ix</span>[<span class="dv">3</span>, <span class="dv">2</span>] a = <span class="fl">0.5</span> * (b + c);</span></code></pre></div>
<p>assigns the matrix variable <code>a</code> to half of the sum of <code>b</code> and <code>c</code>.
The only requirement on <code>b</code> and <code>c</code> is that the expression <code>b + c</code> be
of type <code>matrix</code>. For example, <code>b</code> could be of type <code>matrix</code> and <code>c</code>
of type <code>real</code>, because adding a matrix to a scal