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