surfa.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

% surfa
clear,close all;
a=-1:0.1:8;
b=-20:0.1:20;
[a,b]=meshgrid(a,b);
c=a+b*i;
X=(1-exp(-(c+eps)))./(c+eps);
X=abs(X);
mesh(a,b,X);
%mesh(X);