efore and it has been a
while since you worked on it, <a href="https://help.github.com/articles/merging-an-upstream-repository-into-your-fork/" class="external-link">pull
changes from the original repo</a> to your clone by using
<code>git pull upstream master</code>.</li>
<li>Open the RStudio project file (<code>.Rproj</code>).</li>
<li>Make your changes:
<ul><li>Write your code.</li>
<li>Test your code (bonus points for adding unit tests).</li>
<li>Document your code (see function documentation above).</li