title: Applying derivative operation on Signal in Matlab
body: <p>I've been given the formula below to apply to a signal. I'm not sure how to plug this into Matlab, can anyone explain?</p>
  
  <p>y(n) =1/8[2x(n) + x(n − 1) − x(n − 3) − 2x(n − 4)]</p>