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Time-Aligned Peaks (TAP): A Tool for Visualising Multi-Series Peak Co-Occurrence Cover

Time-Aligned Peaks (TAP): A Tool for Visualising Multi-Series Peak Co-Occurrence

Open Access
|May 2026

Figures & Tables

Figure 1

Summary of TAP’s dual-panel visualisation. The top panel shows raw values as a line plot, while the bottom panel displays stacked peak bars aligned on the same x-axis. Colours and order are consistent across panels. Vertical lines indicate overlapping peaks between primary and secondary variables, aiding quick identification of co-occurrences.

Figure 2

TAP architecture, split by files. The CLI module orchestrates ingestion, alignment, peak detection, visualisation and artefact export through four supporting modules. Outputs include a dual-panel figure, a peak report (CSV) and a binary peak matrix (CSV).

Figure 3

TAP dual-panel visualisation with default overlap markers.

Figure 4

TAP dual-panel visualisation using ‘inverse1’ overlap mode for colour inversion inside the timeline rectangle (peak bar).

Figure 5

TAP dual-panel visualisation using ‘inverse2’ overlap mode, which inverts overlap markers only when their colour would otherwise be too similar, as measured by [25], to the series colours, improving contrast and readability in dense or colour-similar scenarios.

Figure 6

Output matrices. (a) peak reports, (b) binary peak matrix. The input files are examples/synthetic_primary2.csv and examples/synthetic_secondary2.csv from the repository.

Table 1

Analyst self-test results comparing line plots and TAP for detecting overlapping peaks.

DATASETMETHODTIME (s)PRECISIONRECALLF1JACCARD
One-overlapping-peakLine plot20.371.0001.0001.0001.000
TAP5.321.0001.0001.0001.000
Four-overlapping-peakLine plot21.121.0000.7500.8570.750
TAP7.591.0001.0001.0001.000
DOI: https://doi.org/10.5334/jors.681 | Journal eISSN: 2049-9647
Language: English
Page range: 39 - 39
Submitted on: Jan 22, 2026
Accepted on: May 12, 2026
Published on: May 26, 2026
Published by: Ubiquity Press
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2026 Ville Pitkäkangas, published by Ubiquity Press
This work is licensed under the Creative Commons Attribution 4.0 License.