clear all
t=linspace(0,1,37);
[r,p]=meshgrid(t,t*2*pi);
mesh(r.*cos(p),r.*sin(p),r.^2)
hold on
mesh(cos(pi*r).*cos(p),cos(pi*r).*sin(p),1+sin(pi*r))
axis equal
clear all
t=linspace(0,1,37);
[r,p]=meshgrid(t,t*2*pi);
mesh(r.*cos(p),r.*sin(p),r.^2)
hold on
mesh(cos(pi*r).*cos(p),cos(pi*r).*sin(p),1+sin(pi*r))
axis equal
