wolffd@0: function y = rosen(x)
wolffd@0: %ROSEN	Calculate Rosenbrock's function.
wolffd@0: %
wolffd@0: %	Description
wolffd@0: %	Y = ROSEN(X) computes the value of Rosenbrock's function at each row
wolffd@0: %	of X, which should have two columns.
wolffd@0: %
wolffd@0: %	See also
wolffd@0: %	DEMOPT1, ROSEGRAD
wolffd@0: %
wolffd@0: 
wolffd@0: %	Copyright (c) Ian T Nabney (1996-2001)
wolffd@0: 
wolffd@0: % Calculate value of Rosenbrock's function: x should be nrows by 2 columns
wolffd@0: 
wolffd@0: y = 100 * ((x(:,2) - x(:,1).^2).^2) + (1.0 - x(:,1)).^2;