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

[Eric Berger]

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.