topic Re: How can I decide the best number of clusters within 'Proc Fastclus'? in SAS Data Science

How can I decide the best number of clusters within 'Proc Fastclus'?

Crubal — Wed, 12 Oct 2016 14:46:46 GMT

Hi, I have a question when working on cluster analysis.

How can I draw an Elbow Evaluation plot in determining the best number of clusters? Thanks!

proc fastclus
data=HOTEL_EMEA 
maxc=10
maxiter=10
out=clust;
var avg_pct;
run;

Ksharp — Thu, 13 Oct 2016 03:13:07 GMT

I would do Primary Component Analysis and get those two PC and polt them by proc sgplot ,and you could probably get N of clusters.

Babloo — Mon, 17 Oct 2016 18:08:38 GMT

Ksharp,

Could you please give me one simple example? What do you mean by 'get those two PC' in your reply?

Ksharp — Tue, 18 Oct 2016 04:25:31 GMT

use proc princomp to get two primary component of your data. And plot them at X-Y axis .you can see the number of cluster you should split.

Here is an example:

Crubal — Tue, 18 Oct 2016 20:34:03 GMT

Cool!

Babloo — Wed, 19 Oct 2016 14:39:57 GMT

Can we cluster analysis only with continous varaibles?