The survreg function uses case weights. That is, if a subject is given a weight of 2, the result is the same as if there were a second observation (exactly the same).
Early in my career data sets that contained only categorical variables were often collapsed in just this way, in order to save on computer memory and allow the analysis of larger problems. (Continuous variables such as age might be turned into categorical to facilitate the collapse). Long, long ago in computer time... Terry Therneau ______________________________________________ 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.
