Inspired by the online_actogram project. Reads Firefox's database format (places.sqlite) but can ingest any stream of event timestamps.
Each column represents the 24 hours (top: 00:00, bottom: 23:00) of a single day (left: earliest, right: most recent) where the brightness of a cell corresponds to wakefulness estimated by browser activity
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Tries to estimate sleep cycle phase (red cells above)
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Generates plots of sleepcycle frequency components
You can use the Pluto.jl notebook acto_notebook.jl to generate your own. A static version of the notebook interface with usage instructions can be found at https://blepabyte.github.io/browser-actogram.