Hi, On Fri, Sep 10, 2010 at 4:05 AM, omerle <ome...@laposte.net> wrote: > Hi, > > I got two questions : > > 1st Question > a="S" > b=data.frame(S=3) > do.call(`<-`,list(do.call(`$`,list(b,"S")),5))
I think there is some confusion here. Why are you setting a equal to "S" but then never using it? > => How can I put new values on S column having the column name as a variable ? I'm having trouble parsing this. What exactly do you want to do? > > 2 nd Question > a="S" > b=data.frame(S=3) > b[,"S"]=list(1:10) #Doesnt works > b$S=list(1:10) #Works > => Isnt the same thing ? What is the difference between these two things ? I believe b[["S"]] is the same as b$S, b[,"S"] is different. But I have to question your assertion that b$S=list(1:10) "Works". This is a very odd construction (putting a list as an element of a data.frame) and is almost certainly not what you want. > > > Thanks, > > Une messagerie gratuite, garantie à vie et des services en plus, ça vous > tente ? > Je crée ma boîte mail www.laposte.net > > [[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. > > -- Ista Zahn Graduate student University of Rochester Department of Clinical and Social Psychology http://yourpsyche.org ______________________________________________ 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.