Dear listers, glmmPQL (package MASS) is given to work by repeated call to lme. In the classical outputs glmmPQL the Variance Structure is given as " fixed weights, Formula: ~invwt". The script shows that the function varFixed() is used, though the place where 'invwt' is defined remains unclear to me. I wonder if there is an easy way to specify another variance structure (eg varPower, etc..), preferably using an lme object of the varFunc classes ? Some trials show that the 'weights' argument of glmmPQL is just the same as in glm (which is clearly stated in the help) and I wonder actually, if not a nonsense, how to pass eg a 'weights' arguments as used in lme (eg weights=varPower()) to specify a variance function (in the same way as a correlation structure can be passed easy).
Thanks in advance for any hint, Patrick ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
