[R] survreg's algorithm

Gad Abraham g.abraham at ms.unimelb.edu.au
Tue Oct 16 05:12:43 CEST 2007

Gad Abraham wrote:
> Hi,
> I'm using survreg() from the survival package for parametric survival 
> regression (modelling inter-arrival times of patients to a waiting list 
> as exponentially distributed, with various regressors such as queue size 
> and season).
> Does anyone know which algorithm survreg() uses for this?
> Thanks,
> Gad

Due diligence:

I have actually looked at ?survreg and friends, and at the source code; 
except for a brief mention of a "sparse Newton-Rapshon algorithm" in the 
frailty model code, I couldn't find anything substantive.

Gad Abraham
Department of Mathematics and Statistics
The University of Melbourne
Parkville 3010, Victoria, Australia
email: g.abraham at ms.unimelb.edu.au
web: http://www.ms.unimelb.edu.au/~gabraham

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