topic Re: How to define the number of clusters for the cluster procedure. in SAS Procedures

How to define the number of clusters for the cluster procedure.

wutao9999 — Tue, 10 Mar 2015 18:42:25 GMT

For the SAS cluster procedure, how to define the number of clusters as cluster output? For example, if I want to have 3 clusters after clustering:

cluster method = eml data = dateset outtree = output ;

by column1 ;

var net_sales ;

run ;

What changes I need to make to enforce the above cluster procedure only generating 3 clusters? Thank you.

Re: How to define the number of clusters for the cluster procedure.

mohamed_zaki — Wed, 11 Mar 2015 12:14:47 GMT

PROC CLUSTER requires more work to do. Why do not you use PROC FASTCLUSTER and use the maxc= option in it. Also you can added it to a macro to try different number of cluster.

But if you still need to use PROC CLUSTER you can use PROC TREE after it and use nclusters= option to choose the number of cluster. Here is a good example of using PROC CLUSTER and PROC TREE. Example 91.1 Mammals’ Teeth