ms3_3.m

《数字信号处理实验(MATLAB版)》这

n1=0;n2=10;n01=2;n02=4;
n=n1:n2;
x1=[(n-n01)==0];
x2=[(n-n02)==0];
x3=x1+x2;
subplot(3,1,1);stem(n,x1,'filled','k');
axis([n1,n2,1.1*min(x1),1.1*max(x1)]);
ylabel('δ(n-2)');
subplot(3,1,2);stem(n,x2,'filled','k');
axis([n1,n2,1.1*min(x2),1.1*max(x2)]);
ylabel('δ(n-4)');
subplot(3,1,3);stem(n,x3,'filled','k');
axis([n1,n2,1.1*min(x3),1.1*max(x3)]);
ylabel('δ(n-2)+δ(n-4)');