I posted several months about the problem with adding tick marks to curves
using lines.survfit.
This occurs when lines.survfit is used to add a curve to survival curves
plotted with plot.survfit. The help for this function implies that
mark.time=TRUE thus:
plot(pfsfit,conf.int=FALSE,xscale=365.25,yscale=100,xlab="Years",ylab="%
surviving",lty=2,mark=3)
lines(osfit,mark=3,col=1,lty=1,xscale=365.24,mark.time=TRUE)
will add tick marks to the added curve in the same way that they appear on
the first curve, but no permutation of mark, col, lty, etc. seems to produce
tick marks. Has anyone found a solution to this problem?
Rachel
British Society of Blood and Marrow Transplantation
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