Add my name to those who think this is a good change. As someone who works daily with medical research data, the number of times I have been caugth by failure of statements like as.Date(ifelse( is.na(prog.dt), lastfu.dt, prog.dt) is a large annoyance. Replace ifelse by any number of selection processes for choosing among ending dates.
Terry T. -- Terry M Therneau, PhD Department of Quantitative Health Sciences Mayo Clinic [email protected] "TERR-ree THUR-noh" [[alternative HTML version deleted]] ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
