>, <span class="va">sex</span>, <span class="va">measurement</span><span class="op">)</span><span class="op">]</span></span>
<span></span>
<span><span class="co"># extract data limited only to values flagged for inclusion:</span></span>
<span><span class="va">only_included_data</span> <span class="op">&lt;-</span> <span class="va">cleaned_data</span><span class="op">[</span><span class="va">gcr_result</span> <span class="op">==</span> <span class="st">"Include"</span><span class="op">]</span></span></code><