A grouped boxplot is a boxplot where categories are organized in groups and subgroups.
Here we visualize the distribution of 7 groups (called A to G) and 2 subgroups (called low and high). Note that the group must be called in the
X argument of
ggplot2. The subgroup is called in the
Note that an alternative to grouped boxplot is to use faceting: each subgroup (left) or each group (right) is represented in a distinct panel.