[Rd] New matrix function

[Spencer Graves]

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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