Is there any function for finding number of groups using upper tail rule or moving average approach suggested by Mojena? I would also like to find functions for other stopping rules in Hierarchical clustering method. If anyone knows please kindly let me know. Kind regards, Ms.Karunambigai M PhD Scholar Dept. of Biostatistics NIMHANS Bangalore India Now, send attachments up to 25MB with Yahoo! India Mail. Learn how. http://in.overview.mail.yahoo.com/photos [[alternative HTML version deleted]]