g><code>append_row</code></strong><code>(matrix x, matrix y)</code><br>
Combine matrices x and y by rows. The matrices must have the same
number of columns.</p>
<!-- matrix; append_row; (matrix x, row_vector y); -->
<p></p>
<p><code>matrix</code> <strong><code>append_row</code></strong><code>(matrix x, row_vector y)</code><br>
Combine matrix x and row vector y by rows. The matrix and the row
vector must have the same number of columns.</p>
<!-- matrix; append_row; (row_vector x, matrix y); -->
<p></p>
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