clc;
clear all;

x=ones(1,8);
windowSize = 5;
h=(1/windowSize)*ones(1,windowSize);
a=1;

y=filter(h,a,x);
figure;
stem(x, '--b');
hold on;
stem(y, '--r');
grid;
xlabel('n')
title('Signal x filtered through h')
legend( 'Signal x' ,'Filtered Signal y');

z=filter(h,a,y);
figure;
stem(x, '--b');
hold on;
stem(z, '--g');
grid;
xlabel('n')
title('Signal y filtered through h')
legend( 'Signal y' ,'Filtered Signal z');

w=filter(h,a,z);
figure;
stem(x, '--b');
hold on;
stem(w, '--k');
grid;
xlabel('n')
title('Signal z filtered through h')
legend( 'Signal z' ,'Filtered Signal w');