-1"></a><span class="dt">vector</span>[<span class="dv">4</span>] v;</span>
<span id="cb21-7"><a href="#cb21-7" aria-hidden="true" tabindex="-1"></a>v = m[<span class="dv">2</span>:<span class="dv">5</span>, <span class="dv">3</span>];     <span class="co">// result is 3 x 1</span></span>
<span id="cb21-8"><a href="#cb21-8" aria-hidden="true" tabindex="-1"></a><span class="co">// ...</span></span>
<span id="cb21-9"><a href="#cb21-9" aria-hidden="true" tabindex="-1"></a><span class="dt">matrix</span>[<span c