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
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