On Mon, 20 Oct 2008, A Van Dyke wrote:


I am trying to plot survival curves using the following code as an example:

rs1799964.coxph<-(coxph(Surv(sassurvmonths,status)~age+stage+rs1799964_TNFA,method="efron"))

plot(rs1799964.coxph,lyt=c(1,3),xlab="Survival in Months",ylab="Proportion
Surviving")


You can't plot a coxph object. You probably want plot(survfit(rs1799965.copxh))

        -thomas


I am gettingthe following error message:


Error in xy.coords(x, y, xlabel, ylabel, log) :
 'x' and 'y' lengths differ


Any input to debugging this matter would be greatly appreciated.  Thank you
in advance.

-Alison
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Thomas Lumley                   Assoc. Professor, Biostatistics
[EMAIL PROTECTED]       University of Washington, Seattle

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