PCP-Ed: Parallel coordinate plots for ensemble data

The Parallel Coordinate Plot(PCP)is a complex visual design commonly used for the analysis of high-dimensional data.Increasing data size and complexity may make it challenging to decipher and uncover trends and outliers in a confined space.A dense PCP image resulting from overlapping edges may cause patterns to be covered.We develop techniques aimed at exploring the relationship between data dimensions to uncover trends in dense PCPs.We introduce correlation glyphs in the PCP view to reveal the strength of the correlation between adjacent axis pairs as well as an interactive glyph lens to uncover links between data dimensions by investigating dense areas of edge intersections.We also present a subtraction operator to identify differences between two similar multivariate data sets and relationship-guided dimensionality reduction by collapsing axis pairs.We finally present a case study of our techniques applied to ensemble data and provide feedback from a domain expert in epidemiology.

P-Lite: A study of parallel coordinate plot literacy

Visualization literacy,the ability to interpret and comprehend visual designs,is recognized as an essential skill by the visualization community.We identify and investigate barriers to comprehending parallel coordinates plots(PCPs),one of the advanced graphical representations for the display of multivariate and high-dimensional data.We develop a parallel coordinates literacy test with diverse images generated using popular PCP software tools.The test improves PCP literacy and evaluates the user’s literacy skills.We introduce an interactive educational tool that assists the teaching and learning of parallel coordinates by offering a more active learning experience.Using this pedagogical tool,we aim to advance novice users’parallel coordinates literacy skills.Based on the hypothesis that an interactive tool that links traditional Cartesian Coordinates with PCPs interactively will enhance PCP literacy further than static slides,we compare the learning experience using traditional slides with our novel software tool and investigate the efficiency of the educational software with an online,crowdsourced user-study.User-study results show that our pedagogical tool positively impacts a user’s PCP comprehension.