>> Is there a way to do an n sample moving average without storing n samples?
>> I want to do a 20 sample moving average.  Do I need to set aside 20 locations/variables for this task?
>> Is there a slicker way?

>>Robert Mash

  >    If you are willing to implement an exponential filter (exactly analogous to an RC hardware filter),
  >    you can do much better. From Z transform theory, a one stage recursive filter can be modelled
  >    as
  >    y(n) = x(n) + alpha * y(n-1)

   I think I made a mistake in the normalization of this formula. It should be
        y(n) = (1 - alpha) * x(n) + alpha * y(n-1)

  John Power

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