Package: ActCR Type: Package Title: Extract Circadian Rhythms Metrics from Actigraphy Data Version: 0.4.0 Authors@R: c( person(given = "Junrui", family = "Di", role = c("aut", "cre"), email = "dijunrui@gmail.com"), person(given = "Vadim", family = "zipunnikov", role = c("aut"), email = "vadim.zipunnikov@gmail.com"), person(given = "Vincent", family = "van Hees", role = c("ctb"), email = "v.vanhees@accelting.com") ) Maintainer: Junrui Di Description: Circadian rhythms are rhythms that oscillate about every 24 h, which has been observed in multiple physiological processes including core body temperature, hormone secretion, heart rate, blood pressure, and many others. Measuring circadian rhythm with wearables is based on a principle that there is increased movement during wake periods and reduced movement during sleep periods, and has been shown to be reliable and valid. This package can be used to extract nonparametric circadian metrics like intradaily variability (IV), interdaily stability (IS), and relative amplitude (RA); and parametric cosinor model and extended cosinor model coefficient. Details can be found in Junrui Di et al (2019) . License: GPL-3 Imports: zoo, cosinor, cosinor2, dplyr, minpack.lm Depends: R (>= 4.4.0), Encoding: UTF-8 LazyData: true URL: https://github.com/junruidi/ActCR BugReports: https://github.com/junruidi/ActCR/issues RoxygenNote: 7.3.3 Config/pak/sysreqs: cmake make libicu-dev libuv1-dev zlib1g-dev Repository: https://junruidi.r-universe.dev Date/Publication: 2026-01-11 19:39:33 UTC RemoteUrl: https://github.com/junruidi/actcr RemoteRef: HEAD RemoteSha: 9de4781604d7b8d9c4de3340002fd69e8942f667 NeedsCompilation: no Packaged: 2026-06-20 06:40:44 UTC; root Author: Junrui Di [aut, cre], Vadim zipunnikov [aut], Vincent van Hees [ctb]