[Rd] glm start/offset bugs (PR#1422)

[ripley@stats.ox.ac.uk]

On Fri, 29 Mar 2002, Brett Presnell wrote:

>
> Prof Brian D Ripley writes:
> >
> > Yes, thought has been given, and the code has been looked at. (People
> > do look at R code you know, even if they don't jump in to change it
> > after a few hour's use.)
>
> Sorry. No insult intended.
>
> > Given the time pressures, this is not going to get looked at for
> > 1.5.0.
>
> Does this mean that my patch will not make it in either?  Berwin's

Probably not.  People seem very reluctant to deal with bugs these days.

> work is obviously more complicated and requires more attention and
> careful reading to check.  My changes actually only have an effect if
> both an offset and a starting value are given, and clearly the current
> version falls down badly in that case anyway.
>
> > I have long thought that given the history of problems maintaining
> > glm() that it might be easier to rewrite it for scratch.  Having
> > .null versions serves no useful purpose, for example.
>
> Yes, having ploughed around in the code a bit, I'm very sympathetic to
> this view.

-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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