On 2019-10-11 04:45, Duncan Murdoch 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?
The natural thing could be to add it to another existing package.
A list of different search tools appear in the Wikiversity
article on "Searching R packages".[1] I especially like the "sos"
package, which includes a vignette, [2] but I also use RDocumentation
and occasionally Rseek. Google Advanced Search[3] is also very good;
I've used that for other things, but not searching for R packages.
I've had modest luck suggesting additions to other packages if I
write the function and documentation with good examples that tend to
ensure quality. Some maintainers reject my suggestions; other have
accepted them.
Spencer Graves
[1]
https://en.wikiversity.org/wiki/Searching_R_Packages
[2] Caveat: I wrote both that Wikiversity article and the "sos"
package, so I'm biased.
[3]
https://www.google.com/advanced_search
Duncan Murdoch
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