The Styblinski-Tang function, defined by. More...

Public Member Functions
	StyblinskiTangFunction (const size_t n)

double	Evaluate (const arma::mat &coordinates, const size_t begin, const size_t batchSize) const

double	Evaluate (const arma::mat &coordinates) const

arma::mat	GetInitialPoint () const
	Get the starting point. More...

void	Gradient (const arma::mat &coordinates, const size_t begin, arma::mat &gradient, const size_t batchSize) const

void	Gradient (const arma::mat &coordinates, arma::mat &gradient)

size_t	NumFunctions () const
	Return 1 (the number of functions). More...

void	Shuffle ()
	Shuffle the order of function visitation. More...

Detailed Description

The Styblinski-Tang function, defined by.

$f(x) = 0.5 * \sum_{i=1}^{d} x_i^4 - 16_i^2+5x_i$

This should optimize to f(x) = -39.16599 * d at x = [-2.903534, ..., -2.903534].

For more information, please refer to:

* @article{Jamil2013,
*   title   = {A Literature Survey of Benchmark Functions For Global
*              Optimization Problems},
*   author  = {Momin Jamil and Xin{-}She Yang},
*   journal = {CoRR},
*   year    = {2013},
*   url     = {http://arxiv.org/abs/1308.4008}
* }
* 

Definition at line 44 of file styblinski_tang_function.hpp.