view — Change viewpoint property for 3d graphs
Typing view(V) after a 3d plot allows to set the viewpoint at infinity
in spherical coordinates : in this case V is a 2-vector 'view', [az;al]
in cartesian coordinates : in this case V is a 3-vector 'view', [x;y;z]
V can also take the value "2" or "3" to switch between 2d view and default 3d view.