example2_16.m

This complete matlab for neural network

Figure(1);
z1 = [-2:0.125:2]';
x2 = [-1:0.125:3]';
[x1,x2]=meshgrid(x1',x2') ;
meshd = 100.*(x2-x1.*x1).^2 + (1-x1).^2; 
mesh(meshd) 
xlabel('x(1)');
ylabel('x(2)');
zlabel('f(x)');
figure(2)
conts = exp(3:20);
xlabel('x1'),ylabel('x2'),title('Minimization of the Banana function')
contour(xx,yy,meshd,conts,'k:')