R help - Jan 2011 - crash when using hazard.ratio.plot from rms package

Dear all,
I always encounter a crash when running hazard.ratio.plot from rms package with
my predictor as a factor.
It works fine when the predictor is a continous score. 
Anyone encounters this too? Is this a bug or something?
Thanks,
Lilian 		 	   		  
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On 2011-01-25 17:08, Hongying Li wrote:
>
> Dear all,
> I always encounter a crash when running hazard.ratio.plot from rms package
with my predictor as a factor.
> It works fine when the predictor is a continous score.
> Anyone encounters this too? Is this a bug or something?
Could you define "crash" for us?
Even better, include a *reproducible* example of your problem.

Peter Ehlers
> Thanks,
> Lilian 		 	   		
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

Hi:
>From the function's Description on its help page:
The hazard.ratio.plot function repeatedly estimates Cox regression
coefficients and confidence limits within time intervals. The log hazard
ratios are plotted against the mean failure/censoring time within the
interval.

^^^^
It would appear that the x argument of the function needs to be a numeric
time variable.

Dennis

On Tue, Jan 25, 2011 at 5:08 PM, Hongying Li <colorleaf@hotmail.com>
wrote:
>
> Dear all,
> I always encounter a crash when running hazard.ratio.plot from rms package
> with my predictor as a factor.
> It works fine when the predictor is a continous score.
> Anyone encounters this too? Is this a bug or something?
> Thanks,
> Lilian
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
	[[alternative HTML version deleted]]