Hi Sir I am new user of 'cluster' and 'amap' packages for hierarchical clustering. I want to find the optimum number of clusters described by Mojena (1977) 'Hierarchical grouping methods and stopping rules: An evaluation' The Computer Journal, 20(4). I did not find the such function for optimal choice of clusters. Some suggestions or hints are required. Thank you -- AMINA SHAHZADI Department of Statistics GC University Lahore, Pakistan. [[alternative HTML version deleted]]