he arrow in [0,1] from tip to base</p></dd>


<dt id="arg-add">add<a class="anchor" aria-label="anchor" href="#arg-add"></a></dt>
<dd><p>logical indicating whether this plot should be added to the last one</p></dd>


<dt id="arg-group-">group...<a class="anchor" aria-label="anchor" href="#arg-group-"></a></dt>
<dd><p>list of arguments passed to group_2d_graphics (or NULL)</p></dd>


<dt id="arg-plot-">plot...<a class="anchor" aria-label="anchor" href="#arg-plot-"></a></dt>
<dd><p>additional arguments passed