[R] error message obtained when plotting survival curves (error not previously obtained)

[David Winsemius]

I cannot reproduce the error:

 > sessionInfo()
R version 2.8.1 Patched (2009-01-19 r47650)
i386-apple-darwin9.6.0

locale:
en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] splines   stats     graphics  grDevices utils     datasets   
methods   base

other attached packages:
[1] surv2sample_0.1-2 lattice_0.17-20   Design_2.1-2       
survival_2.34-1   Hmisc_3.5-2
[6] boot_1.2-35

loaded via a namespace (and not attached):
[1] cluster_1.11.12 grid_2.8.1      tools_2.8.1

Be on notice that survfit in Design masks survfit in survival, but no  
error re-appears after detaching Design and Hmisc.

-- 
David Winsemius


On Mar 31, 2009, at 5:14 PM, Bob Green wrote:

>
> Hello,
>
> I now receive an error message when obtaining a survival plot, which  
> was not previously received with the same code. I recently updated  
> all my packages. It does not seem to be a peculiarity of my data as  
> I receive the error using data available in R. A plot is produced  
> but I am uncertain regarding the error message.
>
>
>
> > library(surv2sample)
> > data(gastric)
> > fit <- survfit(Surv(time, event) ~ treatment, data = gastric)
> Error in get(x, envir = ns, inherits = FALSE) :
>  variable "survfit.km" was not found
> > #Default plot:
> > plot(fit)
>
>
> regards
>
> Bob Green
>
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT