New plot capability: "bee swarm" plots

[Ethan A M. <sf...@us...>]

On the discussion board <https://sourceforge.net/p/gnuplot/discussion/5924>
Kevin Rattigan asked if there is a gnuplot equivalent to the types of
plot provided by the "beeswarm" module for R.  He provided this link
to examples:

  http://www.cbs.dtu.dk/~eklund/beeswarm/

It turns out that these plots arise naturally from a simple jitter
offset applied to overlapping points in a scatter plot.  Since I already
had a jitter patch lying around, I modified it to apply a sequential
linear jitter rather than a random jitter, and here you go:

>From the ChangeLog

    Syntax:
         set jitter {overlap <yposition>} {spread <factor>} {wrap <limit>}
                    {swarm|square}
     When the x coordinates of a data set are restricted to discrete values
     then many points may lie exactly on top of each other.  Jittering
     introduces an offset to the coordinates of these superimposed points
     that spreads them into a cluster.  This type of plot is called a 
     "bee swarm" plot in R and other packages.

Online copy of the new demo

	 http://gnuplot.sourceforge.net/demo_5.1/jitter.html

Please try it out and offer suggestions.

Would it make sense to apply the jitter to other plot styles
in addition to "with points"?
Is there a logical 3D counterpart?


	Ethan