hello: my data looks like: time1 time2 event catagoria 2004 2006 1 C 2004 2005 0 C 2005 2010 1 E 2007 2009 1 C 2006 2007 0 E 2008 2010 0 C 2008 2010 1 E ... and the census interval is 1 year I have tried this surara<-survfit(Surv(time1,time2,event,type="interval")~categoria) but it is not working [[alternative HTML version deleted]]
______________________________________________ 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.