 class="op">=</span> <span class="st">"best.train"</span><span class="op">)</span></span></code></pre></div>
<p>as <code>data = "train"</code> by default. However, the following
analog expression would fail:</p>
<div class="sourceCode" id="cb10"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="fu"><a href="https://rdrr.io/r/graphics/plot.default.html" class="external-link">plot</a></span><span class="op">(</span><span class="va">titanic.fft</span>, tree <span class="op">=</sp