How to decide the number of true clusters using kth nearest neighbor clustering?

partha1 — Fri, 19 Feb 2016 09:58:41 GMT

I used proc modeclus code with m=1 and k=2 to 10 by1 that is with different values of k but I could not decide which solution was the best.

Re: How to decide the number of true clusters using kth nearest neighbor clustering?

sbxkoenk — Fri, 19 Feb 2016 17:41:06 GMT

Hello,

PROC MODECLUS has a (approximate) nonparametric test for the number of clusters.

Read this:

SAS/STAT 14.1 User's Guide

Read also:
Introduction to Clustering Procedures

The last few paragraphs of the latter page deal with nonparametric clustering (and more in particular PROC MODECLUS).

It may be worthwhile to determine the number of clusters by using multiple methods and seeing if they agree.

Good luck,

Koen

partha1 — Sun, 21 Feb 2016 06:58:24 GMT

Thank you. How to fix appropriate radius(r) for the significance test in Kth nearest neighbor?