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

Michael Hannon jmhannon.ucdavis at gmail.com
Wed Nov 15 10:44:09 CET 2017

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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