nparACT: Non-Parametric Measures of Actigraphy Data

Computes interdaily stability (IS), intradaily variability (IV) & the relative amplitude (RA) from actigraphy data as described in Blume et al. (2016) <doi:10.1016/j.mex.2016.05.006> and van Someren et al. (1999) <doi:10.3109/07420529908998724>. Additionally, it also computes L5 (i.e. the 5 hours with lowest average actigraphy amplitude) and M10 (the 10 hours with highest average amplitude) as well as the respective start times. The flex versions will also compute the L-value for a user-defined number of minutes. IS describes the strength of coupling of a rhythm to supposedly stable zeitgebers. It varies between 0 (Gaussian Noise) and 1 for perfect IS. IV describes the fragmentation of a rhythm, i.e. the frequency and extent of transitions between rest and activity. It is near 0 for a perfect sine wave, about 2 for Gaussian noise and may be even higher when a definite ultradian period of about 2 hrs is present. RA is the relative amplitude of a rhythm. Note that to obtain reliable results, actigraphy data should cover a reasonable number of days.

Version:	0.9.1
Depends:	R (≥ 3.5)
Imports:	ggplot2, grid, stringr, zoo, tools
Suggests:	knitr, rmarkdown, roxygen2
Published:	2025-12-16
DOI:	10.32614/CRAN.package.nparACT
Author:	Christine Blume [aut, cre]
Maintainer:	Christine Blume <christine.blume at unibas.ch>
License:	GPL-3
NeedsCompilation:	no
Language:	en-GB
Citation:	nparACT citation info
Materials:	README, NEWS
CRAN checks:	nparACT results

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