an class='fu'><a href='https://rdrr.io/r/graphics/plot.default.html'>plot</a></span><span class='op'>(</span><span class='va'>tree2</span>, terminal_panel <span class='op'>=</span> <span class='st'>"matrix"</span><span class='op'>)</span>

<span class='co'># \donttest{</span>
<span class='co'>## Conditional version</span>
<span class='va'>tree3</span> <span class='op'>&lt;-</span> <span class='fu'>networktree</span><span class='op'>(</span>nodevars<span class='op'>=</span><span class='va'>d</span><span clas