Dot Plots

Dot plots are an alternative to histograms of continuous data. In a dot plot each data point (individual observation) is plotted on a continuous scale using a symbol (on the X-axis). In order to prevent dot symbols from overlapping, where two values are separated by less than a certain increment the dots are stacked vertically.

Aabel applies the method published by Leland Wilkinson (1999) to generate dot plots, but in addition, uses modifications necessary to allow:
• Dynamically compensating for modifying the plot aspect ratio
• Scaling of dot size (width)
• Using ellipsoids dot stacks for making the plot more readable when dot stacks are either too uniform or too cluttered by vertical overlaps