Murphy Choy

Cluster Analysis: CCC, PFS and PTS.

In Uncategorized on May 23, 2011 at 2:30 am

Most SAS programmers who are familiar with PROC Cluster will have some degree of familiarity with CCC which is one of SAS’s greatest contribution to cluster analysis. However, few people are aware of the other options for determining the number of clusters.

The two other major options are Pseudo F-squared statistics and Pseudo T-squared statistics. These two major statistics are almost as powerful as CCC in terms of estimating the natural number of clusters. Some advantages in using these statistics is that they show a multitude of possible solutions for the number of clusters.

However, much of their use have been superseded by CCC. Many other softwares still retain these two major statistics but in the case of SAS Enterprise Miner and Base SAS/SAS Stat, the default is CCC.


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