inoma</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1] 118   9</span>
<span class="r-in"><span><span class="co"># select all variables</span></span></span>
<span class="r-in"><span><span class="va">pcp_data</span> <span class="op">&lt;-</span> <span class="va">Carcinoma</span> <span class="op">|&gt;</span> <span class="fu">pcp_select</span><span class="op">(</span><span class="fl">1</span><span class="op">:</span><span class="fl">9</span><span class="o