ms23_3.m

《数字信号处理实验(MATLAB版)》这

h=[3,-1,-5,4,0,-4,5,1,-3];
M=length(h);n=0:M-1;
[A,w,type,tao]=amplres(h);type
subplot(2,1,1),stem(n,h,'k');
ylabel('h(n)');xlabel('n');
subplot(2,1,2),plot(w/pi,A,'k');
ylabel('A');xlabel('\pi');