Message-ID: <EXECMAIL.1021126115756.A@UNIVERSI-ISEUQ0.ucc.hull.ac.uk>
Date: 2002-11-26T11:57:56Z
From: L.E.Gross
Subject: Defining a Design Matrix for Correlation
Dear list
I am using the 'geese' command in the geepack Package add-on to R.
I am wanting to define my own correlation matrix for 4 time occasions
such that there is correlation between times 1&2, 1&3, 2&4 and 3&4 but
not 1&4 and 2&3.
There is an option to define a design matrix called zcorr. Could anyone
tell me how I can create this design matrix such that it will show the
correlations that I need to include?
Many thanks
Laura
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._