Computes interdaily stability (IS), intradaily variability (IV) & the relative amplitude (RA) from actigraphy data as described in Blume et al. (2016) and 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. Note that to obtain reliable results, actigraphy data should cover a reasonable number of days.

Documentation

Manual: nparACT.pdf
Vignette: None available.

Maintainer: Christine Blume <christine.blume at sbg.ac.at>

Author(s): Christine Blume <christine.blume at sbg.ac.at> Nayantara Santhi <n.santhi at surrey.ac.uk> Manuel Schabus <manuel.schabus at sbg.ac.at>

Install package and any missing dependencies by running this line in your R console:

install.packages("nparACT")

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Imports ggplot2, grid, stringr, zoo
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Package nparACT
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URL https://www.r-project.org
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Version 0.7
Published 2016-12-23
License GPL-2
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NeedsCompilation no
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CRAN checks nparACT check results
Package source nparACT_0.7.tar.gz