[R] Kaplan-Meier survfit problem

David Winsemius dwinsemius at comcast.net
Sun Dec 11 01:14:17 CET 2011

On Dec 10, 2011, at 6:39 PM, capitantyler wrote:

> done it, again, i have the next problem
> my traduction:
> "The object (list) cannot be corced as "double"
> Original:
> *km1 <- survfit(Surv(as.numeric(T.201110))~1)*
> Error en Surv(as.numeric(T.201110)) :
>  el objeto (list) no puede ser coercionado a 'double'

I do not read that language, but I am surprised to see a single vector  
being used as an argument to Surv(). When I use Surv(. , .) it is with  
two vectors, an interval and a censor variable.

> note that need it convert to numeric class, otherwise:
> *km1 <- survfit(Surv((T.201110))~1)*
> Error en Surv((T.201110)) : Time variable is not numeric
> --
> View this message in context: http://r.789695.n4.nabble.com/Kaplan-Meier-survfit-problem-tp2015369p4181476.html

Context? Yes. We do want context, but we don't want to go to no  
steenking Nabble.

> Sent from the R help mailing list archive at Nabble.com.
Arrrgh. The rhelp mailing list is NOT at Nabble. Nabbel si a  
commercial mirror of the real thing. And it isn't really an archive.  
either, since they start discarding posts after a year or two.

David Winsemius, MD
West Hartford, CT

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