2 messages · Zhen Zhang, Thomas Lumley
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
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?
It does work. That's a warning, not an error. If you want to know why the warning is there, it's because the code turns a 37-element vector into a 12x3 matrix. This drops the last element. In S-PLUS, and in some older versions of R, there is no warning, but in current R there is a warning. The answer is the same, though. -thomas