Another algorithm question

Archiver

Are there any algorithms available to compute moving averages of sampled
data? Can this be done in RAM, or is Write/Read to the EEPROM required?

Thanks,

Rob
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Archiver

>Are there any algorithms available to compute moving averages of sampled
>data? Can this be done in RAM, or is Write/Read to the EEPROM required?

Hi Rob,
Depends. It is better to do it in RAM if the data rate it high,
because of the danger of wearing out the EEPROM from too much
activity. EEPROM is slow. On the other hand, the Stamp does not
have much RAM available. Maybe your moving average only requires a
short data set?

The algorithm itself is not much of a problem. Set up a circular
buffer with a pointer to the the location to put the newest entry,
which will replace the oldest entry. Init the whole array with the
first reading taken. Then at each step, subtract the oldest entry,
add in the new entry, and advance the pointer.

regards,
-- Tracy
electronically monitored ecosystems
http://www.emesys.com/BS2math5.htm <--- more examples of digital filtering