[R] problem with logistic regression

[Joe Nocera]

CATMOD in SAS builds log-linear glms.  If you are truly trying to create logistic
regressions in SAS, use PROC LOGISTIC instead.  If you really meant that you are trying
to create log-linear models in R - then look up the usage of the function loglin (e.g.
loglin())

Cheers,
Joe

Quoting Helene.Dryssens at eleves.polytech-lille.fr:

> Hi,
> 
> we try to do a logistic regression with the function glm.
> But we notice that this function don't give the same results as the SAS proc
> catmod (differents estimate given).
> We try to change the contrast on R system with:
> > options(contrasts=c(unordered="contr.SAS",ordered="contr.poly"))
> 
> We also try with brlr and logistf functions.
> Unfortunately, the estimate aren't still the same.
> 
> Please could someone help us.
> 
> Thank you
> 
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Joseph J. Nocera
Ph.D. Candidate
NB Coop. Fish & Wildlife Research Unit
Biology Department - Univ. New Brunswick
Fredericton, NB
Canada   E3B 6E1
tel: (902) 679-5733

"Why does it have to be spiders?  Why can't it be 'follow the butterflies'"?!
    - Ron Weasley, Harry Potter & The Chamber of Secrets