Summarized Data Distributions - R Graphics - page 179

scale="count" to scale the areas proportionally to the number of observations in each group
( Figure 6-24 ) . In this example, there are slightly fewer females than males, so the f violin is
slightly narrower:
# Scaled area proportional to number of observations
p + geom_violin(scale = "count" )
Figure 6-24. Violin plot with area proportional to number of observations
To change the amount of smoothing, use the adjust parameter, as described in Making a Dens-
ity Curve . The default value is 1; use larger values for more smoothing and smaller values for
less smoothing ( Figure 6-25 ):
# More smoothing
p + geom_violin(adjust = 2 )
# Less smoothing
p + geom_violin(adjust = .5 )