violin plots

[norm r. <no...@at...>]

I need to draw some violin graphs
Violin plots are generalization of candle stick plots, you can see one at
http://addictedtor.free.fr/graphiques/graphcode.php?graph=43

I'd like to continue using gnuplot rather then switch to R.  I've never added 
any code to gnuplot but I'm willing to try.
how hard would it be to add this style to gnuplot?
Is there any existing plot style which might be simple to modify?