Right, but you still can sandwich them if you want. (I recently did that in Proc MIXED, but Michael, I'm not sure how to do it using lme).
best, -tony On Fri, 14 Jan 2005 11:16:10 -0800, Berton Gunter <[EMAIL PROTECTED]> wrote: > ??? > correlated within group errors are explicitly modeled by corStruct classes. > See ?lme and Chapter 5.3 in Bates and Pinheiro. > > -- Bert Gunter > Genentech Non-Clinical Statistics > South San Francisco, CA > > "The business of the statistician is to catalyze the scientific learning > process." - George E. P. Box > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Na Li > > Sent: Friday, January 14, 2005 8:42 AM > > To: [email protected] > > Subject: [R] empirical (sandwich) SE estimate in lme ()? > > > > > > Is it possible to get the empirical (sandwich) S.E. estimates for the > > fixed effects in lme () (thus allowing possibly correlated > > errors within > > the group)? In SAS you can get it by the 'empirical' option > > to PROC MIXED. > > > > Cheers, > > > > Michael > > > > -- > > Na (Michael) Li, Ph.D. > > Division of Biostatistics A443 Mayo Building, MMC 303 > > School of Public Health 420 Delaware St SE > > University of Minnesota Minneapolis, MN 55455 > > Phone: (612) 626-4765 Email: [EMAIL PROTECTED] > > > > Fax: (612) 626-0660 http://www.biostat.umn.edu/~nali > > > > ______________________________________________ > > [email protected] mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide! > > http://www.R-project.org/posting-guide.html > > > > ______________________________________________ > [email protected] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > -- best, -tony "Commit early,commit often, and commit in a repository from which we can easily roll-back your mistakes" (AJR, 4Jan05). A.J. Rossini [EMAIL PROTECTED] ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
