Dear all, I have a beginner's R question for coxph() and survfit(). I have a data set with survival time (no censoring) and treatment indicator(0/1). I did something like
fit<-coxph( Surv(t)~treat, method="breslow",data=data) > fit Call: coxph(formula = Surv(t) ~ treat, data = data, method = "breslow") coef exp(coef) se(coef) z p treat -1.96 0.140 0.243 -8.07 6.7e-16 Likelihood ratio test=80.3 on 1 df, p=0 n= 144 > plot(survfit(fit)) 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. Thanks you so much for your help. Jimmy Chu [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html