Hello everyone, I have a question about trees. I am writing my own clustering algorithm in R and I would like to save results to a tree, so that I could print it, just like hclust does. Basically this is agglomerative method for networks/matrices (I am writing it all on matrices, so no network packages are included), which gives for every iteration a pair of elements which are subseqently removed from a sample (matrix) and instead a new element summing up those two is added. My question is: how to agglomeratively insert such data into a tree object, so that I could print it afterwards. With regards and wishes of a happy new year! Albert Hupa Zak?ad Metod Badania Kultury Instytut Stosowanych Nauk Spo?ecznych UW University of Warsaw albert.hupa at gmail.com tel. 696 435 672