st: Package to construct violin plots on SSC (vioplot)

[Nick Winter <nwinter@virginia.edu>]

Greetings,

Kit Baum has just posted my package -vioplot-, which constructs violin 
plots.

Violin plots are a modification of box plots, that add plots of the 
estimated kernel density to the summary statistics displayed by box 
plots.  They include a marker for the median of the data, a box 
indicating the interquartile range, and spikes extending to the upper- 
and lower-adjacent values, as in standard box plots.  Overlaid with this 
modified box plot is a density, estimated by kdensity.  They were first 
described by Hintze and Nelson (1998).

(There is a separate package, "violin," by Thomas Steichen that 
constructs violin plots as well.  The major difference is that program 
runs under the "old," v7 graphics.)

Hintze, Jerry L., and Ray D. Nelson. 1998.  "Violin Plots: A Box 
Plot-Density Trace Synergism." The American Statistician 52(2):181-84.

I'd love any feedback on the program.

Best,
Nick Winter


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Nicholas Winter                                 434.924.6994 t
Assistant Professor                             434.924.3359 f
Department of Politics                  nwinter@virginia.edu e
University of Virginia          faculty.virginia.edu/nwinter w
PO Box 400787, 100 Cabell Hall
Charlottesville, VA 22904

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