Graphics Reference
In-Depth Information
Image from "Energy Technology Perspectives 2012 Online Data" at
http://www.iea.org/etp/explore
©
OECD/IEA 2012, developed by Raureif GmbH and Christian Behrens
Area size chart
Data variables
: 1 x categorical, 1 x quantitative-ratio.
Visual variables
: Area, color-hue.
Description
: This type of chart doesn't have an obvious name, so Area size chart is
a best attempt! It is a very simple visual device that deploys the visual variable of
area—normally a rectangle or circle—to compare two (or maybe several) values.
Normally these values will vary in size quite dramatically to convey a certain shock
at the disparity. The subject matter may relate to a part-of-a-whole comparison
(portion judgment) but more typically involves separate, independent categories
(comparative judgment).
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