[R] Anova for stratified Cox regression

[Peter Dalgaard]

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'

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   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
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