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‘nparACT’ package for R: A free software tool for the non-parametric analysis of actigraphy data

Blume, C, Santhi, N and Schabus, M (2016) ‘nparACT’ package for R: A free software tool for the non-parametric analysis of actigraphy data MethodsX, 3. pp. 430-435.

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For many studies, participants’ sleep-wake patterns are monitored and recorded prior to, during and following an experimental or clinical intervention using actigraphy, i.e. the recording of data generated by movements. Often, these data are merely inspected visually without computation of descriptive parameters, in part due to the lack of user-friendly software. To address this deficit, we developed a package for R Core Team [6], that allows computing several non-parametric measures from actigraphy data. Specifically, it computes the interdaily stability (IS), intradaily variability (IV) and relative amplitude (RA) of activity and gives the start times and average activity values of M10 (i.e. the ten hours with maximal activity) and L5 (i.e. the five hours with least activity). Two functions compute these ‘classical’ parameters and handle either single or multiple files. Two other functions additionally allow computing an L-value (i.e. the least activity value) for a user-defined time span termed ‘Lflex’ value. A plotting option is included in all functions. The package can be downloaded from the Comprehensive R Archives Network (CRAN).

Item Type: Article
Subjects : Biosciences
Divisions : Surrey research (other units)
Authors :
Blume, C
Schabus, M
Date : 2016
DOI : 10.1016/j.mex.2016.05.006
Copyright Disclaimer : © 2016 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://
Uncontrolled Keywords : Actigraphy, R, Sleep, Circadian rhythm, Zeitgeber, Internal clock, Amplitude
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 10:49
Last Modified : 24 Jan 2020 20:05

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