[R] censored bootstrap

[Vittorio Addona]

Hello,
I have been trying to use the censored bootstrap function 'censboot'
from the library boot, with the function 'survfit' from the library
survival5.  My code is:

surv.fun <-function(data) {
  sur<-survfit(Surv(data[,1],data[,2]), data=data)
  }
c.boot<-censboot(m,surv.fun,R=99)

m is my data set

I get the error message:
Error in eval(attr(formula,"variables"),data,sys.frame(sys.parent( ))):
    sys.frame: not that many enclosing functions

Does anyone know what this means, or what I'm doing wrong?  Thank you
very much.

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