[R] Is there a sexy way ...?

[Mark Leeds]

Rolf can tell us for sure but I thought the goal was to use v ?
Maybe not ? Either way, I think Bert wins for shortest and Kimmo
wins for longest.  IMHO, elegance is in the eye of the
beholder.






On Fri, Sep 27, 2024 at 4:35 AM Stephen Berman via R-help <
r-help using r-project.org> wrote:

> Yet another way (not as sexy as Deepayan's):
>
> as.vector(t(sapply(x, c)))
>
> Steve Berman
>
> On Fri, 27 Sep 2024 10:45:06 +0300 Eric Berger <ericjberger using gmail.com>
> wrote:
>
> > v <- as.numeric(matrix(unlist(x),ncol=5,byrow=TRUE))
> > v
> >  [1]  7  2  6 13  5  9  1 14 15  4  8 12 10 11  3
> >
> > On Fri, Sep 27, 2024 at 8:33 AM Deepayan Sarkar
> > <deepayan.sarkar using gmail.com> wrote:
> >>
> >> > unsplit(x, f)
> >>  [1]  7  2  6 13  5  9  1 14 15  4  8 12 10 11  3
> >>
> >> Is more general (works if the subgroups are imbalanced), and hopefully
> more
> >> sexy as well :-)
> >>
> >> Best,
> >> -Deepayan
> >>
> >>
> >> On Fri, 27 Sept 2024 at 10:11, Bert Gunter <bgunter.4567 using gmail.com>
> wrote:
> >>
> >> > ... And, in fact, I just realized that
> >> >
> >> > c(do.call(rbind, x))
> >> >
> >> > is even better.
> >> >
> >> > -- Bert
> >> >
> >> >
> >> > On Thu, Sep 26, 2024 at 9:26 PM Bert Gunter <bgunter.4567 using gmail.com>
> >> > wrote:
> >> >
> >> > > Sorry, hit send by accident.
> >> > > The 2-line version is:
> >> > >
> >> > > x <- do.call(rbind, x)
> >> > > dim(x) <- NULL
> >> > >
> >> > > Cheers,
> >> > > Bert
> >> > >
> >> > > On Thu, Sep 26, 2024 at 9:23 PM Bert Gunter <bgunter.4567 using gmail.com
> >
> >> > > wrote:
> >> > >
> >> > >> How about:
> >> > >> as.vector(do.call(rbind,x))
> >> > >>
> >> > >> Cheers,
> >> > >> Bert
> >> > >>
> >> > >>
> >> > >>
> >> > >>
> >> > >> However, I much prefer a 2 line version:
> >> > >>
> >> > >> On Thu, Sep 26, 2024 at 8:56 PM Rolf Turner <rolfturner using posteo.net
> >
> >> > >> wrote:
> >> > >>
> >> > >>>
> >> > >>> I have (toy example):
> >> > >>>
> >> > >>> x <- list(`1` = c(7, 13, 1, 4, 10),
> >> > >>>           `2` = c(2, 5,  14, 8, 11),
> >> > >>>           `3` = c(6, 9, 15, 12, 3))
> >> > >>> and
> >> > >>>
> >> > >>> f <- factor(rep(1:3,5))
> >> > >>>
> >> > >>> I want to create a vector v of length 15 such that the entries of
> v,
> >> > >>> corresponding to level l of f are the entries of x[[l]].  I.e. I
> want
> >> > >>> v to equal
> >> > >>>
> >> > >>>     c(7, 2, 6, 13, 5, 9, 1, 14, 15, 4, 8, 12, 10, 11, 3)
> >> > >>>
> >> > >>> I can create v "easily enough", using say, a for-loop.  It seems
> to me,
> >> > >>> though, that there should be sexier (single command) way of
> achieving
> >> > >>> the desired result.  However I cannot devise one.
> >> > >>>
> >> > >>> Can anyone point me in the right direction?  Thanks.
> >> > >>>
> >> > >>> cheers,
> >> > >>>
> >> > >>> Rolf Turner
> >> > >>>
> >> > >>> --
> >> > >>> Honorary Research Fellow
> >> > >>> Department of Statistics
> >> > >>> University of Auckland
> >> > >>> Stats. Dep't. (secretaries) phone:
> >> > >>>          +64-9-373-7599 ext. 89622
> >> > >>> Home phone: +64-9-480-4619
> >> > >>>
> >> > >>> ______________________________________________
> >> > >>> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >> > >>> https://stat.ethz.ch/mailman/listinfo/r-help
> >> > >>> PLEASE do read the posting guide
> >> > >>> https://www.R-project.org/posting-guide.html
> >> > >>> and provide commented, minimal, self-contained, reproducible code.
> >> > >>>
> >> > >>
> >> >
> >> >         [[alternative HTML version deleted]]
> >> >
> >> > ______________________________________________
> >> > R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >> > https://stat.ethz.ch/mailman/listinfo/r-help
> >> > PLEASE do read the posting guide
> >> > https://www.R-project.org/posting-guide.html
> >> > and provide commented, minimal, self-contained, reproducible code.
> >> >
> >>
> >>         [[alternative HTML version deleted]]
> >>
> >> ______________________________________________
> >> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >> https://stat.ethz.ch/mailman/listinfo/r-help
> >> PLEASE do read the posting guide
> https://www.R-project.org/posting-guide.html
> >> and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> https://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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