.

  Specified by:

  value in interface ParametricUnivariateFunction

  Parameters:

  x - Value for which the function must be computed.

  param - Values for k, m, b, q, a and n.

  Returns:

  the value of the function.

  Throws:

  NullArgumentException - if param is null.

  DimensionMismatchException - if the size of param is not 6.

  NotStrictlyPositiveException - if param[5] <= 0.

• gradient

  public double[] gradient(double x,
                  double... param)
                    throws NullArgumentException,
                           DimensionMismatchException,
                           NotStrictlyPositiveException

  Computes the value of the gradient at x. The components of the gradient vector are the partial derivatives of the function with respect to each of the parameters.

  Specified by:

  gradient in interface ParametricUnivariateFunction

  Parameters:

  x - Value at which the gradient must be computed.

  param - Values for k, m, b, q, a and n.

  Returns:

  the gradient vector at x.

  Throws:

  NullArgumentException - if param is null.

  DimensionMismatchException - if the size of param is not 6.

  NotStrictlyPositiveException - if param[5] <= 0.