Thank you for your answers. Problem solved. Eik's cue to all.names(match.call())[-1] was particularly enlightning!
Do > De : Eik Vettorazzi [mailto:e.vettora...@uke.uni-hamburg.de] > Envoyé : 17 août 2011 08:46 > À : Monsieur Do > Cc : r-help@r-project.org > Objet : Re: [R] Obtaining variable's names from a list of variables > > Hi, > there is no direct way, since > listVar <- list(age,sex) > creates a unnamed list, as can be seen by > names(listVar) #or > str(listVar) > > You can do sth like > listVar <- list(age=age,sex=sex) # or > listVar2 <- list(age,sex) > names(listVar2)<-c("age","sex") > > and afterwards access them using names(). > > Or you write your own list function using its call to name the returned object, > as in > > my.list<-function(...){ > tmp<-list(...) > names(tmp)<-all.names(match.call())[-1] > tmp > } > attach(iris) > a<-my.list(Sepal.Length,Sepal.Width) > > hth. > > Am 17.08.2011 08:46, schrieb Monsieur Do: > > Say I have a list of variables, > > > > listVar <- list(age,sex) > > > > I am looking for a way to either > > > > 1- create a vector c("age","sex") from it, or > > 2- get the names one by one in a for loop such as these > > > > a) for (i in 1:length(listVar)) rownames(result)[i] <- ??? > > > > b) for(i in listVar) print (variable's name) > > > > > > Any help much appreciated. > > [[alternative HTML version deleted]] > > > > > > > > > > ______________________________________________ > > R-help@r-project.orgmailing 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. > > -- > Eik Vettorazzi > Institut für Medizinische Biometrie und Epidemiologie Universitätsklinikum > Hamburg-Eppendorf > > Martinistr. 52 > 20246 Hamburg > > T ++49/40/7410-58243 > F ++49/40/7410-57790 ______________________________________________ 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.