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Your version of survival is out of date: please use update.packages().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