el="anchor" href="#arg-binpositions"></a></dt>
<dd><p>When <code>method</code> is "dotdensity", "bygroup" (default)
determines positions of the bins for each group separately. "all" determines
positions of the bins with all the data taken together; this is used for
aligning dot stacks across multiple groups.</p></dd>


<dt id="arg-stackdir">stackdir<a class="anchor" aria-label="anchor" href="#arg-stackdir"></a></dt>
<dd><p>which direction to stack the dots. "up" (default),
"down", "center", "centerwhole" (c