This demonstration compares the United States military services according to the number of service members that are married or single, and have children or not.
The following parallel coordinate system shows the number of United States military service members in 2009 with and without children, broken down by their pay grade and whether the service member is single or married. Each blue line depicts a group of military members who share the same pay grade. Unfortunately, the lines cannot be selected to provide identification of the demographic depicted, nor can they be highlighted to facilitate reading a single line through all coordinates . The potential benefit of this feature is clear when observing the crowded group at the bottom of this parallel coordinate system. Another issue is that http://code.google.com/p/parallel-coordinates/ cannot render more than one parallel coordinate system on a single page, so this is an image. Being able to color the lines differently would allow us to distinguish between the classes of pay grade (enlisted, officer, warrant officer), but, unfortunately, only one color is permitted. Control for ordering within the Pay Grade coordinate is also not provided, so O-10 is (lexicographically) between O-1 and O-2.