graph violin plot Alejandra Gonzalez-Beltran Orlaith Burke http://en.wikipedia.org/wiki/Violin_plot and Hintze, J. L. and R. D. Nelson (1998). Violin plots: a box plot-density trace synergism. The American Statistician, 52(2):181-4. Philippe Rocca-Serra a violin plot is a plot combining the features of box plot and kernel density plot. The violin plot is therefore similar to box plot but it incorporated in the display the probability density of the data at different values. Typically violin plots will include a marker for the median of the data and a box indicating the interquartile range, as in standard box plots. http://www.inside-r.org/packages/cran/vioplot/docs/vioplot vioplot( x, ..., range=1.5, h, ylim, names, horizontal=FALSE, col="magenta", border="black", lty=1, lwd=1, rectCol="black", colMed="white", pchMed=19, at, add=FALSE, wex=1, drawRect=TRUE) ready for release