Test Functions

                      for Unconstrained Global Optimization

Schwefel Function

r Number of variables: n variables.

r Definition:

 

 

r Search domain: −500 ≤ x_i ≤ 500, i = 1, 2, . . . , n.

r Number of local minima: several local minima.

r The global minima: x^* =  (1, …, 1), f(x^*) = 0.

r MATLAB Code: download schw.m

r Function graph: for n = 2.