
<span id="cb11-2"><a href="#cb11-2" tabindex="-1"></a>x <span class="ot">&lt;-</span> <span class="st">&quot;ABCDEF&quot;</span></span>
<span id="cb11-3"><a href="#cb11-3" tabindex="-1"></a><span class="fu">substr</span>(x, <span class="dv">1</span>, <span class="dv">3</span>) <span class="ot">&lt;-</span> <span class="st">&quot;x&quot;</span></span>
<span id="cb11-4"><a href="#cb11-4" tabindex="-1"></a>x</span>
<span id="cb11-5"><a href="#cb11-5" tabindex="-1"></a><span class="co">#&gt; [1] &quot;xBCDEF&q