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Radar Charts

Radar charts are not commonly seen in the United States; they are used more often in Europe and Asian countries. A radar chart uses a separate axis (although representing the same values) for each category radiating out from the center. It's almost like a line chart that has each line end folded back so it connects to its beginning.

There are three versions of the radar chart: one that uses data markers for the intersections, one that uses simple lines, and a third that uses filled areas within each series. All types let you use a logarithmic scale for the value axis. Figure 12.19 shows an example radar chart.


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