[R] function 'vcov' for coxph in R 2.0.0

Prof Brian Ripley ripley at stats.ox.ac.uk
Fri Nov 19 18:22:51 CET 2004

Your version of survival is out of date: please use update.packages().

On Fri, 19 Nov 2004, Lei  Liu wrote:

> Hi there,
> After I fitted a cox model, I used vcov to obtain the variance of the 
> parameter estimate. It worked correctly in R 1.9.1. But it failed in R 2.0.0 
> and the error message is 
> Error in vcov(cox.1) : no applicable method for "vcov"
> I don't know if it is a bug or there is some update on this function. Thanks!

WHY don't you know if there is an update?

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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