Design and Data Variation

Categories: Data Visualization
04th

Deception results from the incorrect extrapolation of visual expectations generated at one place on the graphic to other places.
The confounding of design variation with data variation over the surface of a graphic leads to ambiguity and deception, for the eye may mix up changes in the design with changes in the data.

Design principle – Show data variation, not design variation

Time-series Principal – In time-series displays of money, deflated and standardized units of monetary measurement are nearly always better than nominal units.

Notes from The Visual Display of Quantitative Information by Edward R. Tufte

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