A question about the documentation

[VitorBSP]

I'm taking a survival analysis class, and in elementary concepts, we're studing Nelson-Aalen estimator and Kaplan-Meier.

I think in the package, Kaplan-Meier estimador is give by:

survfit(Surv(time,status)~1)

And Nelson-Aalen is:

survfit(Surv(time,status)~1, stype = 2)

Am I correct? If yes, I think that should be better in documentation. I can do a PR to improve it, if my view are right.

[therneau]

You are incorrect. The result of survfit contains both the survival and cumulative hazard estimates. By default the survival estimate is the KM (stype=1), and the cumulative hazard estimate is the Nelson-Aalen (ctype=1). To plot the cumulative hazard see help("plot.survfit"), and look at the cumhaz argument.