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I have some code (that I did not write) that has many unused local variables in Modules. I would like to clean this up. Is there any automated way to do this or to make it more clear that a local variable is unused (it would be great if it could be highlighted in a different color for example)?

I am using the standard notebook environment. Is it possible within that? Or should I be using something else like Workbench for this?

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    $\begingroup$ As of version 12.3, you can use the interactive analyzer, in the Menu bar, Evaluation > Analyze Cell or Analyze Notebook. $\endgroup$
    – Ben Izd
    Commented Jun 10, 2021 at 16:57

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Wolfram Workbench is nice for this, but you could also try the "CodeInspector`" package: enter image description here

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  • $\begingroup$ Nice. +1. I think it should say a is uninitialized, but it what the OP asked. $\endgroup$
    – Michael E2
    Commented Jun 10, 2021 at 16:51
  • $\begingroup$ Thanks! This looks great! Is there an easy way to refer to a certain input cell instead of having to convert it to a string by hand? Say if In[2] in the above had contained Module[{a,b,c},a+1]. Or alternatively if we want to check if CodeInspectSummarize[#, CodeInspect[#]] &@"Module[{a,b,c},a+1]" contains any unreferenced variables by applying the CodeInspector to the (unevaluated) In[3]. (In the latter case I would expect the answer to be no since the Module is within a string.) $\endgroup$
    – Kvothe
    Commented Jun 10, 2021 at 17:04
  • $\begingroup$ @Kvothe you could save your notebook as a package or use NotebookRead, but I would really use Workbench. I once wrote a installation script, not sure if it still works on all operating systems: mathematica.stackexchange.com/a/225038/29 $\endgroup$
    – Rolf Mertig
    Commented Jun 10, 2021 at 17:46
  • $\begingroup$ This is in product v12.3 $\endgroup$
    – user5601
    Commented Jun 10, 2021 at 21:40
  • $\begingroup$ @RolfMertig, would you mind adding an answer using the Workbench in that case. I already installed it (Eclipse + Plugin) following support.wolfram.com/27221. I simply dragged and dropped a .m file into it where I would like to find the unreferenced local variables. I don't know what to do next. (Edit: Sorry I think I figured it out.) $\endgroup$
    – Kvothe
    Commented Jun 11, 2021 at 8:25

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