ass="st">"a"</span>)</a>
<a class="sourceLine" id="cb19-5" title="5"><span class="co"># Error: non-numeric argument to mathematical function</span></a></code></pre></div>
</div>
<div id="with_message-and-with_warning" class="section level3">
<h3 class="hasAnchor">
<a href="#with_message-and-with_warning" class="anchor"></a><code><a href="reference/messagefunctions.html">with_message()</a></code> and <code><a href="reference/messagefunctions.html">with_warning()</a></code>
</h3>
<p>These two functions take a