proc fastclus output interpretation


I am using proc fastclus to perform k-means clustering.

In Figure 42.2: Cluster Summary Table from the FASTCLUS Procedure, an R-square value is reported (please see link below).

According to the documentation, this is the R-square value for predicting the variable from the cluster. Is this a result from fitting a linear regression model Variable_value=cluster?
Can someone explain this?



Less is more. Stay pure. Stay poor.
I would say it reads as R^2 is from modeling: Measurement = Clustergroup + e. Let me see if there is anymore documentation.