On Nov 21, 2009, at 4:28 PM, <cr...@binghamton.edu> wrote:
Is there a way to make the plot(cox.zph(model)) use some other symbol than open circles?
Yes, but after looking at the code, the points call does not have trailing "..." so, not without modifying the function:
library(survival) methods(plot) getAnywhere(plot.cox.zph) Now just hack the function: plot.cox.zph <gives you the function arguent list and body. plot.cox.zph2 <- <insert arguments and code here> And change these lines: + if (resid) + points(xx, y) + lines(pred.x, yhat) to + if (resid) + points(xx, y, ...) + lines(pred.x, yhat) Then using the example in help(cox.zph) : plot.cox.zph2(temp, pch=4) gives you "x"'s instead of "o"'s -- David Winsemius, MD Heritage Laboratories West Hartford, CT ______________________________________________ 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.
