Hello, This pertains to the output data from PROC FASTCLUS. This may sound very ignorant, but I'm wondering if you get a measure of separation between clusters (a kind of "Between STD") when you subtract Within STD from Total STD?  I would then be interested in the ratio between this "Between STD" vs Within STD.  If not, should R^2 ratio be preferred as a measure of separation of clusters vs within cluster variation? Thank you! ... View more