[R] error message when plotting survival curves

[Thomas Lumley]

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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>
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Thomas Lumley			Assoc. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle