an>,
    <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>iris</span>, <span class='kw'>color</span> <span class='kw'>=</span> <span class='no'>Species</span>,
    <span class='kw'>size</span> <span class='kw'>=</span> <span class='no'>Petal.Width</span>, <span class='kw'>alpha</span> <span class='kw'>=</span> <span class='fu'>I</span>(<span class='fl'>0.7</span>))
  <span class='no'>doc</span> <span class='kw'>=</span> <span class='fu'><a href='addPlot.html'>addPlot</a></span>( <span