[R] Anova for stratified Cox regression

Peter Dalgaard P.Dalgaard at biostat.ku.dk
Tue Jan 15 18:02:11 CET 2008


Peter Dalgaard wrote:
> (Did you check the latest version? Mine is what came with 2.6.1.)
D'oh. I could just have checked R-devel myself. It is doing the same
thing. Also,

> m2 = coxph(Surv(time, status) ~ strata(sex), data=d)
> summary(m2)
Error in summary.coxph(m2) : Input is not valid
In addition: Warning message:
In is.na(beta) : is.na() applied to non-(list or vector) of type 'NULL'

-- 
   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45) 35327907




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