Think about what you are trying to get: The Root of the Mean of
all the Squares -> Root Mean Square -> RMS by definition!



On Mon, 6 Mar 2000, Lorick wrote:

> Weeks ago I was looking at ways to determine the RMS value of a sampled
> waveform with the 16F876 and several suggestions were to take 256
> measurements (for easy division later) and accumulate the sum of squares,
> divide by number of samples, and square root to get the RMS value of the
> readings.
>
> Now I would like to know why this works....what is the mathematical
> relationship between squaring the readings and obtaining the RMS in the end?
>
> I know it's almost stupid to ask since we're talking about Root Mean Square
> to begin with....but I  am indeed missing the in between steps in the
> story...
>


Jeffrey D. Spears
University of Michigan
College of Engineering

``Double-E, can't spell gEEk without it!''
                        -Captain Gerald M. Bloomfield II, USMC
                         (my brother)