我也想学习一下

恩我也是想学习一下 呵呵

有，如果类的太多树看的不是很清

in SAS, there are many methods which can be used for clustering, such as hierarchical methods ( single linkage, complete llinkage, average linkage and ward ...) and non-hierarchical method (K-means).
You can choose any of them according to the characteristic of your data set.

我也想学！！！