For log-normal you can use the coxme package instead. On 05/15/2014 05:00 AM, r-help-request at r-project.org wrote:> Hi everyone > > I am attempting to estimate a model with a frailty effect distributed as > a lognormal variable.I am using the following code: > frailtyPenal(formula, data, ..., RandDist = "LogN") > > I get the following error message: > Error in frailtyPenal(Surv(,) ~ + , : > unused argument(s) (RandDist = "") > > What can I do? Thanks for the help