[R] Hazard function or cumulative Hazard function in R

[yassir rabhi]

   Hi, 
 I'm student from canada, and i'work in survival
analysis.I want to know if there is a hazard function
or cumulative hazard function in R or not, i know how
to program it, but it is easy to use it if they exists
in R.
Thanks.
                                          Yassir