Violins with boxplots

If we still want the handy summary statistics that a box plot provides while not sacrificing the benefits of a violin plot, we can simply add a geom_boxplot() on top of the violin geometry in our plot object.

One issue we run into when doing this, however, is that the box plots are awkwardly wide. We only need to see where the horizontal lines are and not much more. Luckily, geom_boxplot() has the argument width, which scales the width of the boxplot (e.g. 0.5 = half-width).

Modify the plot we just made to have a boxplot between the violin and point geometries. In addition, change the points to have shape = 95 which is a horizontal tick mark. Lastly, we forgot to tell the user our kernel width, let's do that now.

Add a geom_boxplot() between violin and point geometries.
Set box alpha to 0 and width to 0.3.
Change point geometry to shape = 95 and delete size argument.
Give plot a subtitle with labs(subtitle = 'Gaussian kernel SD = 2.5').

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Exercise

Violins with boxplots

Instructions