sigalit mangut-leiba wrote: > Hello, > I want to calculate Odds Ratio. > I have a binary outcome and two groups of exposure: '1' are exposed, and > '2' are not-exposed. > I want '2' to be the reference group. > By "factor" I get group '1' as a reference because it sorted in increasing > order. > How do I change it?
See ?factor and learn to use the "levels" argument of factor(). Uwe Ligges > Thank you, > Sigalit. > > [[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. ______________________________________________ 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.
