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> what difference does it make whether we add (or subtract) a "1" to the
> denominator? Is this somehow more elegant? I don't see it.
Geez, talking about making mountains out of molehills. :-) Try a "1 day"
average and you will see why the +1 is needed. As I said before, the
formula for the smoothing constant is just one that works out pretty
well to give a lag and smoothing similar to a simple average. If you
want to get technical, it's trying to make an IIR filter give similar
output to an FIR filter using the same input. Seems like a pretty
reasonable convention to me.
--
Dennis
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