gt;</span> [1] "Petal.Width"  "Petal.Length"</span>
<span class="r-in"><span><span class="fu"><a href="to_formula.html">to_formula</a></span><span class="op">(</span><span class="fu">cut_attrs</span><span class="op">(</span>attrs <span class="op">=</span> <span class="va">x</span><span class="op">)</span>, <span class="st">"Species"</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> Species ~ Petal.Width + Petal.Length</span>
<span class="r-out co"><span cla