Message-ID: <BAY1-F29EFA01D5EF1A8BD3526BF84090@phx.gbl>
Date: 2005-05-20T06:48:32Z
From: Luka Kos
Subject: survival probabilities from survival tree (rpart)
Hi!
How to compute probabilities of survival from rpart object?
Consider the following example:
library(rpart)
survtree <- rpart(Surv(time,status)~., data=aml)
This code will produce the following survival tree:
1) root 23 26.44184 1.0000000
2) x=Maintained 11 12.61182 0.6848303 *
3) x=Nonmaintained 12 10.81338 1.4426070 *
If I am not wrong the rightmost numbers are relative risks compared to whole
population (e.g. root node). How to get survival probability function
S(t|x)?
Regards,
Ludvik