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139792
2006 Dec 05
0
How to join data.frames containing Surv objects?
...structure by rbind() or
merge() I cannot find a way to preserve the class of a Surv object (see
example).
Reading the help page for rbind, I an uncertain if I could expect that a
Surf oject retains it's class, but I would wish it did.
Thanks
Heinz T?chler
R version 2.4.0 Patched (2006-11-03 r39792)
Windows XP
library(survival)
## create example data
starttime <- rep(0,5)
stoptime <- 1:5
event <- c(1,0,1,1,1)
group <- c(1,1,1,2,2)
## build Surv object
survobj <- Surv(starttime, stoptime, event)
## build data.frame with Surv object
df.test <- data.frame(survobj, g...