h roxygen2 and also makes its usage more transparent: it is now clear to users what data is required to create a visualisation, and they are free to use dataframes of their choice.</p>
<div class="sourceCode" id="cb191"><pre class="sourceCode r"><code class="sourceCode r"><a class="sourceLine" id="cb191-1" title="1"><span class="co"># mock up data</span></a>
<a class="sourceLine" id="cb191-2" title="2">countries &lt;-<span class="st"> </span><span class="kw">c</span>(<span class="st">&quot;US&quot;</span>, 