Interactive Horizon Graphs
Many approaches have been proposed for the visualization of multiple time series. Two prominent approaches are reduced line charts (RLC), which display small multiples for time series, and the more recent horizon graphs (HG). We propose to unify RLC and HG using a new technique—interactive horizon graphs (IHG)— which uses pan and zoom interaction to increase the number of time series that can be analysed in parallel. In a user study we compared RLC, HG, and IHG across several tasks and numbers of time series, focusing on datasets with both large scale and small scale variations. Our results show that IHG outperform the other two techniques in complex comparison and matching tasks where the number of charts is large. In the hardest task IHG have a significantly higher number of good answers (correctness) than HG (+14%) and RLC (+51%) and a lower error magnitude than HG (-64%) and RLC (-86%).
Interactive Horizon Graphs: Improving the Compact Visualization of Multiple Time Series
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI 2013), Apr 2013, Paris, France. ACM
Progressive Horizon Graphs: Improving Small Multiples Visualization of Time Series
IEEE VIS 2012 Electronic Conference Proceedings, Seattle, WA, USA. IEEE