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logit
2008 Dec 06
1
Questions on the results from glmmPQL(MASS)
...elow.
I have three questions, anybody can give me possible answers?
Q1:From the results, we see that R get 'NAs'for AIC,BIC and logLik, while
S-PLUS8.0 gave the exact values for them. Why? I had thought that R should
give the same results as SPLUS here.
Q2: The model to analyse the data is logity=b0+u+b1*trt+b2*I(week>2), but
the results for Random effects in R/SPLUS confused me. SAS may be clearer.
Random effects:
Formula: ~1 | ID
(Intercept) Residual
StdDev: 1.410637 0.7800511
Which is the random effect 'sigma'? I think it is "1.41...