Dear R users, I am currently attempting to fit logistic regression models in R, where the slopes should be restricted to positive values. Although I am aware of the package nnls (which does the trick for linear regression models), I did not find any solution for logistic regression. If there is any package available for this purpose, I would be interested to know them.
Alternatively, I realize it is possible to optimize a specialized likelihood function that does the trick. Although I know how to optimize the log-likelihood of logistic regression models, I am not sure how to implement non-negativity constraints for slope parameters without messing up the Newton optimization. Therefore, I am also interested in solutions for this problem. Best regards, Thomas Debray ______________________________________________ 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.
