From ggrothend|eck @end|ng |rom gm@||@com  Sat Oct 12 00:35:27 2019
From: ggrothend|eck @end|ng |rom gm@||@com (Gabor Grothendieck)
Date: Fri, 11 Oct 2019 18:35:27 -0400
Subject: [Rd] New matrix function
In-Reply-To: <65fd0c92-3711-cb7e-09cf-35f9896663b8@fredhutch.org>
References: <CAL0QV_OHN1+c2ZMO28v9gB1Y-0c+2zL57bDCgcZse13bZ8--eQ@mail.gmail.com>
 <65fd0c92-3711-cb7e-09cf-35f9896663b8@fredhutch.org>
Message-ID: <CAP01uRkmkD+yrZVwAtgR-ZcvVbGHXmtf4cU5-mA4+31-zV8Xzg@mail.gmail.com>

The link you posted used the same inputs as in my example. If that is
not what you meant maybe
a different example is needed.
Regards.

On Fri, Oct 11, 2019 at 2:39 PM Pages, Herve <hpages at fredhutch.org> wrote:
>
> Has someone looked into the image processing area for this? That sounds
> a little bit too high-level for base R to me (and I would be surprised
> if any mainstream programming language had this kind of functionality
> built-in).
>
> H.
>
> On 10/11/19 03:44, 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://urldefense.proofpoint.com/v2/url?u=https-3A__www.mathworks.com_matlabcentral_answers_194708-2Dindex-2Da-2Dsmall-2Dmatrix-2Din-2Da-2Dlarger-2Dmatrix&d=DwICAg&c=eRAMFD45gAfqt84VtBcfhQ&r=BK7q3XeAvimeWdGbWY_wJYbW0WYiZvSXAJJKaaPhzWA&m=v96tqHMO3CLNBS7KTmdshM371i6W_v8_2H5bdVy_KHo&s=9Eu0WySIEzrWuYXFhwhHETpZQzi6hHLd84DZsbZsXYY&e=
> >
> > 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://urldefense.proofpoint.com/v2/url?u=https-3A__coolbutuseless.github.io_2018_04_03_finding-2Da-2Dlength-2Dn-2Dneedle-2Din-2Da-2Dhaystack_&d=DwICAg&c=eRAMFD45gAfqt84VtBcfhQ&r=BK7q3XeAvimeWdGbWY_wJYbW0WYiZvSXAJJKaaPhzWA&m=v96tqHMO3CLNBS7KTmdshM371i6W_v8_2H5bdVy_KHo&s=qZ3SJ8t8zEDA-em4WT7gBmN66qvvCKKKXRJunoF6P3k&e=
> >
> > 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.
> >
> > Thank you
> > Best regards,
> > Morgan
> >
> >       [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-devel at r-project.org mailing list
> > https://urldefense.proofpoint.com/v2/url?u=https-3A__stat.ethz.ch_mailman_listinfo_r-2Ddevel&d=DwICAg&c=eRAMFD45gAfqt84VtBcfhQ&r=BK7q3XeAvimeWdGbWY_wJYbW0WYiZvSXAJJKaaPhzWA&m=v96tqHMO3CLNBS7KTmdshM371i6W_v8_2H5bdVy_KHo&s=tyVSs9EYVBd_dmVm1LSC23GhUzbBv8ULvtsveo-COoU&e=
> >
>
> --
> Herv? Pag?s
>
> Program in Computational Biology
> Division of Public Health Sciences
> Fred Hutchinson Cancer Research Center
> 1100 Fairview Ave. N, M1-B514
> P.O. Box 19024
> Seattle, WA 98109-1024
>
> E-mail: hpages at fredhutch.org
> Phone:  (206) 667-5791
> Fax:    (206) 667-1319
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel



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[Rd] New matrix function
Gabor Grothendieck