<span class="co">#&gt; 3    Month  0.000000</span>
<span class="co">#&gt; 4      Day  0.000000</span>
<span class="co">#&gt; 5  Solar.R  4.575163</span>
<span class="co">#&gt; 6    Ozone 24.183007</span></code></pre></div>
</div>
<div class="section level2">
<h2 id="recoding-as-na">Recoding as NA<a class="anchor" aria-label="anchor" href="#recoding-as-na"></a>
</h2>
<ul>
<li><code>recode_as_na</code></li>
</ul>
<p>As the name might imply, this converts any value or vector of values to <code>NA</code> i.e. 