Fig. 5
From: Towards PPG-based anger detection for emotion regulation
UMAP data visualization of entire PPG dataset. Colored by individual day session, where each participant had two day sessions ( e.g., P01-A is participant 01’s day A session). Dominant structure is due to individual differences. Edge connections show similarity between certain individuals and sessions. During visual cluster analysis individual points were checked for their actual labels to ensure color assignment were interpreted correctly