gusucode.com > 《精通matlab 7》包括配套光盘 > 配套光盘里的程序附件/Ex-24/Ex2411.m

    %例24-11 三维向量场图
%Ex24-11 quiver3
clear
close all
[X,Y]=meshgrid(-3:0.4:3);
Z=-3*X.^2-Y.^2;
[U,V,W]=surfnorm(X,Y,Z);
quiver3(X,Y,Z,U,V,W,0.2)
hold on
surf(X,Y,Z)