Hi,In SPlus, I use the function 'cluster' with GLM to adjust for correlated
errors within a cluster ( e.g. cluster(ID)) as a covariate. Is there a
similar function in R to use with GLM ? I am new to R.  Thanks.

V.K. Chetty

-- 
Professor of Family Medicine
Boston University
Tel: 617-414-6221, Fax:617-414-3345
emails: chettyvk@gmail.com,vchetty@bu.edu

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