[R] how to retrieve robust se in coxph

[Thomas Lumley]

On Wed, 15 Feb 2006, Lei  Liu wrote:

> Hi,
>
> I am using coxph in simulations and I want to store the "robust se" (or
> "se2" in frailty models) for each replicate. Is there a function to retrieve
> it, like vcov() for the variance estimate? Thanks!
>

There isn't a function, so you need to extract the $var2 component of the 
model object to get the variance matrix.

 	-thomas