offsets again (PR#159)

[ripley@stats.ox.ac.uk]

On Wed, 7 Apr 1999 jlindsey@alpha.luc.ac.be wrote:

> 1. Try the following in 63.3
> 
> y <- rnorm(20)
> y1 <- y[2:20]
> y2 <- y[1:19]
> summary(glm(y1~offset(y2)))
> summary(glm(y1-y2~1))
> 
> Both are the same model, but the first gives the wrong s.e.
> I don't believe this was a problem in 63.2

My apologies: I have mis-edited the patch I applied, working too close
to the deadline for 0.64. I have in glm.fit

    residuals[good] <- z - (eta + offset)[good] # z does not have

Change + to - .

Oh well, 0.64.1 may get this right.

Brian

-- 
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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