>fix_missing &lt;-<span class="st"> </span><span class="cf">function</span>(x) { <span class="co"># INPUT</span></span>
<span id="cb26-3"><a href="Intro.html#cb26-3"></a>  x[x <span class="op">==</span><span class="st"> </span><span class="dv">-99</span>] &lt;-<span class="st"> </span><span class="ot">NA</span> <span class="co"># COMPUTATION</span></span>
<span id="cb26-4"><a href="Intro.html#cb26-4"></a>  x <span class="co"># OUTPUT </span></span>
<span id="cb26-5"><a href="Intro.html#cb26-5"></a>}</span>
