-- begin included message ---
> (basehazzft.ln$stra[285])
[1] stra=2
134 Levels: stra=1 stra=10 stra=100 stra=101 stra=102 ... stra=99
> c(basehazzft.ln$stra[285])
[1] 47
while the desired value is 2, I get a 47. What am I doing wrong? I tried
the as.numeric function but I have the same problem..
> -Original Message-
> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-
> project.org] On Behalf Of ?e???da? ?pa?t??
> Sent: Tuesday, October 27, 2009 3:51 PM
> To: r-help@r-project.org
> Subject: [R] cox regression extract strata as numeric
>
>
>
Hi there,
I perform a stratified cox and then I need the strata as a numeric array
"straft.ln"
ft.ln <-
coxph(Surv(times,deaths)~ages+chemos+chemos:f1+chemos:f2+horms+horms:f1+horms:f2+grades+grades:f1+grades:f2+positives+positives:f1+positives:f2+sizes+sizes:f1+sizes:f2+strata(stra),data=ddd)
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