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Visual Variables are a specified set of symbols that can be applied to data
Purpose and Development Our usual way of communicating is with words. Written words consist of single symbols (letters), gaining meaning when arranged in certain combinations.
Points are dimensionless locations on the plane, represented by signs that obviously need to have some size, shape or color for visualization. Changes in motion can include direction, speed, frequency, rhythm, flicker, trails, and style. ↑ http://en.wikipedia.org/wiki/Jock_D._Mackinlay ↑ Carpendale, M. S. T.: Considering Visual Variables as a Basis for Information Visualisation, University of Calgary, Department of Computer Science, 2001-693-16, 2003
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