Your example is not reproducible without 'library(survival)'.
When I include that, I get
> head(D,20)
stime status surv
1 176 TRUE 176
...
Objects of class "Surv" are from the contributed package survival, and you
need that attached to deal with them properly.
On Wed, 12 Dec 2007, [EMAIL PROTECTED] wrote:
> Full_Name: Edward McNeil
> Version: 2.6.1
> OS: Windows
> Submission from: (NULL) (203.170.234.5)
>
>
> I want to show students how the survival object looks like in R.
> Reproducible example:
>
> library(MASS)
> data(Aids2)
> attach(Aids2)
> status <- status=="D"
> stime <- death-diag
> surv <- Surv(stime, status)
> D <- data.frame(stime, status, surv)
> head(D,20)
> stime status x..i..
> 1 176 TRUE 176
> 2 67 TRUE 67
> 3 432 TRUE 432
> 4 77 TRUE 77
> 5 275 TRUE 275
> 6 373 TRUE 373
> 7 389 TRUE 389
> 8 1027 TRUE 1027
> 9 492 TRUE 492
> 10 434 TRUE 434
> 11 16 TRUE 16
> 12 308 TRUE 308
> 13 92 TRUE 92
> 14 265 TRUE 265
> 15 1052 FALSE 1052+
> 16 132 TRUE 132
> 17 527 TRUE 527
> 18 581 FALSE 581+
> 19 511 FALSE 511+
> 20 151 TRUE 151
>
> detach(Aids2)
>
> The 'surv' column is strangely labelled 'x..i..'.
>
> ______________________________________________
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> https://stat.ethz.ch/mailman/listinfo/r-devel
>
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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