title: What is "The R Interpreter" setting in IntelliJ IDEA?
body: <p>My OS is Windows 7. I have installed "IntelliJ IDEA 2016.2.5", and "R x64 3.1.2".</p>
  
  <p>I'm going to do some R language coding in IntelliJ IDEA. So I installed the plugin "IntelliJ plugin for the R language". Then I'm blocked by its setting, at File->Settings->Other Settings->The R Interpreter.</p>
  
  <p>I have no idea of what is "R Interpreter". Which file is it? </p>