Hi,

maybe I'm missing something but I am not surprised reading the result
here, because of south is ambiguous in that way there is no natural value
for it. One must arbitrarly assign either -180 or 180 to it, but it is a
DECISION and math does not know nothing about decisions, at least in this
case. It is like a function with a non-contiguous point.

Imre

On Thu, 16 Sep 2004, Mike Hord wrote:

> But the math result of 170 and -170 would be zero, since -170 + 170 = 0.
> If zero is north, and 170 and -170 are just east and west of south, the
> average of the two readings would be north, instead of south.
>
> I think in the end, one just has to figure out what the end result of the
> data has to be and tailor the system to fit.
>
> Remember, this sort of thing is why creative problem solvers with a good
> grip on the underlying concepts will have jobs for a good long time to come.
> So be grateful these problems exist!
>
> Mike H.
>
> > I don't understand that. Your encoding uses -180 ... + 180 for the full
> > circle, so 170 and -170 are pretty close, just 20 degrees apart, so
> > there is only one average (south, if 0 is north).
> >
> >
> >
> > Wouter van Ooijen
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