optimization/test_functions/rosenbrock.m

   1 function f = rosenbrock(x1, x2)
   2   %
   3   % The Rosenbrock function. See Dennis & Schnabel, Appendix B, problem #1.
   4   % (The "regular" Rosenbrock function is simply the Extended Rosenbrock
   5   % with m=1).
   6   %
   7   % This function has a minimum at x=(1,1) with f(x) == 0. The
   8   % suggested starting point is x0=(-1.2, 1).
   9   %
  10   f = 100*(x2 - x1^2)^2 + (1 - x1)^2;
  11 end