Hi,
I have survival data from a population:
time alive treatment
0 20 A
3 12 A
5 10 A
8 7 A
10 7 A
15 5 A
20 5 A
(time=0 is start of the experiment and initial number of individuals is
alive=20; time=20 is end of experiment)
If I don't misunderstood the survival documentation, always a survival
object is required, i.e. created with function Surv(time, event)
So I have to transform my data (assuming no censoring, event=0 is alive
and event=1 is dead):
time event treatment
20 0 A
20 0 A
20 0 A
20 0 A
20 0 A
15 1 A
15 1 A
8 1 A
8 1 A
8 1 A
5 1 A
5 1 A
3 1 A
3 1 A
3 1 A
3 1 A
3 1 A
3 1 A
3 1 A
3 1 A
Is there a function or any other [R] code doing this?
or
Is it possible to perform survival analysis direct from
population data set?
Thanks for any help
Jens
--
Jens Schmidt TU Dresden -Inst. f. Hydrobiologie-
Tel. +49-(0)351-463-36284 Mommsenstrasse 13
Fax +49-(0)351-463-37108 01062 Dresden
R.F.A.
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