Hi, I am using hclust and cutree to cluster a data frame y and cut it into few clusters as follows y V1 V2 V3 V4 A 1 2 3 4 B 5 6 7 8 C 9 10 11 12 D 13 14 15 16 E 17 18 19 20 > clu<-hclust(dist(y),method="complete") clu<-hclust(dist(y),method="complete") > clu Call: hclust(d = dist(y), method = "complete") Cluster method : complete Distance : euclidean Number of objects: 5 > plot(clu) > ct<-cutree(clu,k=3) > rect.hclust(clu,3,border="red") > ct A B C D E 1 1 2 2 3 The question is how to plot the cluster number on the dendrogram plot? Any help is appreciated. [[alternative HTML version deleted]]