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Just a note

There are several variations of dot plots that do not use random numbers. For example squares can be filled in on graph paper. Starting at the center, successive points are added on each side. The visual effect of this is very different from a jittered dot plot, and it is really a variation upon the stem and leaf plot. Alternatively points can all be plotted at the same value on the x-axis producing a string of points vertically above each other. This is not recommended as duplicate values are not represented.

The following code produces a jittered dot plot using R.


  • par(xaxt='n') tells R to not put x-axis labels on subsequent plots.
  • par(xaxt='s') tells R to show x-axis labels on subsequent plots.