<p>I don't really know what happened with your comments. Your first one is still visible, though. I checked myself some of the links you provided, before closing the question. I didn't delete your comments, and apparently they didn't migrate with the question.</p>

<p>I just noticed that Hadley suggested to use <code>reorder()</code> which was already proposed in the links you provided. Hence, your comments came very timely!</p>

<p>I'd like to add that I wouldn't have close it without clear indication of possible duplicates, because (a) a response was already provided, and (b) we welcome question on data visualization and ggplot2, although it's clearly better when they have something to do with information visualization and/or statistics.</p>
