Dear list-eners,
I run into the following problem when I want to get contrasts from a coxme
model using the lsmeans package: A call to lsmeans on the coxme model
throws the following error:
Error in if (adjustSigma && object$method == "ML") V = V *
object$dims$N/(object$dims$N - :
missing value where TRUE/FALSE needed
I give an example:
library(coxme)
library(lsmeans)
fm <- coxme(Surv(y, uncens) ~ trt + (trt | center) + strata(center),
data=eortc)
summary(fm)
lsmeans(fm, ~ trt)
traceback points to the internal function lsmeans:::lsm.basis.lme()
Any ideas?
Thanks in advance.
-m
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