Hi, I knew about that way already, with factor(). Isn't there another possibility, directly at the subsetting step? That would be of great help iris1 <- iris[iris$Species == 'setosa',] ## I mean here
Ivan Le 9/21/2010 15:14, David Winsemius a écrit : > > On Sep 21, 2010, at 9:04 AM, David Winsemius wrote: > >> >> On Sep 21, 2010, at 8:39 AM, pdb wrote: >> >>> >>> Thanks, but that was what I just discovered myself the hard way. >>> >>> What I really wanted to know was how to solve this issue. >> >> Although that was _not_ what you requested in your first post. >> >> 2 options: >> >> ?table >> >> ?factor >> >> iris1$Species <-factor(iris$Species) # removes "extraneous" levels > > And that was not what I meant to type. Meant for factor to be applied > to second dataframe.: > > iris1$Species <-factor(iris1$Species) # removes "extraneous" levels > > >> >>> -- > > David Winsemius, MD > West Hartford, CT > > ______________________________________________ > 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. > -- Ivan CALANDRA PhD Student University of Hamburg Biozentrum Grindel und Zoologisches Museum Abt. Säugetiere Martin-Luther-King-Platz 3 D-20146 Hamburg, GERMANY +49(0)40 42838 6231 ivan.calan...@uni-hamburg.de ********** http://www.for771.uni-bonn.de http://webapp5.rrz.uni-hamburg.de/mammals/eng/mitarbeiter.php [[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.
