Re: Weighted Standard Deviational Ellipse formula?
From: Ray Koopman (koopman_at_sfu.ca)
Date: 02/28/05
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Date: 28 Feb 2005 14:52:55 -0800
Mark V. wrote:
> Hello,
>
> Does anyone know of the formula for calculating a Standard
Deviational
> Ellipse based on the weights of points in a polygon? I can't seem to
> find anything on the Internet, and the textbook formulae I've seen
> provide a formula that assumes that all points are weighted equally.
>
> Thanks.
I think the answer may depend on how you got the points and what the
weights represent. Are the points fixed, with the weights being the
data values at those points; or are the points random, with their
locations being the data, and the weights carrying some sort of
importance or frequency information?
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