[Date Index] [Thread Index] [Author Index]

Re: Find the center!

• To: mathgroup at christensen.cybernetics.net
• Subject: [mg1127] Re: Find the center!
• From: wagner at bullwinkle.cs.Colorado.EDU (Dave Wagner)
• Date: Wed, 17 May 1995 01:59:11 -0400
• Organization: University of Colorado, Boulder

In article <3p1dtm$n2n at news0.cybernetics.net>,
Gottfried Mayer-Kress  <gmk at pegasos.ccsr.uiuc.edu> wrote:
>
>There are a bunch of points in 3-space and they are supposed to be 
>scattered around the surface of a sphere. You want to find the
>center of the sphere and the radius.
>
>NB: The data are noisy (about 2% of the radius) and only cover a patch 
>on the sphere.
>
>I think I have a reasonable solution, but maybe someone knows of some 
>real elegant method?

There were several approaches to this problem in The Mathematica Journal
a couple of years ago, in several different issues.  They probably were
in Paul Abbott's "Tricks of the Trade" column.

		Dave Wagner
		Principia Consulting
		(303) 786-8371
		dbwagner at princon.com
		http://www.princon.com/princon