x = repmat(linspace(-1,1),[100,1]);
y = x';
r = x.^2+y.^2;
z = exp(-r*3).*cos(5*pi*r);
surf(x,y,z);
axis equal
view(3)
surf(x,y,z);
axis equal
view(2)
surf(x,y,z);
axis equal
view(25,50)