
<code>FFTrees</code> object.
<!-- ToDo: Applying an existing FFTrees object to new data (in plot) does not seem to work: -->
When predicting performance for a new dataset (e.g.;
<code>data = test.data</code>), the plotting and printing functions will
automatically apply an existing <code>FFTrees</code> object to the new
data and compute corresponding performance statistics (using the
<code><a href="../reference/fftrees_apply.html">fftrees_apply()</a></code> function). However, when applying existing
FFTs t