The resource usage of each program could be displayed as a bar plot of the three quantities. Since the three quantities would have different scales, a proper scaling of the resources would be necessary for this to work well. For example, resource usage could be displayed as a percentage of the total. Alternatively, we could use three bar plots, one for type of resource usage. On each of these plots there would be a bar whose height represents the usage of the corresponding program. This approach would not require any scaling. Yet another option would be to display a line plot of each program’s resource usage. For each program, a line would be constructed by (1) considering processor time, main memory, and disk as different x locations, (2) letting the percentage resource usage of a particu

Describe how you would create visualizations to display information that
describes the following types of systems.
Be sure to address the following issues:

• Representation. How will you map objects, attributes, and relation-
ships to visual elements?

• Arrangement. Are there any special considerations that need to be
taken into account with respect to how visual elements are displayed?

Specific examples might be the choice of viewpoint, the use of trans-
parency, or the separation of certain groups of objects.
• Selection. How will you handle a large number of attributes and data
objects?
The following solutions are intended for illustration.

For each gender, the occupation breakdown could be displayed as an

array of pie charts, where each row of pie charts indicates a particu-
lar level of education and each column indicates a particular year. For

convenience, the time gap between each column could be 5 or ten years.

Alternatively, we could order the occupations and then, for each gen-
der, compute the cumulative percent employment for each occupation.

If this quantity is plotted for each gender, then the area between two

successive lines shows the percentage of employment for this occupa-
tion. If a color is associated with each occupation, then the area between
each set of lines can also be colored with the color associated with each
occupation. A similar way to show the same information would be to
use a sequence of stacked bar graphs.