n><span class="op">]</span>
  
<span class="va">node_type</span> <span class="op">=</span> <span class="va">LETTERS</span><span class="op">[</span><span class="va">.x</span><span class="op">]</span>
<span class="co">#The inner map embeds each of the 10 networks of that type</span>
<span class="va">out</span> <span class="op">&lt;-</span> <span class="fl">1</span><span class="op">:</span><span class="fl">10</span> <span class="op">%&gt;%</span>
  <span class="fu"><a href="https://purrr.tidyverse.org/referenc