<code>(vector x, vector y)</code><br>
<code>x .*= y</code> is equivalent to <code>x = x .* y</code>.</p>
<!-- void; operator.*=; (row_vector x, row_vector y); -->
<p></p>
<p><code>void</code> <strong><code>operator.*=</code></strong><code>(row_vector x, row_vector y)</code><br>
<code>x .*= y</code> is equivalent to <code>x = x .* y</code>.</p>
<!-- void; operator.*=; (matrix x, matrix y); -->
<p></p>
<p><code>void</code> <strong><code>operator.*=</code></strong><code>(matrix x, matrix y)</code><br>
<code>x 