Hi everyone,
I am not new to R, but new to running survival models in R.
I am trying to create some basic KM curves, using the following code:
library(survival)
library(KMsurv)
(import data etc - basic right censored, with continuously observed time of
death)
sleepfit <- survfit(Surv(timeb, death), data = sleep)
Here timeb is measured is survival in years, death is a 1/0 indicator (1 =
event = death), and the dataset is called sleep.
But I get the following error
Error in UseMethod("survfit", formula) :
no applicable method for 'survfit' applied to an object of class "Surv"
I'm not sure what I'm doing wrong, as I followed the example from
the following paper
http://anson.ucdavis.edu/~hiwang/teaching/10fall/R_tutorial%201.pdf , page 4 as
a guide.
I also tried
sleepfit <- survfit(Surv(timeb, death==1), data = sleep)
and
sleepfit <- survfit(Surv(starttime, endtime, death), data = sleep)
Can anyone tell me what I might be doing wrong?
Thanks,
Lucy
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