[R] offset

[Prof Brian Ripley]

On Wed, 29 Nov 2000, E.A.Catchpole wrote:

> I would like to do a logistic multiple regression on a binary variate,
> with what Genstat calls an offset, ie a regression variable with the
> coefficient constrained=1. I'm far from home and have Splus but not R
> here, but any information from either source would be very welcome. I'd
> hate to have to go back to using Genstat . . .

Use offset() in the formula to glm.  In R only, you can also specify
offset as a parameter to glm: there are examples on ?glm in R (I know, I
added them).

> 
> Thanks,
> 	Ted.
> ---------------
> Dr E.A. (Ted) Catchpole			
> School of Maths & Stats	
> University College, UNSW		Institute of Maths & Stats      
> Australian Defence Force Academy	University of Kent at Canterbury
> e-catchpole at adfa.edu.au			Canterbury, CT2 7NF, England
> http://www.ma.adfa.edu.au/~eac		E.A.Catchpole at ukc.ac.uk
> 
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-- 
Brian D. Ripley,                  ripley at 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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