I sent out this message a couple of days ago. Yet received no reply. There is a possibility that my description is not very clear or example is not highly specific. I am just wondering if anybody could point out (or have seen) a similar function that can do this job for lme model. Thanks. Note: forwarded message attached. __________________________________ -------------- next part -------------- An embedded message was scrubbed... From: unknown sender Subject: no subject Date: Tue, 18 Oct 2005 10:45:50 -0700 (PDT) Size: 1006 Url: https://stat.ethz.ch/pipermail/r-help/attachments/20051020/93b1519e/attachment.mht