matlab画圆

代码

[m,n,k]=sphere(30);
k(k<0)=nan;
surf(9*m,9*n,9*k)%画圆
alpha(.2)%透明度
shading interp %阴影
hold on 
%画线
for i = 1:7
    o(i) = 9* cos(22*pi/180)*cos(360/6*i*pi/180);
    p(i) = 9*cos(22*pi/180)*sin(360/6*i*pi/180);
    q(i) = 9*sin(22*pi/180);
end
%三维画图
plot3(o,p,q);