[R] simple save question

David Winsemius dwinsemius at comcast.net
Wed Jul 13 22:33:16 CEST 2011

On Jul 13, 2011, at 1:10 PM, Tom La Bone wrote:

> I want to assign the value of rmean from a survfit object to a  
> variable so
> that it can be used in subsequent calculations, which is also what I
> interpreted the original poster to want. I did not understand Dr.  
> Therneau's
> answer to the original poster, so I figured I would provide a simple  
> example
> and see if someone could spoon feed me on how to do this. Dr.  
> Winsemius
> seemed to have gotten an answer, but I have not been able to  
> reproduce it.
> It appears to me that summary(fit) and summary.survfit(fit), where  
> fit is an
> object created by survfit, are the same thing (the example on the
> summary.survfit help page reinforces this idea). I have played with  
> the
> rmean=getOption('survfit.rmean') option in summary but I can't seem  
> to get
> anywhere.

No. That is only a flag which the summary.survfit function uses to  
determine whether to produce an rmean estimate. It should be a  
character value.

When it exists, the *rmean estimate will be in the summary(fit,)$table  
matrix (or vector).

Try this instead:

  options(survfit.rmean = "individual")


David Winsemius, MD
West Hartford, CT

More information about the R-help mailing list