we take a value such as “missing” or “NA” (not a real <code>NA</code> according to <code>R</code>) and convert it to R’s known handler for missing values (<code>NA</code>).</p>
<p>To use the function out of the box (with default arguments), one simply does something like:</p>
<div class="sourceCode" id="cb23"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span class="va">dummy_test</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/data.frame.html