-hidden="true" tabindex="-1"></a>  <span class="dt">array</span>[N] <span class="dt">int</span> permutation = permutation_rng(N);</span>
<span id="cb4-10"><a href="#cb4-10" aria-hidden="true" tabindex="-1"></a>  <span class="dt">vector</span>[N_train] x_train = x[permutation[<span class="dv">1</span> : N_train]];</span>
<span id="cb4-11"><a href="#cb4-11" aria-hidden="true" tabindex="-1"></a>  <span class="dt">vector</span>[N_train] y_train = y[permutation[<span class="dv">1</span> : N_train]];</span>
<span