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I ran the following code in S-Plus 6.2 running on Win 2k.
options(contrasts=c(factor="contr.SAS",ordered="contr.poly"))
fm2 <- lme(WLFFUN ~ age|SUBNUM, data=""
I hope someone can help me understand the meaning and solution to the error message listed below.
Problem in contr.SAS("TRUE", T): Contrasts not defined for 0 degrees of freedom
Use traceback() to see the call stack
Thank you,
John
John Sorkin M.D., Ph.D.
Chief, Biostatistics and Informatics
Baltimore VA Medical Center GRECC and
University of Maryland School of Medicine Claude Pepper OAIC
University of Maryland School of Medicine
Division of Gerontology
Baltimore VA Medical Center
10 North Greene Street
GRECC (BT/18/GR)
Baltimore, MD 21201-1524
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