[Rd] New matrix function

[Wang Jiefei]

Hi Morgan,

I think there is a discussion on how developers include a function in base
R in another thread:

https://stat.ethz.ch/pipermail/r-devel/2019-October/078551.html


Best,
Jiefei

On Fri, Oct 11, 2019 at 8:19 AM Morgan Morgan <morgan.emailbox using gmail.com>
wrote:

> On Fri, 11 Oct 2019 10:45 Duncan Murdoch, <murdoch.duncan using gmail.com>
> wrote:
>
> > On 11/10/2019 6:44 a.m., Morgan Morgan wrote:
> > > Hi All,
> > >
> > > I was looking for a function to find a small matrix inside a larger
> > matrix
> > > in R similar to the one described in the following link:
> > >
> > >
> >
> https://www.mathworks.com/matlabcentral/answers/194708-index-a-small-matrix-in-a-larger-matrix
> > >
> > > I couldn't find anything.
> > >
> > > The above function can be seen as a "generalisation" of the "which"
> > > function as well as the function described in the following post:
> > >
> > >
> >
> https://coolbutuseless.github.io/2018/04/03/finding-a-length-n-needle-in-a-haystack/
> > >
> > > Would be possible to add such a function to base R?
> > >
> > > I am happy to work with someone from the R core team (if you wish) and
> > > suggest an implementation in C.
> >
> > That seems like it would sometimes be a useful function, and maybe
> > someone will point out a package that already contains it.  But if not,
> > why would it belong in base R?
> >
>
> If someone already implemented it, that would great indeed. I think it is a
> very general and basic function, hence base R could be a good place for it?
>
> But this is probably not a good reason; maybe someone from the R core team
> can shed some light on how they decide whether or not to include a function
> in base R?
>
>
> > Duncan Murdoch
> >
>
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