ps://mc-stan.org/docs/functions-reference/matrix_operations.html#matrix-concatenation">view current version</a>.
</div>
<div id="matrix-concatenation" class="section level2">
<h2><span class="header-section-number">5.10</span> Matrix Concatenation</h2>
<p>Stanâ€™s matrix concatenation operations <code>append_col</code> and <code>append_row</code>
are like the operations <code>cbind</code> and <code>rbind</code> in R.</p>
<div id="horizontal-concatenation" class="section level4">
<h4><span class="header