update

% 2.10(b) -------------------------------

% This is not a problem that require to be verified by MATLAB

A = [1 zeros(1, 999) 0.5];

B = [1];

z = filter(B, A, y);

figure;

stem(conv(z,he),'*');

hold on;

stem(y,'p--g')

title('y[n] & z[n]*he[n]');

xlabel('n');

saveas(gcf, "plots/P2_10_b_out.png");

close;

% 2.10(c) -------------------------------

a = [1 zeros(1, 999) 0.5];

b = [1];