Method Detail

• val

  double val(double[] x,
             double[] a)

  Evaluate this function at point x. The function is otherwise defined over an array of parameters a, that is the target of the fitting procedure.

  Parameters:

  x - the multidimensional to evaluate the fonction at

  a - the set of parameters that defines the function

  Returns:

  a double value, the function evaluated at x

• grad

  double grad(double[] x,
              double[] a,
              int ak)

  Evaluate the gradient value of the function, taken with respect to the ak^th parameter, evaluated at point x.

  Parameters:

  x - the point to evaluate the gradient at

  a - the set of parameters that defines the function

  ak - the index of the parameter to compute the gradient

  Returns:

  the kth component of the gradient df(x,a)/da_k

  See Also:

  val(double[], double[])