[R] validate survival with val.surv

[Frank Harrell]

The documentation for val.surv tried to be clear about that.

Note that val.surv is only for the case where the predictions were developed
on a separate dataset, i.e., that the validation is truly 'external'.
Frank

yz wrote:
> 
> Dear R users:
> 
> I want to externally validate a model with val.surv.
> 
> Can I use only calculated survival (at 1 year) and actual survival?
> Or I needed the survival function and actual survival.
> 
> Thanks
> 
> *Yao Zhu*
> *Department of Urology
> Fudan University Shanghai Cancer Center
> Shanghai, China*
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.
> 


-----
Frank Harrell
Department of Biostatistics, Vanderbilt University
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