function cone_plot(m,x0,y0,z0) % (x0,y0,z0)---顶点坐标 % m---底圆在y轴的坐标位置. x1=linspace(-5,-eps,100); x2=linspace(eps,5,100); x=[x1,x2]; z1=sqrt(25-x.^2); z2=-sqrt(25-x.^2); x0=x0*ones(1,length(z1)); y0=y0*ones(1,length(z1)); z0=z0*ones(1,length(z1)); y=m*ones(1,length(z1)); for i=1:length(z1) line([x0(i),x(i)],[y0(i),y(i)],[z0(i),z1(i)]) hold on line([x0(i),x(i)],[y0(i),y(i)],[z0(i),z2(i)]) end grid on (责任编辑:泉水) |