[R] System crash when using surv=T in cph
Frank E Harrell Jr
f.harrell at vanderbilt.edu
Fri May 22 15:31:30 CEST 2009
> 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)
> As soon as I press enter, Windows XP crashes. If I remove surv=T, then it
> works. I have R version 2.9.0.
> 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
Until Design is updated (which will be very soon)
anova is not supposed to display parameter estimates. For one thing,
there is often more than one parameter associated with a term in the
model. Use summary(fit) to get hazard ratios for sensible covariate ranges.
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University
More information about the R-help