[R] Brier's score for bootstrap sample (coxph)

[Frank E Harrell Jr]

paaventhan jeyaganth wrote:
> Dear all,
> 
> How can i get brier's score for the bootsrap sample for survival analysis.
> 
> this are the code i am using for the validation.
> 
>  
> 
> f1 <- cph(Surv(time,dead ) ~ strata(x1)+strata(x2)+strata(x3), 
> x=TRUE, y=TRUE, surv=TRUE, time.inc=12, data=new)
> 
>  
> 
> validate(f1,B=200,u=12,dxy=T)
> 
>  
> 
>  
> 
> Thanks
> 
> Paaveen
>  		

You did not following the posting guide.

You mixed two package; the functions you used did not match the subject 
line of your e-mail.

You are attempting to validate a model containing no covariates, which 
is not impossible but will be noisy.

You did not point to a function or package that claims to be able to 
compute a Brier score with censored data.

Frank
  	

-- 
Frank E Harrell Jr   Professor and Chairman        School of Medicine
                      Department of Biostatistics   Vanderbilt University