What is Tufte lie factor?
Graphs rely on our understanding that a number is represented visually by the magnitude of some graphical element. Tufte states the principle that: “The representation of numbers, as physically measured on the surface of the graphic itself, should be directly proportional to the quantities represented.”
What is Tufte Chartjunk?
Chartjunk, coined by Edward Tufte in his book entitled The Visual Display of Quantitative Information, refers to decorations in a graphic that have no purpose.
What is Shneiderman’s visualization mantra?
The Mantra, “Overview first, zoom and filter, then details-on- demand”, describes how data should be presented on screen so that it is most effective for users. Shneiderman has described the ideas in this paper as “descriptive and explanatory” rather than prescriptive [9].
What is non-data-ink?
Non-Data-Ink is accordingly the ink that does not transport the information but it is used for scales, labels and edges. The data-ink ratio is the proportion of Ink that is used to present actual data compared to the total amount of ink (or pixels) used in the entire display.
What does Tufte recommend with regard to data-ink?
The data-ink ratio is a concept created by Edward Tufte, famous author in the field of data visualization. Clearly speaking, the data-ink ratio encourages chart creators to examine if all elements in the chart are relevant to the chart’s message. Or in Edward Tufte own words: “Above all else show the data.”
What is the goal of visualization?
Visualization is a simple technique that you can use to create a strong mental image of a future event. With good use of visualization, you can practice in advance for the event, so that you can prepare properly for it. And by visualizing success, you can build the self-confidence you need to perform well.
What is meant by graphical excellence?
Graphical excellence should: induce the viewer to think about the substance rather than about methodology, graphic design or the technology. give the viewers the greatest number of ideas in the shortest time in the smallest space. tell the truth about the data.
Can lie factor be negative?
Note that the lie factor as calculated here can be negative, as when a presenter wants to convey a false impression of stability.
What is the lie ratio?
The lie factor is the ratio of the effect apparent in the graph to actual effect in the data; if it deviates by more than 0.05 from 1, the graph is generally unacceptable.