[R] glm fit with no intercept

[Göran Broström]

On Fri, Jan 07, 2005 at 05:14:29PM +0100, Peter Dalgaard wrote:
> "Gudrun Jonasdottir" <gudrunj at math.su.se> writes:
> 
> > Dear R-help list members,
> > 
> > I am currently trying to fit a generalized linear model using a binomial
> > with the canonical link. The usual solution is to use the R function glm()
> > in the package "stats". However, I run into problem when I want to fit a
> > glm without an intercept. It is indicated that the solution is in changing
> > the function glm.fit (also in "stats"), by specifying intercept=FALSE. I
> > have not been successful in getting any output though.
> > 
> > Any suggestion on how to fit a glm with no intercept?
> 
> Use -1 in the model formula.
> 
>   x <- sample(0:1,10,rep=T)
>   d <- runif(10)
>   summary(glm(x~d-1,family=binomial))
> 
> > "När inget annat hjälper, läs instruktionsboken."
> > - Canns axiom
> 
> .. i närvarande fall: "An Introduction to R", Ch.11.

.. i föreliggande fall: (or, .. i detta fall:) is better Swedish.
But maybe it was Danish:-). Anyway, I agree. 

HTH, Göran
> 
> -- 
>    O__  ---- Peter Dalgaard             Blegdamsvej 3  
>   c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
>  (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
> ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
> 
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-- 
 Göran Broström                    tel: +46 90 786 5223
 Department of Statistics          fax: +46 90 786 6614
 Umeå University                   http://www.stat.umu.se/egna/gb/
 SE-90187 Umeå, Sweden             e-mail: gb at stat.umu.se