bel="anchor" href="#arg-environment"></a></dt>
<dd><p>An environment in which to look for variables not found in <code>data</code>.</p></dd>

</dl></div>
    <div id="value">
    <h2>Value</h2>
    <p>a gg object</p>
    </div>
    <div id="details">
    <h2>Details</h2>
    <p>There are two basic approaches: <em>dot-density</em> and <em>histodot</em>.
With dot-density binning, the bin positions are determined by the data and
<code>binwidth</code>, which is the maximum width of each bin. See Wilkinson
(1999