Trying to fit a model using the Surv() with a frailty term but get the following cryptic error message: ------------------------------------------------------------------------------ Error in frailty.brent(sqrt(x), y, lower = 0) : Ties for max(y), I surrender Calls: runplots ... coxpenal.fit -> eval -> eval -> <Anonymous> -> frailty.brent ------------------------------------------------------------------------------ When I remove the frailty term from the model it runs just fine. Does anyone know what this error message means?
Thanks, M. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
