szsxl.m

the code of the book come form the book of marlix laboratory with the book of singal

function szsxl(a,n1,n2)
%a：实指数序列的底数
%n1：绘制序列的起始时间序号
%n2：绘制序列的终止时间序号
n=n1:n2;
x=a.^n;
stem(n,x,'filled')
title('a^n')
xlabel('n')
set(gcf,'color','w')