Where did my Lines go? Visualizing Missing Data in Parallel Coordinates

Bäuerle, Alex; Onzenoodt, Christian van; Kinderen, Simon der; Westberg, Jimmy Johansson; Jönsson, Daniel; Ropinski, Timo

Where did my Lines go? Visualizing Missing Data in Parallel Coordinates

Date

2022

Authors

Bäuerle, Alex
Onzenoodt, Christian van
Kinderen, Simon der
Westberg, Jimmy Johansson
Jönsson, Daniel
Ropinski, Timo

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.

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
}
}