The N-Point Moving Average (MA) Filter

- Write a Matlab code to load the input signal x[n],

clc
clear all
close all

N = input('Enter Order of Filter: ');
n = 0:N-1;

for k=n
y(k)=(1/N)*(sum(x(k:-1:k-N+1)))
end

plot(y(n))

I have such a solution for step 1, but I get an error. 'Unrecognized function or variable' x '.'

clc
clear all
close all

N = input('Enter Order of Filter: ');
n = 0:N-1;
x = 5;
for k=n
y(k)=(1/N)*(sum(x(k:-1:k-N+1)))
end

plot(y(n))

I get this error when I enter any value for X. 'Array indices must be positive integers or logical values.' How can I fix this problem?

- Then the reduce the noise of this signal using the given MA filter.

I do not know how to reduce the noise, I could not find a useful resource.

- Finally plot the original signal and the filtered one in the same figure.