coxph.detail() does not work

Hello everyone,

I tried to use coxph.detail() to get the hazard function.  But a warning
messge always returns to me, even in the example provided by its help
document:

?coxph.detail
fit   <- coxph(Surv(futime,fustat) ~ age + rx + ecog.ps, ovarian, x=TRUE)
fitd  <- coxph.detail(fit)

Warning message:
data length [37] is not a sub-multiple or multiple of the number of
rows [12] in matrix

Can anyone suggest why it does not work?


I use R 2.1.1 with Windows XP


Thanks a lot.


Zhen Zhang