"op">)</span><span class="op">)</span><span class="op">)</span></span></code></pre></div>
<p>By default, we see that individual trees are fully grown (without a
p-value threshold). The first split is according to <code>grp2</code>
because it best explains the group differences. Subsequent splits are
according to <code>grp1</code> even though the chi2 values are close to
zero. They only appear because there is no p-value-based stopping
criterion.</p>
<div class="sourceCode" id="cb7"><pre class="downlit sourc