on</span><span class="op">(</span><span class="va">x</span>, <span class="va">trim</span> <span class="op">=</span> <span class="fl">0</span><span class="op">)</span> <span class="fu"><a href="https://rdrr.io/r/base/data.frame.html" class="external-link">data.frame</a></span><span class="op">(</span>y_bar <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/mean.html" class="external-link">mean</a></span><span class="op">(</span><span class="va">x</span>, trim <span class="op">=</span>