Boxdot plot functions
The boxdot plot is a variation on Tukey's box-and-whisker plot, and Parzen's quantile boxplot.
Its purpose is to overlay the data points on a boxplot in a systematic manner, as opposed to jittering.
The data points for each box are arranged in sorted order, so that they resemble an empirical distribution function on its side.
I was first introduced to this type of plot by Dan Holder, who calls it a boxdot plot.
I am grateful to David Shera for the background information on this type of plot, and sharing R code that inspired this function, and suggestions to improve it.
Functions posted:
boxdot.r This is my simple version of the boxdot plot function.
boxquant.s This is David Shera's version of the function.
lighten.s This is David Shera's function that is called by boxquant.s
References:
E. Parzen, 1979: Nonparametric statistical data modeling. Journal of the American Statistical Association, 74: 105-121.
D. M. Shera, 1991: Some uses of quantile plots to enhance data presentation. Computing Science and Statistics, 23: 50-53.
J. W. Tukey, 1977: Exploratory Data Analysis. Addison-Wesley.