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MathGroup Archive 1995

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3D Cluster Detection

  • To: mathgroup at smc.vnet.net
  • Subject: [mg2413] 3D Cluster Detection
  • From: Fergal Shevlin <fshevlin at maths.tcd.ie>
  • Date: Sun, 5 Nov 1995 16:04:45 -0500
  • Organization: Dept. of Maths, Trinity College, Dublin, Ireland.

Hello,

I have a list of Real 3D points, each coordinate having a value
between 0 and 2 Pi. Within this list there are several 
"clusters" of points, i.e. the coordinates agree to several
decimal places. Each cluster is quite distinct from the other,
for example when I view the points with
ScatterPlot3D[pointlist]
I see 4 points, despite the fact that there are hundreds in
the list.

Can anybody suggest a means of automatically detecting the
means or modes of these clusters? 

Thanks in advance,
Fergal.
-- 
====================================================================
Fergal Shevlin                    Phone: +353-1-6081209 Fax: 6772204 
Dept. of Computer Science                      http://www.cs.tcd.ie/
Trinity College, Dublin 2, Ireland.         Fergal.Shevlin at cs.tcd.ie


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