e we want to visualize. We usually specify the tree to
show by an integer value, such as <code>tree = 2</code>, which will plot
the corresponding tree (i.e., Tree #2) of the <code>FFTrees</code>
object. Alternatively, we can specify <code>tree = "best.train"</code>
or <code>tree = "best.test"</code> to visualize the best training or
prediction tree, respectively. This selects and shows the tree with the
highest goal value (e.g., weighted accuracy <code>wacc</code>) when
fitting or testing data.</p></li>
<