Dear R users,
My apologies for the simple question, as I'm starting to learn the concepts
behind the Cox PH model. I was just experimenting with the survival and rms
packages for this.
I'm simply trying to obtain the expected survival time (as opposed to the
probability of survival at a given time t). I can't seem to find an option
from the "type" argument in the predict methods from coxph{survival} or
cph{rms} that will give me expected survival times.
library(rms)
options(na.action=na.exclude) # retain NA in predictions
fit <- coxph(Surv(time, status) ~ age + ph.ecog, lung)
fit2 <- cph(Surv(time, status) ~ age + ph.ecog, lung)
head(predict(fit,type="lp"))
head(predict(fit2,type="lp"))
Thank you.
Regards,
Axel.
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