Summarized Data Distributions - R Graphics - page 180

Figure 6-25. Left: violin plot with more smoothing; right: with less smoothing
See Also
To create a traditional density curve, see Making a Density Curve .
To use different point shapes, see Changing the Appearance of Points .
Making a Dot Plot
Problem
You want to make a Wilkinson dot plot, which shows each data point.
Solution
Use geom_dotplot() . For this example ( Figure 6-26 ), we'll use a subset of the countries data
set:
library(gcookbook) # For the data set
countries2009 <- subset(countries, Year == 2009 & healthexp > 2000 )
p <- ggplot(countries2009, aes(x = infmortality))
p + geom_dotplot()