[R] logistic regression without intercept
Peter Dalgaard BSA
p.dalgaard at biostat.ku.dk
Wed Aug 20 16:14:51 CEST 2003
Ross Boylan <ross at biostat.ucsf.edu> writes:
> Thanks to Thomas Lumley, Spencer Graves, and Steve Sullivan for their
> advice on and off list to modify the formula with +0 (which I did; it
> worked) or -1 at the end.
> > > Also, I noticed that S-Plus but not R has a glim routine that uses
> > > maximum likelihood. What would be the equivalent?
> > glm.
> I thought glm was a minimize the deviations approach, which is different
> from maximize likelihood.
It minimizes deviance, which is a constant minus twice the
log-likelihood.... I.e. it's equivalent to ML (unless you want to
quibble about bias-corrected scale parameter estimation in the
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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