ms2_5.m

《数字信号处理实验(MATLAB版)》这

n1=-10;n2=10;a1=0.5;a2=2;                  
na1=n1:0; x1=a1.^na1;
na2=0:n2;x2=a2.^na2;
subplot(2,2,1),plot(na1,x1,'k');
title('实指数原信号(a<1)');
subplot(2,2,3),stem(na1,x1,'filled','k');
title('实指数序列(a<1)');
subplot(2,2,2),plot(na2,x2,'k');
title('实指数原信号(a>1)');
subplot(2,2,4),stem(na2,x2,'filled','k');
title('实指数序列(a>1)');