[R] Error in Surv(time, status) : Time variable is not numeric

[Braem M]

Thank you for your reply.

Even when I put data=..  in my model statement, I get the same error.



Chris Andrews wrote:
> 
> R is finding the R function 'time' rather than your variable time in your
> dataset.  Perhaps adding 'data=mydata' to your function call will resolve
> your issue.
> 
> Chris
> 
> 
> Braem M wrote:
>> 
>> Dear,
>> 
>> I want to analyze two-level survival data using a shared frailty model,
>> for which I want to use the R package 'Frailtypack", proposed by Rondeau
>> et al. The dataset was built using SAS software. I also tried to change
>> the format using SPSS and Excell. 
>> 
>> My (reduced) dataset has following column names:
>> ID     entry    time    status    family     var1
>> 
>> I used following command:
>>> frailtyPenal(Surv(time, status) ~var1 + cluster(family), Frailty=TRUE
>>> ,n.knots=8, kappa1=1500,
>> + cross.validation=FALSE)
>> 
>> And got this error :
>> Error in Surv(time, status) : Time variable is not numeric
>> In addition: Warning message:
>> In is.na(time) : is.na() applied to non-(list or vector) of type
>> 'closure'
>> 
>> I think R transforms the data when importing into R, so that the
>> observations are not numeric anymore.
>> 
>> Does anyone know how to handle this problem?
>> 
>> Thanks,
>> 
>> Marie
>> 
> 
> 

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