Dear all I would like to know if there is some clustering provedure which does the following.Given a data set with n observations on k variables with correlations matrix R (k x k) I would like to obtain 3 cluster of approximatively equal size n1=n2=n3 that satisfy the following condition. The correlations matrix of each of the three subgroups should be as close as possible each other and with respect to the pooled correlation matrix, That is R1=R2=R3=R Do you have any suggestions or ideas on how to proceed to obtain such partitions? Thanx a lot Massimiliano Marinucci Phd candidate Universidad Complutense Madrid ==================================================== This email is confidential and intended solely for the use of the individual or organisation to whom it is addressed. Any opinions or advice presented are solely those of the author and do not necessarily represent those of the Millward Brown Group of Companies. If you are not the intended recipient of this email, you should not copy, modify, distribute or take any action in reliance on it. If you have received this email in error please notify the sender and delete this email from your system. Although this email has been checked for viruses and other defects, no responsibility can be accepted for any loss or damage arising from its receipt or use. ====================================================