
j=0.1;   
u=1:j:5;
v=0:j:2*pi+j;

[uu,vv]=meshgrid(u,v);

figure(1);


xx=uu.*cos(vv);
yy=uu.*sin(vv);
zz=0.*uu;

mesh(xx,yy,0*zz);
axis([-5,5,-5,5]);
view(2);