In the example code, notice that the NAME=”scale” option in the RANGEATTRMAP
statement provides a name for the range attribute map. A RANGE statement specifies a
color for each of four ranges. Because the SCATTERPLOT statement uses the
ContrastColor style attribute for the marker colors in a grouped plot, the
RANGEALTCOLOR= option is used in each RANGE statement to define the range
color. The ATTRVAR=weightrange option in the RANGEATTRVAR statement
provides a name ...
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