3.9 Theory of data graphics (ToDG): Data-ink and graphical re-design
- Large share of ink on a graphic should present data-information, the ink changing as the data change (Tufte 2001, 2:93)
- Data-ink: Non-erasable core of a graphic, the non-redundant ink arranged in response to variation in the numbers represented (Tufte 2001, 2:93)
- \(\text{Data-ink ratio} = \frac{\text{data-ink}}{\text{total ink used to print the graphic}}\) = proportion of a graphic’s ink devoted to the non-redundant display of data-information = 1.0 - proportion of a graphic that can be erased without loss of data-information (Tufte 2001, 2:93)
References
Tufte, Edward R. 2001. The Visual Display of Quantitative Information. Vol. 2. Graphics press Cheshire, CT.