Prof Brian Ripley wrote:
> The survival package is a recommended package in R and contains survreg()
> which uses the AFT definitions for Weibull survival. This is well
> documented, and MASS (the book) has comparisons of PH and AFT
> parametrization for a Weibull example.
>
> I think you mean
The survival package is a recommended package in R and contains survreg()
which uses the AFT definitions for Weibull survival. This is well
documented, and MASS (the book) has comparisons of PH and AFT
parametrization for a Weibull example.
I think you mean Frank Harrell's `Design' package. A
Hi to all,
I am working on design package using survival function.
First using PSM and adopting a weibull specification for the baseline hazard ,
I have got the following results(since weibull has both PH and AFT propreties
,in addition I have used the PPHSm command):
Value Std. Error z
