Hi, is there a way in R to identify those cluster methods / distance measures which best reflect predefined cluster groups. Given 10 observations O1...O10. Optimally, these 10 observations cluster as follows: cluster1: O1, O2, O3, O4 cluster2: O5, O6 cluster3: O7, O8, O9, O10. What I want is a method which identifies that cluster method / distance measure which best reflect my predefined groups. Is that somehow possible to do? Cheers -- View this message in context: http://r.789695.n4.nabble.com/Clustering-groups-tp2297210p2297210.html Sent from the R help mailing list archive at Nabble.com.