t">"Apolitic"</span> <span class="op">=</span> <span class="st">"z"</span><span class="op">)</span>,</span>
<span>  na_values <span class="op">=</span> <span class="st">"z"</span></span>
<span><span class="op">)</span></span>
<span></span>
<span><span class="va">x6</span></span>
<span><span class="co">#&gt; &lt;declared&lt;character&gt;[20]&gt;</span></span>
<span><span class="co">#&gt;  [1]    b     c  NA(z)    b  NA(z) NA(z)    b     a     c  NA(z) NA(z)    b     b     c</span></span>
<span><span class="c