f="#cb21-3" aria-hidden="true" tabindex="-1"></a><span class="dt">row_vector</span>[<span class="dv">3</span>] rv;</span>
<span id="cb21-4"><a href="#cb21-4" aria-hidden="true" tabindex="-1"></a>rv = m[<span class="dv">4</span>, <span class="dv">3</span>:<span class="dv">5</span>];    <span class="co">// result is 1 x 3</span></span>
<span id="cb21-5"><a href="#cb21-5" aria-hidden="true" tabindex="-1"></a><span class="co">// ...</span></span>
<span id="cb21-6"><a href="#cb21-6" aria-hidden="true" tabindex="