l">RFT_vertex_analysis</a></span><span class="op">(</span>model <span class="op">=</span> <span class="va">dat_beh</span><span class="op">[</span>,<span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">"sex"</span>,<span class="st">"age"</span><span class="op">)</span><span class="op">]</span>, </span>
<span>  contrast <span class="op">=</span> <span class="va">dat_beh</span><span class="op">[</span>,<span class="st">"age"</span><