check ?"[.factor", you need: fact[1:6, drop = TRUE]
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: http://med.kuleuven.be/biostat/ http://www.student.kuleuven.be/~m0390867/dimitris.htm ----- Original Message ----- From: "Afshartous, David" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, September 12, 2006 5:22 PM Subject: [R] levels of factor when subsetting the factor > > All, > > When I take a subset of a factor the reduced factor still maintains > all > the original levels of the factor when say forming the key in a > plot. > The data is correct, but the variable still "remembers" the original > levels. See below for reproducible code. Does anyone know how to > fix > this? > cheers, > dave > > fact = as.factor(c(rep("A", 3),rep("B", 3), rep("C", 3))) > new.fact = fact[1:6] >> new.fact > [1] A A A B B B > Levels: A B C ## should only show A B > > ______________________________________________ > [email protected] 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. > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ______________________________________________ [email protected] 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.
