Let x(n) = {2, 4,−3,1↑
,−5, 4, 7}. Generate and plot the samples (use the stem function) of the following
sequences.
1. x1 (n) = 2x(n − 3) + 3x(n + 4) − x(n)
% P0204a: x(n) = [2,4,-3,1,-5,4,7]; -3 <=n <= 3;
% x1(n) = 2x(n - 3) + 3x(n + 4) - x(n)
clc; close all;
n = [-3:3]; x = [2,4,-3,1,-5,4,7];
[x11,n11] = sigshift(x,n,3); % shift by 3
[x12,n12] = sigshift(x,n,-4); % shift by -4
[x13,n13] = sigadd(2*x11,n11,3*x12,n12); % add two sequences
[x1,n1] = sigadd(x13,n13,-x,n); % add two sequences
Hf_1 = figure; set(Hf_1,’NumberTitle’,’off’,’Name’,’P0204a’);
Hs = stem(n1,x1,’filled’); set(Hs,’markersize’,2);
axis([min(n1)-1,max(n1)+1,min(x1)-3,max(x1)+1]);
xlabel(’n’,’FontSize’,LFS);
ylabel(’x_1(n)’,’FontSize’,LFS);
title(’Sequence x_1(n)’,’FontSize’,TFS); ntick = n1;
ytick = [min(x1)-3:5:max(x1)+1];
set(gca,’XTickMode’,’manual’,’XTick’,ntick);
set(gca,’YTickMode’,’manual’,’YTick’,ytick);
print -deps2 ../CHAP2_EPSFILES/P0204a;

이게 솔루션에 나와있던데 이거다넣고 돌려야 그래프나옴?