Question

如何在matlab中绘制球面x^2+y^2+z^2=16圆锥面x^2+y^2=z^2所围区域

与计算lim tan(xy)/y x趋向于2 y趋向于0

Answer 1

[x1,y1,z1]=sphere(400); xq=2*x1;yq=2*y1;zq=z1*2; mesh(xq,yq,zq) %画球 alpha(0.9); hold on [x,y,z]=cylinder(2,400); mesh(x,y,z),%画圆柱 alpha(0.2); colormap(jet) plot3(x(1,:),y(1,:),zeros(length(x(1,:))),'k.')%画交线 hold off 按上面语句试试