jeffxu at live.com
Thu Feb 26 17:20:10 CET 2009
Thanks very much, Bernhard and Terry.
It clarify my confusion and really helps a lot.
Terry Therneau wrote:
>> plot(survfit(fit)) should plot the survival-function for x=0 or
>> equivalently beta'=0. This curve is independent of any covariates.
> This is not correct. It plots the curve for a hypothetical subject with
> mean of each covariate.
> This is NOT the "average survival" of the data set. Imagine a cohort
> made up
> of 60 year old men and their 10 year old grandsons: the expected survival
> this cohort does not look that for a 35 year old male.
> Terry T
> R-help at r-project.org mailing list
> PLEASE do read the posting guide
> and provide commented, minimal, self-contained, reproducible code.
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