abindex="-1"></a><span class="kw">transformed data</span> {</span>
<span id="cb4-8"><a href="#cb4-8" aria-hidden="true" tabindex="-1"></a>  <span class="dt">int</span> N_train = N - N_test;</span>
<span id="cb4-9"><a href="#cb4-9" aria-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[<