Teaching:TUW - UE InfoVis WS 2007/08 - Gruppe 09 - Aufgabe 1 - Graphical Integrity: Difference between revisions
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(New page: == Defnition == {{Definition|'''Graphical Integrity''' means that a graph is telling the truth about its underlying data.}} Therefore it has to be ensured that the visual representation ...) |
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!!!NICHT FERTIG!!! | |||
Revision as of 19:05, 7 November 2007
Defnition
Graphical Integrity means that a graph is telling the truth about its underlying data.
Therefore it has to be ensured that the visual representation of the data is consistent with the numerical representation. This can be done by avoiding visual distortion. Sometimes graphs are used to confuse or mislead the naive viewer but that is not a very honorable goal. Graphs that have Graphical Integrity are tools for exploring complicated data, and gaining new insight into quantitive information.
Principles to ensure Graphical Integrity [Tufte, 2001]
- The representation of numbers, as physically measured on the surface of the graphics itself, should be directly proportional to the numerical quantities represented.
- Clear, detailed, and thorough labeling should be used to defeat graphics distortion and ambiguity.
- Show data variation, not design variation.
- In time-series displays of money, deflated and standardized units of monetary measurement are nearly always better than nominal units.
- The number of information-carrying dimensions depicted should not exceed the number of dimensions in the data.
- Graphics must not quote data out of context.
!!!NICHT FERTIG!!!