specifies a variable that is used to group the data. The plot elements for each group
value are automatically distinguished by different visual attributes. Each distinct
group value is represented in the graph by a different line color. Line patterns are not
changed across groups.
Interaction
When the procedure contains both computed and non-computed plot
statements, such as a box plot overlaid with a scatter plot, the
assignment of group attributes does not always align between the plots.
If you need to control the group attribute assignment for these types of
plots, consider using an attribute map. For more information, see
“Using ...
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