title: How do I use tab completion in Rstudio
body: <p>I've been using Rstudio for a few weeks now, and the tab completion has worked inconsistently for me. For example:</p>
  
  <pre><code>my_variable = 10
  my_va
  </code></pre>
  
  <p>Those are the only two lines in my R-script. When I press tab to use completion, a small message appears next to the text bar saying "(No matches)", when I believe it should find the matching variable called "my_variable" in the line above.</p>
  
  <p>Does anyone know how to use tab completion in Rstudio?</p>