Hello everyone,
I have been trying to use the timedep(predictor) capability of the
frailtypack package in order to include time-varying covariates in a
frailty model. The following is an example of the code I use:
sha.time <- frailtyPenal(Surv(time,event)~cluster(id)+timedep(age)
,Frailty=TRUE,data=StudyData,n.knots=8,kappa1=1)
However, I get the following error message when running the above code.
Error in eval(expr, envir, enclos) : could not find function "timedep"
I do get model parameter estimates when I remove timedep() from the syntax.
Thanks in advance for your help and pointers
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