Hi, This may help
a = c('one','two','three') data.frame(eval(substitute(rbind(var,2),list(var=a)))) ?substitute ?eval Weidong Gu On Sun, Mar 25, 2012 at 5:22 PM, Pedro Martinez <pedro.marti...@senckenberg.de> wrote: > hello, > I want to iterate through a list of names and use each element as an > argument in a function. For instance: > >> a = c('one','two','three') >> data= c() >> for(elem in a){data=cbind(elem = 2,data)} >> data > elem elem elem > [1,] 2 2 2 > > instead I want 'elem' to be substituted by the string in the list. Doing > it by hand would be: >> data = cbind('one'=2,data) >> data = cbind('two'=2,data) >> data = cbind('three'=2,data) >> data > 'one' 'two' 'three' > [1,] 2 2 2 > > I guess that the clue would be in sub(),gsub(), paste() or similar but I > didnt get it to work. > > I am comming from python were we woudl do something like: >> a = ['one','two','three'] >> data = {} > >> for elem in a: >> data[elem] = 2 > >> data > {'three': 2, 'two': 2, 'one': 2} > > Thanks, Pedro > > > - > Prof. Dr. P. Martinez Arbizu > DZMB-Forschungsinstitut Senckenberg > > Suedstrand 44 > D-26382 Wilhelmshaven > Germany > > Tel: +49 (0)4421 9475-100 > Fax: +49 (0)4421 9475-111 > > Email: pmarti...@senckenberg.de > > Senckenberg Gesellschaft für Naturforschung > Rechtsfähiger Verein gemäß § 22 BGB > Senckenberganlage 25 > 60325 Frankfurt > Direktorium: Prof. Dr. Dr. h.c. Volker Mosbrugger, Prof. Dr. Michael > Türkay, Dr. Johannes Heilmann, Prof. Dr. Pedro Martinez Arbizu, Prof. > Dr. Georg Zizka, Prof. Dr. Uwe Fritz > Vorsitzender des Präsidiums: Dietmar Schmid > Aufsichtsbehörde: Magistrat der Stadt Frankfurt am Main (Ordnungsamt) > > ______________________________________________ > 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. ______________________________________________ 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.