one.asv

matlab的一些基础程序

%a) x(n)=2*delta(n+2) - delta(n-4), -5<=n<5
clc
clear
l1=figure;
n=[-5 : 5];
x=2*impseq(-2,-5,5) - impseq(4,-5 ,5);
 stem(n,x);title('Sequence in Example 3.1a')
xlabel('n'); ylabel('x(n)');axis([-5,5,-2,3])