Dear R helper, I encountered a problem when I tried to plot the cumulative failure rate (i.e. 1 - survival probability). I have used the following code to plot. The scenario is that patients are randomized to different treatment arm (rev in the code), the PCI revascularization was monitored over 5 years.
#R code testfit <- survfit(Surv(pcifu,pci)~rev,data=subproc) testfit$surv <- 1 - testfit$surv testfail <- plot(testfit, mark.time=FALSE,col=1:2, main='Failure Rate') #End of R code I arbitarily replaced testfit$surv by computing 1 minus the original survival rate. So far so good. However, when I plot the manipulated "testfit", there is a vertical line plotted at x=0, y=0:1. I checked testfit$time and testfit$surv, nothing weird there. I am very confused where the vertical line at starting point of time 0 came from. How can I get rid of it? Would you pleae help me with this? Thanks a lot! Jiang [[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.