Hey list,
I'm trying to compute a Wald chi squared for a random effects logit
model. It works when I do a regular logit, but I get this error with RE
logit:
waldtest(t1c1, test=("Chisq")) ## library(lmtest)
Error in update.default(fm, update) : need an object with call component
In addition: Warning message:
In object$call : $ operator not defined for this S4 class, returning NULL
...?
Also, is it possible to calculate Spearman's Rho for logit/RE logit
models in R?
Thanks,
didi & shahrzad