[R] Is there a tool to find unused functions?

[Alexander Engelhardt]

Thanks, that helps! The visualization is very messy, because I have 
about 100 functions, but foodweb() returns a matrix of which function 
calls which, and the functions callers.of("myfunc") and 
callees.of("myfunc") do exactly what I was looking for.

  - Alex


On 11/15/2017 10:44 AM, Michael Hannon wrote:
> mvbutils::foodweb produces a graphical display of the hierarchy (or
> network or ...) of function calls.  Isolated functions are not called.
> This might help you.
>
> -- Mike
>
>
> On Wed, Nov 15, 2017 at 12:44 AM, Alexander Engelhardt
> <alex at chaotic-neutral.de> wrote:
>> I've inherited a large R codebase which has grown over a few years and a few
>> different developers.
>>
>> It contains many things I'd like to delete:
>> - Unused functions
>> - Variable definitions that are never called
>> - Unreachable code
>>
>> I'd write that myself, it would even be fun, but I don't want to reinvent
>> the wheel.
>> Is there an R package that can find these things?
>>
>> I've heard of lintr, but I'm not sure if it's the right tool, since,
>> unfortunately, the code is in a folder (not a package) with many R files
>> that are sourced from one master file and lintr can only check a single file
>> or an actual package, from what I understand. A workaround of course would
>> be to concatenate all files into one R script.
>>
>> I'd appreciate any hints on how to best solve this.
>>
>> Thanks in advance,
>> Alex
>>
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> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.