[R] Cox Calibration regression test & double graphs

[David Winsemius]

A) Please do not highjack threads. Post new topics for new questions.

B) Calibration plots are very easy for either logistic regression or  
Cox models when using the calibrate function in either Harrell's rms  
or Design packages. (Not sure about how well they play with survfit  
objects, but you ought to be able to apply the same methods.)

-- 
David.

On Mar 9, 2010, at 12:52 PM, paaventhan jeyaganth wrote:

>
> Dear All,
>
> How can i do the bootstrap and calibration plot after surival analysis
>
> , i don't know how to do it after that please help me.
>
> Thanks
>
>
> here is my syntex
>
>
>
> library(survival)
> mfit <- survfit(Surv(days, status == 1)~drug, data = melanom)
>
>
>
> #how can i do the bootstra
>
> #Cox Calibration regression test
>
> #and the calibration plot
>
>
>
>
>
> paaveen
> 		 	   		
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David Winsemius, MD
West Hartford, CT