Hi all, I have installed in R 2.6 the survival package and I am trying to analyze some data and present plots. The problem occurs when I try to plot lines on the same plot. E.g. take simulated data for time (t), event (e) and groups (group1 and group2) and do: ### this is how I create the plots plot1<-survfit(Surv(t,e)~ as.factor(group1)) plot2<-survfit(Surv(t,e)~ as.factor(group2))
plot(plot1) lines(plot2,type="s") Error in rep(2, n2 - 1) : invalid 'times' argument The plot is created (plot1) but the lines (plot2) are not. I have run this same program several times from my previous pc (R 2.4 was installed)and I never had such a problem. Now suddenly this error message appears and it concerns only the survival package (I mean for simple plots there is no problem to plot lines in an existing plot). Is there a problem with R 2.6 on this matter? Can someone please help? Thank you, Makis ______________________________________________ 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.
