Where did my Lines go? Visualizing Missing Data in Parallel Coordinates
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Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association and John Wiley & Sons Ltd.
Abstract
We evaluate visualization concepts to represent missing values in parallel coordinates. We focus on the trade-off between the ability to perceive missing values and the concept's impact on common tasks. For this purpose, we identified three missing value representation concepts: removing line segments where values are missing, adding a separate, horizontal axis onto which missing values are projected, and using imputed values as a replacement for missing values. For the missing values axis and imputed values concepts, we additionally add downplay and highlight variations. We performed a crowd-sourced, quantitative user study with 732 participants comparing the concepts and their variations using five real-world datasets. Based on our findings, we provide suggestions regarding which visual encoding to employ depending on the task at focus.
Description
CCS Concepts: Computing methodologies --> Perception; Human-centered computing --> User studies; Visualization techniques
@article{10.1111:cgf.14536,
journal = {Computer Graphics Forum},
title = {{Where did my Lines go? Visualizing Missing Data in Parallel Coordinates}},
author = {Bäuerle, Alex and Onzenoodt, Christian van and Kinderen, Simon der and Westberg, Jimmy Johansson and Jönsson, Daniel and Ropinski, Timo},
year = {2022},
publisher = {The Eurographics Association and John Wiley & Sons Ltd.},
ISSN = {1467-8659},
DOI = {10.1111/cgf.14536}
}