Graphics Reference
In-Depth Information
Figure 5-5:
The upper row contains color scales that vary only in
brightness. The second row has color scales that vary in both brightness
and a bit of hue. Both are effective, but the lower color scale is more
interesting and can be more effective.
Extending the e-mail example introduced at the beginning of this chapter,
Figure 5-6
shows node size indicating number of messages, and node color
indicating total e-mail size from yellow indicating small e-mail size to red
indicating large e-mail size.
Figure 5-6:
In this graph of family e-mails, nodes are sized by number of
e-mails, and node color indicates the total size of e-mails ranging from tiny
e-mails in yellow to large e-mails in red.
Combining multiple visual attributes to show different data attributes can
yield some interesting insights that are otherwise hidden in the data.
Figure
5-6
is the first example in this chapter where two visual attributes are used
to show two different data attributes. On the left, nodes are yellow (small
e-mails) and have a slightly larger node size (more e-mails), whereas on the
right side nodes are orange (large e-mails) and have a smaller node size
(fewer e-mails). The interpretation is that the right side represents family
