[R] System crash when using surv=T in cph

Uwe Ligges ligges at statistik.tu-dortmund.de
Fri May 22 12:06:58 CEST 2009

maxb wrote:
> Can someone help me. I am very new to R. I am fitting a Cox model using Frank
> Harrell's cph as I want to produce a Nomogram. This is what I have done:
> Srv<- Surv(time,cens)
> f.cox<- cph(Srv~ v1+v2+v3+v4, x=T, y=T, surv=T)

This is not reproducible for us. Where are the data?
What is cph? I presume the one from package Design?

> As soon as I press enter, Windows XP crashes. If I remove surv=T, then it
> works. I have R version 2.9.0.

Have you updates all your packages? Which versions of survival and 
Design are you using?
Is it really Windows that crashes, or just R?

to learn that even the newest version of Design produces WARNINGs.
If you can send reproducible code to let R crash, please send it to the 
package maintainer of the involved packages.

Uwe Ligges

> Is there a way of displaying the parameter estimates (ie beta coefficients)
> and HR when I type 
> anova(f.cox) as this only displays the Chi squared and p-values.
> Any help or advise drawing a Nomogram will be appreciated.
> Thanks in advance
> Max

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