span>
<span class="r-in"><span><span class="va">model</span> <span class="op">&lt;-</span> <span class="fu"><a href="make_model.html">make_model</a></span><span class="op">(</span><span class="st">'X-&gt;Y'</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">data</span>  <span class="op">&lt;-</span>  <span class="fu"><a href="data_helpers.html">collapse_data</a></span><span class="op">(</span><span class="fu"><a href="data_helpers.html">make_data</a></span><span class="o