[R-sig-Epi] About parametric survival analysis

[Martina Gandini]

Good afternoon R-users!
I have a question about survival analysis.
I have a set of data for which I calculate non parametric survival
function using the classical Kaplan-Meier estimation.

Data are in the following form

date of birth, date of exit, censor


Now I want to compare the "Kaplan-Meier" curve with a parametric survival
curve (a Weibull seems to be a reasonable choice in my example). Is there
a function in R to do this?
Thanks a lot!

Martina Gandini