Hi, R users,
I'm using the "lme" function in R to estimate a 2 level mixed effects
model, in which the size of the subject groups are different. It turned out
that It takes forever for R to converge. I also tried the same thing in SPSS
and SPSS can give the results out within 20 minutes. Anyone can give me some
advice on the lme function in R, especially why R does not converge? Thanks.
Harry
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