That just seems to move the problem point.
Take 178, 179, 181 and 182.
Becomes 178, 179, -179, -178, average is 0.
Or am I misunderstanding the algorithm?

Kerry


IVP wrote:
>> are 0, 1, 359.  Then a simple average is 120, but the number I'm
>> looking for is zero
>>    =20
>
> You'll have to treat a range as negative. Look at the circle as left
> and right semi-circles
>
> For example, if the values were all between 0 and 180 then the
> result will be "positive", ie the average will be Eastward. If one is
> over 180 then that is going to skew the average Westward. And
> similarly if all the values but one were between 180 and 360
>
> Consider the way values are handled in a micro. 127 is the most
> positive, 128 is the most negative. For values that represent degrees,
> 0 is the least positive, 179 is the most positive, 180 is the most
> negative, 359 is the least negative. In this case wrt North, or 0
> degrees, which is where the circle starts and ends
>
> So, 0, 1, 359 becomes 0, 1 and -1. The -1 is derived from 359
> by (360 - value) if (value > 179) and designating it negative
>
> Example ; 0, 137, 245 becomes 0, 137, -115, and the average
> is +22, which is East of North
>
> Joe
>  =20

--=20
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