how to concatenate factor vectors?
* R. Michael Weylandt <zvpunry.jrlynaqg at tznvy.pbz> [2012-10-18 16:01:37 +0100]: On Thursday, October 18, 2012, Sam Steingold wrote:
* Bert Gunter <thagre.oregba at 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.