title: How to view/change the installation of R that RStudio uses?
body: <p>After installing either anaconda or jupyter, RStudio now shows some logs when installing packages, which indicate it's using R installed by <em>anaconda</em>, rather than the <em>original</em> version I had installed. </p>
  
  <p>This is not a problem, until I try to install various packages, and I get some maze of frustrating c++ issues (due to graph dependencies). </p>
  
  <h3>What I've tried so far</h3>
  
  <ul>
  <li>Changed <code>.libPaths()</code> from the anaconda path to the default locations (but this doesn't help for R, only for R libraries)</li>
  </ul>
  
  <h3>Question</h3>
  
  <p>How can I tell which R installation RStudio is using, and how do I change it (from the anaconda version, back to the vanilla R version I previously had installed)</p>