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fit_cox
2009 May 10
2
plot(survfit(fitCox)) graph shows one line - should show two
R 2.8.1
Windows XP
I am trying to plot the results of a coxph using plot(survfit()). The plot should, I believe, show two lines one for survival in each of two treatment (Drug) groups, however my plot shows only one line. What am I doing wrong?
My code is reproduced below, my figure is attached to this EMail message.
John
> #Create simple survival object
>