Hi, I would like to know the criteria by which R removes a factor in linear models. For example, I have a four level factor, and R creates 3 dummies to estimate coefficients. Which level is chosen? Can I chance it? Thanks, Iuri
[[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.