Hello I am having trouble plotting this convolution. my error is "Vectors must be the same length."

if true
  % code
end
n= -60:60;
xn= cos(n/10);
h = zeros(size(n));
h(abs(n)<=10) = 1/21;
xn1= conv(xn,h);
plot(n,xn1);

[George]

Are you sure n is defined correctly? It looks like you're trying to make an array, but you're making a scalar.

[robert Griffin]

its suppose to be -60 to 60. and I have cov instead of conv, though it is still not working.

[robert Griffin]

here is the question. 5. Calculate

Answer 1

[Thorsten]

Use conv for convolution. cov computes the covariance matrix.

[robert Griffin]

Thank you, that helped majorly. Though I get a graph of nothing.

[Thorsten]

Just use

xn1= conv(xn,h, 'same');

and everything's alright.