e22.m

来自「matlab例子」· M 代码 · 共 25 行

n=-2:10;
x=[1:7,6:-1:1];
[x11,n11]=sigshift(x,n,5);
[x12,n12]=sigshift(x,n,-4);
[x1,n1]=sigadd(2*x11,n11,-3*x12,n12);
subplot(2,1,1);
stem(n1,x1);
title('例2.2a的序列');
xlabel('n');
ylabel('x1(n)');
grid;
%------------------
[x21,n21]=sigfold(x,n);
[x21,n21]=sigshift(x21,n21,3);
[x22,n22]=sigshift(x,n,2);
[x22,n22]=sigmult(x,n,x22,n22);
[x2,n2]=sigadd(x21,n21,x22,n22);
subplot(2,1,2);
stem(n2,x2);
title('例2.2b的序列');
xlabel('n');
ylabel('x2(n)');

grid;