Roger: 1. Constrain how? Via a penalty? Via a linear or nonlinear equations or inequalities on the coefficients? You need to be explicit.
2. The above point and: I started with the example, but I think my data is more Gaussian than > binomial. This returns the following errors. > -- > both indicate to me that your math/statistical skills may be inadequate for the task. As a result, I think you would do well to consult a local statistician -- or someone with adequate statistical background in this area,anyway. Good people on this list may offer advice, but you may be heading down the wrong path and thereby committing errors of the third kind (right answer to wrong question). Cheers, Bert "Men by nature long to get on to the ultimate truths, and will often be impatient with elementary studies or fight shy of them. If it were possible to reach the ultimate truths without the elementary studies usually prefixed to them, these would not be preparatory studies but superfluous diversions." -- Maimonides (1135-1204) Bert Gunter Genentech Nonclinical Biostatistics 467-7374 http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm [[alternative HTML version deleted]] ______________________________________________ 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.
