 =</span> <span class="fu">c</span>(<span class="dv">1</span>, <span class="dv">1</span>), <span class="at">z =</span> <span class="fu">c</span>(<span class="sc">-</span><span class="dv">1</span>, <span class="dv">1</span>))</span>
<span id="cb23-2"><a href="#cb23-2" tabindex="-1"></a></span>
<span id="cb23-3"><a href="#cb23-3" tabindex="-1"></a><span class="co"># Find all rows where EVERY numeric variable is greater than zero</span></span>
<span id="cb23-4"><a href="#cb23-4" tabindex="-1"></a>df <span clas