https://shanshanchen-biostat.r-universe.devRecent package updates in shanshanchen-biostatR-universehttps://github.com/shanshanchen-biostat.pnghttps://shanshanchen-biostat.r-universe.devTue, 28 Jul 2026 15:00:02 GMTschen3@vcu.edu (Shanshan Chen)PI-Change is a prior-informed multiple change point detection method that incorporates prespecified plausible change point locations through a time-varying penalized likelihood. The method extends multiple change point detection beyond purely data-driven segmentation by allowing external knowledge about plausible change point locations to enter the objective function; see Jacobs and Chen (2026) <doi:10.48550/arXiv.2605.01003>.https://github.com/r-universe/shanshanchen-biostat/actions/runs/36311386872Tue, 28 Jul 2026 15:00:02 GMTPiChange0.0.6successhttps://shanshanchen-biostat.r-universe.devhttps://github.com/shanshanchen-biostat/pichangegetting-started.Rmdgetting-started.htmlGetting Started with Pi-Change2026-07-28 15:00:022026-07-28 15:00:02google-mobility.Rmdgoogle-mobility.htmlPi-Change: Google Mobility Application2026-07-28 15:00:022026-07-28 15:00:02oil-price.Rmdoil-price.htmlPi-Change: Oil Price Application2026-07-28 15:00:022026-07-28 15:00:02schen3@vcu.edu (Shanshan Chen)A generic sleep–wake cycle detection algorithm for analyzing unlabeled actigraphy data. The algorithm has been validated against event markers using data from the Multi-Ethnic Study of Atherosclerosis (MESA) Sleep study, and its methodological details are described in Chen and Sun (2024) <doi:10.1098/rsos.231468>. The package provides functions to estimate sleep metrics (e.g., sleep and wake onset times) and circadian rhythm metrics (e.g., mesor, phasor, interdaily stability, intradaily variability), as well as tools for screening actigraphy quality, fitting cosinor models, and performing parametric change point detection. The workflow can also be used to segment long actigraphy sequences into regularized structures for physical activity research.https://github.com/r-universe/shanshanchen-biostat/actions/runs/37907699686Wed, 12 Nov 2025 11:10:02 GMTCircaCP0.1.2successhttps://shanshanchen-biostat.r-universe.devhttps://github.com/cran/CircaCPgetting-started.Rmdgetting-started.htmlCircaCP: Getting Started2025-11-12 11:10:022025-11-12 11:10:02