> >> This sounds like a problem I faced a while back, averaging compass 
> >> headings.
> >> 90,89,91 averages to 90, no problem, but 359,0,1 averages 
> to 180 which is 
> >> dead wrong.
> 
> It's actually NOT "wrong" - it's just not the interpretation 
> that you wanted to place on the data :-)

It might not be wrong when the question is to average numbers, but the
question was to average a measurement that is cyclic (circular) in
nature, like a compass reading. There is no usefull interpretation of
'right' or 'wrong' without a question.  :)

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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