??? 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
