Basic Analysis and Graphing - SAS

468 Creating Tree Maps Chapter 19
Example of Tree Maps
5. Select OZONE and click Coloring.
6. Click OK.
The report window appears.
Figure 19.3 Ozone Levels in a Tree Map
Compare the bar chart to the tree map. Because the tree map folds the data over two dimensions (size and
color), each city’s data looks more distinctive than it did in the bar chart.
Note the following about this tree map:
• The magnitude of the ozone level for each city is represented by color.
• Each rectangle is colored based on a continuous color spectrum, with bright blue on the lowest end and
bright red on the highest end. In this tree map, Des Moines has the lowest ozone levels, and Los Angeles
has the highest ozone levels.
• Ozone levels somewhere in the middle decrease the intensity of the color, so pale blue, and pink indicate
levels that are closer to the mean ozone level.
• Cities colored black have missing ozone values.
Launch the Tree Map Platform
Launch the Tree Map platform by selecting Graph > Tree Map.