Compact Phase Histograms for Guided Exploration of Periodicity

Max Franke, Steffen Koch

Room: 104

2023-10-26T03:36:00ZGMT-0600Change your timezone on the schedule page
Exemplar figure, described by caption below
Our compact widget visualizes a histogram of the phases of event data for a specific period length, which can be interactively adjusted. If the period length matches a periodicity contained in the data, this shows up as a non-uniform distribution in the histogram. In a matrix visualization, the phase histograms for slightly longer and shorted period lengths are also shown row-wise.
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Human-centered computing—Visualization—Visualization techniques


Periodically occurring accumulations of events or measured values are present in many time-dependent datasets and can be of interest for analyses. The frequency of such periodic behavior is often not known in advance, making it difficult to detect and tedious to explore. Automated analysis methods exist, but can be too costly for smooth, interactive analysis. We propose a compact visual representation that reveals periodicity by showing a phase histogram for a given period length that can be used standalone or in combination with other linked visualizations. Our approach supports guided, interactive analyses by suggesting other period lengths to explore, which are ranked based on two quality measures. We further describe how the phase can be mapped to visual representations in other views to reveal periodicity there.