[R] Generate object names from variables

[Paul Johnson]

I collected some advice about this question a couple of  years ago.
This might help.

http://pj.freefaculty.org/R/Rtips.html#2.1 "Add variables to a data
frame (or list)"
and the next one after that.


On 7/14/06, Marc Schwartz (via MN) <mschwartz at mn.rr.com> wrote:
> On Fri, 2006-07-14 at 16:57 +0200, Georg Otto wrote:
> > Hi,
> >
> > I want to generate object names out of variables in a sort of variable
> > substitution.
> >
> > first i generate some vectors and an empty list:
> >
> > > vector.a<-c("a","b")
> > > vector.b<-c("c","d")
> > > vector.c<-c("e","f")
> > > vectors<-c("vector.a", "vector.b", "vector.c")
> > > vectors
> > [1] "vector.a" "vector.b" "vector.c"
> >
> > > vectorlist<-list()
> >
> > What I would then like to do is to generate elements of the list by
> > using variables, somehow like this (does not work):
> >
> > >for (i in vectors) {
> > + list$i<-i
> > + }
> >
> > To end up with a list like this:
> >
> > > list
> > $vector.a
> >  [1] "a" "b"
> > $vector.b
> >  [1] "c" "d"
> > $vector.c
> >  [1] "e" "f"
> >
> >
> > Any hint will be appreciated.
> >
> > Cheers,
> >
> > Georg
>

-- 
Paul E. Johnson
Professor, Political Science
1541 Lilac Lane, Room 504
University of Kansas