[R] How to access results of survival analysis

Prof Brian Ripley ripley at stats.ox.ac.uk
Sun May 7 13:55:01 CEST 2006

On Sun, 7 May 2006, Heinz Tuechler wrote:

> Hello Xiaochun Li!
> Thank you for submitting the function. At the time I had that problem I
> solved it in a somewhat different way.
> I changed a few lines in the print.survfit method. I introduced a parameter
> "ret.res=FALSE" set to false to preserve the normal behaviour of print.
> The second last line "invisible(x)" I changed to:
> if (ret.res)
> 	invisible(list(x,x1))
> else
> 	invisible(x)
> So print.survfit returned the results. Of course, Your method has the
> advantage to work as long as the output structure of print.survfit does not
> change. At the end I would prefer the original function to be changed and
> when I find the time I will submit a worked proposal to Thomas Lumley, the
> maintainer of the survival package. In that way it would be available also
> in future versions of survival.

But all print() methods are required to return their first argument 
unchanged, so


do the same thing.  See ?print.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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