Matlab code for Signal smoothing by moving- average Filter

Code:

clc

clear all;

w=input('Enter window size:');

fs=input('Enter sampling freq:');

f=input('Enter freq:');

t=0:1/fs:1;

x=sin(2*pi*f*t);

e=0.5*randn(1,fs+1);

xe=x+e;

for n=1:fs-w

    xblk=xe(1,n:n+w-1);

    y(n)=(1/w)*sum(xblk);

end

subplot 211; plot(xe);title('Noisy signal');grid on;

subplot 212; plot(y);title('filtered signal');grid on;

Output:

Enter window size: 200

Enter sampling freq: 10000

Enter freq: 10