chen chen wrote:
Hi Fello:
I am asked to compute the Kaplan-Meier estimator of data with right
censoring without using surfit().
I.e., a homework problem...
For such problem people will at best offer hints.
The KM estimator is the
---> cumulative product
of
---> decrements
that depend on
---> the number at risk at the event times.
This gives you a list of three things that you need to figure out how to
calculate.
> Does anyone know how to use R to
compute the estimators?
The data should input X: vector of right-censored observed time for n
individuals, and d: vector of failure time indicators (0=censored
individual;1=unconsored individual)
and the function should return with t: vector of sorted observed
event times, in increasing order; and km:
vector of Kaplan-Meier estimates, corresponding to t.
Thanks
Best Regards,
_________________________________________________________________
owitworks_012009
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