On Wed, 30 Mar 2005, Chao Zhu wrote:
But it only gives me the curve with combined treatment. How do I get a
plot with two curves for different treatments. I don't want to do
new<-data.frame(treat=c(0,1)) and plot(survfit(fit,newdata=new))
cause it gives you predicted curves for two treatments.
I think you are going to have to be clearer about what you want. If you
want the Kaplan--Meier estimator for each treatment separately then
plot(survfit(Surv(t)~treat))
will do it. Otherwise I don't know what you're trying to do.
By the way, do you really have no censoring in the time variable?
-thomas