-section-number">5.10.0.1</span> Horizontal concatenation</h4>
<!-- matrix; append_col; (matrix x, matrix y); -->
<p></p>
<p><code>matrix</code> <strong><code>append_col</code></strong><code>(matrix x, matrix y)</code><br>
Combine matrices x and y by columns. The matrices must have the same
number of rows.</p>
<!-- matrix; append_col; (matrix x, vector y); -->
<p></p>
<p><code>matrix</code> <strong><code>append_col</code></strong><code>(matrix x, vector y)</code><br>
Combine matrix x and vector y by columns