Changing the order of the data changes the order in which the group values appear on
the plot. It also changes their association with the GraphData1–GraphDataN style
elements, which might change their appearance. This is apparent in the previous
example.
Another way to arrange your data is to use the GROUPORDER= option. For many plots,
you can instead use the GROUPORDER= option to change the order of the groups in
your plot without having to create a sorted data set or change the order of the data in the
original data set.
Note:The GROUPORDER= option is ignored if the GROUP= option is not used.
The GROUPORDER= option determines ...
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