title: Increasing the perceptual salience of relationships in parallel coordinate plots.
abstract: We present three extensions to parallel coordinates that increase the perceptual salience of relationships between axes in multivariate data sets: (1) luminance modulation maintains the ability to preattentively detect patterns in the presence of overplotting, (2) adding a one-vs.-all variable display highlights relationships between one variable and all others, and (3) adding a scatter plot within the parallel-coordinates display preattentively highlights clusters and spatial layouts without strongly interfering with the parallel-coordinates display. These techniques can be combined with one another and with existing extensions to parallel coordinates, and two of them generalize beyond cases with known-important axes. We applied these techniques to two real-world data sets (relativistic heavy-ion collision hydrodynamics and weather observations with statistical principal component analysis) as well as the popular car data set. We present relationships discovered in the data sets using these methods.
authors.affiliation: Computer Science, University of North Carolina, Chapel Hill, NC, USA.
authors.forename: Jonathan M
authors.initials: JM
authors.lastname: Harter
authors.forename: Xunlei
authors.initials: X
authors.lastname: Wu
authors.forename: Oluwafemi S
authors.initials: OS
authors.lastname: Alabi
authors.forename: Madhura
authors.initials: M
authors.lastname: Phadke
authors.forename: Lifford
authors.initials: L
authors.lastname: Pinto
authors.forename: Daniel
authors.initials: D
authors.lastname: Dougherty
authors.forename: Hannah
authors.initials: H
authors.lastname: Petersen
authors.forename: Steffen
authors.initials: S
authors.lastname: Bass
authors.forename: Russell M
authors.initials: RM
authors.lastname: Taylor