You can use the lapply or rapply functions on the resulting list to break
each piece into a list itself, then apply the lapply or rapply function to
those resulting lists, ...
On Mon, Mar 11, 2013 at 3:41 PM, Not To Miss <not.to.m...@gmail.com> wrote:
> Thanks. That's just an simple example - what if there are more columns and
> more rows? Is there any easy way to create nested list?
>
> Best,
> Zech
>
>
> On Mon, Mar 11, 2013 at 2:12 PM, MacQueen, Don <macque...@llnl.gov> wrote:
>
> > You will have to decide what R data structure is a "tree structure". But
> > maybe this will get you started:
> >
> > > foo <- data.frame(x=c('A','A','B','B'), y=c('Ab','Ac','Ba','Bd'))
> > > split(foo$y, foo$x)
> > $A
> > [1] "Ab" "Ac"
> >
> > $B
> > [1] "Ba" "Bd"
> >
> > I suppose it is at least a little bit tree-like.
> >
> >
> > --
> > Don MacQueen
> >
> > Lawrence Livermore National Laboratory
> > 7000 East Ave., L-627
> > Livermore, CA 94550
> > 925-423-1062
> >
> >
> >
> >
> >
> > On 3/10/13 9:19 PM, "Not To Miss" <not.to.m...@gmail.com> wrote:
> >
> > >I have a data.frame object like:
> > >
> > >> data.frame(x=c('A','A','B','B'), y=c('Ab','Ac','Ba','Bd'))
> > > x y
> > >1 A Ab
> > >2 A Ac
> > >3 B Ba
> > >4 B Bd
> > >
> > >how could I create a tree structure object like this:
> > > |---Ab
> > > A---|
> > >_| |---Ac
> > > |
> > > | |---Ba
> > > B---|
> > > |---Bb
> > >
> > >Thanks,
> > >Zech
> > >
> > > [[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.
> >
> >
>
> [[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.
>
--
Gregory (Greg) L. Snow Ph.D.
538...@gmail.com
[[alternative HTML version deleted]]
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