Moving Average Filter in MATLAB | DSP

Prerequisite:
Random sequence Generation in MATLAB | Part 1

Code:

clc

clear all

close all

t=0:0.11:20;

x=sin(t);

n=randn(1,length(t));

x=x+n;

a=input('Enter the no.:');

t2=ones(1,a);

num=(1/a)*t2;

den=[1];

y=filter(num,den,x);

plot(x,'b');

hold on;

plot(y,'r','linewidth',2);

legend('Noisy signal','Filtered signal');