search for: statug_mixed_sect034

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2013 Apr 30
1
Mixed Modeling in lme4
...ift from running mixed models in SAS using PROC MIXED to using lme4 package in R. In trying to match the coefficients of R output to that of SAS output, I came across this problem. The dataset I am using is this one: http://support.sas.com/documentation/cdl/en/statug/63033/HTML/default/viewer.htm#statug_mixed_sect034.htm If I run the following code: proc mixed data=rc method=ML covtest; class Batch; model Y = Month / s; random Int Month / type=cs sub=Batch s; run; The Fixed effect coefficients match with that of R. But the random effect does not. Here is the R code: rc <- read.table('rc.csv', sep...