nparACT: Non-Parametric Measures of Actigraphy Data

Computes interday stability (IS), intraday variability (IV) & the relative amplitude (RA) from actigraphy data as described in van Someren et al. (1999). 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. For reliable results, actigraphy data should cover at least 7 days.

Version: 0.1
Imports: ggplot2, grid, stringr, zoo
Published: 2015-10-22
Author: Christine Blume Nayantara Santhi Manuel Schabus
Maintainer: Christine Blume <christine.blume at>
License: GPL-2
NeedsCompilation: no
CRAN checks: nparACT results


Reference manual: nparACT.pdf
Package source: nparACT_0.1.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
OS X Snow Leopard binaries: r-release: not available, r-oldrel: not available
OS X Mavericks binaries: r-release: nparACT_0.1.tgz