北理工信号与系统实验报告

（5） <1>

>> n=-3:3;

>> x=[0 1 2 3 3 3 3]; >> stem(n,x,'filled'); >> grid on >> xlabel('n'); >> title('x(n)');

<2>

>> n=-3:3;

>> x=[0 1 2 3 3 3 3]; >> n2=-n;

>> stem(n2,x,'filled'); >> grid on; >> xlabel('n'); >> title('x(-n)');

<3>

>> n=-3:3;

>> x=[0 1 2 3 3 3 3]; >> n3=n-2;

>> stem(n3,x,'filled');

<4>

>> n=-3:3;

>> x=[0 1 2 3 3 3 3]; >> n4=n+2;

>> stem(n4,x,'filled');