Hello Thomas,
I had been using both survival & design packages. I have just tested
both packages and can report that the error only appears after
loading Design. If I just run survival there is no error.
regards
Bob
At 06:08 PM 1/04/2009, Thomas Lumley wrote:
On Wed, 1 Apr 2009, 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)
You don't show what packages you have loaded. My guess would be
that you are calling Design::survfit rather than survival::survfit,
and the problem is due to the incompatibility between the most
recent versions of Design and survival. Frank Harrell and the folks
at Vanderbilt are working on a new version of Design.
-thomas
Thomas Lumley Assoc. Professor, Biostatistics
tlum...@u.washington.edu University of Washington, Seattle
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