I've a set of data to run a GLM on and am having trouble defining the categorical variables. For example, one of my variables is Year (ie. 1998, 1999). How do I define those years as factors/categorical variables? Cheers, Tim [[alternative HTML version deleted]]
look at ?factor ?formula ?data.frame I hope it helps. Best, Dimitris ---- Dimitris Rizopoulos Ph.D. Student Biostatistical Centre School of Public Health Catholic University of Leuven Address: Kapucijnenvoer 35, Leuven, Belgium Tel: +32/(0)16/336899 Fax: +32/(0)16/337015 Web: med.kuleuven.be/biostat student.kuleuven.be/~m0390867/dimitris.htm Quoting Tim Sippel <tsippel at gmail.com>:> I've a set of data to run a GLM on and am having trouble defining the > categorical variables. For example, one of my variables is Year (ie. 1998, > 1999). How do I define those years as factors/categorical variables? > > Cheers, > > Tim > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > >Disclaimer: kuleuven.be/cwis/email_disclaimer.htm