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On Fri, August 5, 2005 3:27 pm, Derek Raycraft wrote:
> Steve Hassenplug wrote:
> > I think there are several readings that can give you more than one result. For
> > example, if you take two readings of 90 and 270, what should the answer be? 0?
> > 180?
> >
> > never mind. I like Derek's answer.
>
>
> One of the things I did pickup from "my" answer is you need to have a
> sample frequency small enough that you are not going to get wind
> direction changes of 180 degrees or more. And I say or more, because
> it's important to the average which direction you went to get from one
> reading to the next reading.
I noticed that, also. I think it says "changes must be less than 180". However,
I'm not sure it matters which direction you went. For example, if you get readings
of 10 deg and 20 deg, but in the time between the direction was never 15 degrees,
the average would be the same.
If it DOES matter, the number of samples should be increased.
This is much more interesting than real work on Friday afternoon...
Steve
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Message is in Reply To:
 | | Re: OT: Math Help
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| (...) One of the things I did pickup from "my" answer is you need to have a sample frequency small enough that you are not going to get wind direction changes of 180 degrees or more. And I say or more, because it's important to the average which (...) (19 years ago, 5-Aug-05, to lugnet.org.ca.rtltoronto)
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