nk">as.numeric</a></span><span class="op">(</span><span class="va">mydata</span><span class="op">$</span><span class="va">Cl.thickness</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">target_col</span> <span class="op">&lt;-</span> <span class="st">"Cl.thickness"</span></span></span>
<span class="r-in"><span><span class="va">maintask</span> <span class="op">&lt;-</span> <span class="fu">mlr3</span><span class="fu">::</span><span class="va"><a href="https://mlr3.mlr-org