"><code class="sourceCode r"><span id="cb2-1"><a href="#cb2-1" tabindex="-1"></a><span class="do">## GitHub</span></span>
<span id="cb2-2"><a href="#cb2-2" tabindex="-1"></a><span class="cf">if</span> (<span class="sc">!</span><span class="fu">require</span>(devtools, <span class="at">quietly =</span> <span class="cn">TRUE</span>)) <span class="fu">install.packages</span>(<span class="st">"devtools"</span>)</span>
<span id="cb2-3"><a href="#cb2-3" tabindex="-1"></a><span class="fu">library</span>(<span clas