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