M&gt;<br>
    matrix_column&lt;M&gt; column (M &amp;data, std::size_t j);<br>
    template&lt;class M&gt;<br>
    const matrix_column&lt;const M&gt; column (const M &amp;data, std::size_t j);</code>
</pre>

<h4>Description</h4>

<p>The free <code>column</code> functions support the construction
of matrix columns.</p>

<h4>Definition</h4>

<p>Defined in the header matrix_proxy.hpp.</p>

<h4>Type requirements</h4>

<ul>
<li><code>M</code> is a model of <a href=
"expression.htm#matrix_expression">Matrix Expres