R help - Aug 2010 - coxph

Hello,
when using coxph function from survival package, what do you do if you encounter
such problem like:
 
Warning message:
In fitter(X, Y, strats, offset, init, control, weights = weights,  :
  Loglik converged before variable  3,4 ; beta may be infinite. 
 

Thanks! 		 	   		  
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On Aug 9, 2010, at 8:17 PM, Hongying Li wrote:
>
> Hello,
> when using coxph function from survival package, what do you do if  
> you encounter such problem like:
>
> Warning message:
> In fitter(X, Y, strats, offset, init, control, weights = weights,  :
>  Loglik converged before variable  3,4 ; beta may be infinite.
It generally does not signal a problem. You can, of course, check to  
see if any betas are unexpectedly large. I have never found that  
unusually large estimates after such a warning.

-- 
David Winsemius, MD
West Hartford, CT