Sorry, my previous email seems to have come through in a rather odd format. Also I forgot to add version and OS information, now included below. My original query was:
I have attempted to follow posting guidelines but I have failed to find out what I am doing wrong here. I am trying to use lines.survfit to plot a second curve onto a survival curve produced by plot.survfit. In my case this is to be a progression free survival curve superimposed upon an overall survival curve, but I will illustrate my problem using the example given in the help for lines.survfit. I would like to have tick marks for censored data points on both curves, so I would like to do something like: > fit <- survfit(Surv(time, status) ~ sex, pbc,subset=1:312) > plot(fit[2], mark.time=TRUE, xscale=365.24, + xlab='Years', ylab='Survival') > lines(fit[1], lwd=2, xscale=365.24, mark.time=TRUE) but when I do this, no tick marks appear on the second curve. Can anyone see what I am doing wrong here? Rachel Here are the version data: platform i386-pc-mingw32 arch i386 os mingw32 system i386, mingw32 status major 2 minor 1.1 year 2005 month 06 day 20 language R ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
