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optimum
2001 Dec 05
1
how to obtain EM-estimates of cov(b) and var(e) from lme
Hi,
I have a simple random-coefficients model for m subjects:
y = b0 + b1 x + r0 + r1 x + e
where b0 and b1 are fixed parameters, r0 and r1 are random,
e ~ N(0,s2 I) and R' = [r0, r1] ~ N(0,T).
I try to obtain the EM-estimates of s2 and the elements of T by
lme(y~x,data=mydata,random= list(group=~x),
control=lmeControl(maxIter = 0, niterEM=100,msVerbose = TRUE))
Does