plot3d.m

经典《信号与系统》教程的matlab例程,对深入理解信号与系统相关概念有很大帮助

clear,close all;
x=-18:0.5:18;
y=x;
[x,y]=meshgrid(x,y);
R=sqrt(x.^2+y.^2)+eps;
Z=sin(R)./R;
mesh(x,y,Z),grid on
%axis([0,20,-20,20,-0.5,1])