> * R. Michael Weylandt <zvpunry.jrlyn...@tznvy.pbz> [2012-10-18 16:01:37 > +0100]: > > On Thursday, October 18, 2012, Sam Steingold wrote: > >> > * Bert Gunter <thagre.ore...@trar.pbz> [2012-10-17 23:21:44 -0700]: >> > >> > However, Is level "5" in 'a' the same as level "5" in 'b' ? >> >> yes, of course. >> would anyone want to _different_ factors with identical string >> representations?! > > Off the cuff, studying education and grades: F could be a grade or a > gender.
would you ever want to concatenate a vector of grades with a vector of genders? as I said elsewhere, the function which concatenates factors must check that the levels are identical before proceeding. -- Sam Steingold (http://sds.podval.org/) on Ubuntu 12.04 (precise) X 11.0.11103000 http://www.childpsy.net/ http://pmw.org.il http://camera.org http://openvotingconsortium.org http://truepeace.org http://jihadwatch.org Ernqvat guvf ivbyngrf QZPN. ______________________________________________ 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.
