t=0:pi/20:2*pi;x=sin(t)+1;y=cos(t);z=linspace(-4,4,length(t));X=meshgrid(x);Y=meshgrid(y);Z=[meshgrid(z)]';mesh(X,Y,Z)%第一个圆柱面xlabel('x')ylabel('y')zlabel('z')axis&nbs...本来是x-1=sint,移项得x=sint+1