If b1+b2+b3 = 0 can't you put b3 = -b1-b2 and re-write the model in terms of b1 and b2 alone? The model is stil (g)linear.
If the parameters to which you refer corresponds to the levels of a factor, then you can use the contr.sum contrast matrices. It essentailly does the above. -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of m...@students.unibe.ch Sent: Wednesday, 20 October 2010 10:35 AM To: r-help@r-project.org Subject: [R] glm with linear restrictions I'm looking for a function or package to estimate a glm with linear restrictions (e.g. the sum of some parameters needs to be zero). I found the function orlm in the package ic.infer which works for lm models, but I need it for glm. Thanks, Markus ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
