nparACT: Non-Parametric Measures of Actigraphy Data

Computes interdaily stability (IS), intradaily 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. Note that to obtain reliable results, actigraphy data should cover a reasonable number of days.

Author
Christine Blume <christine.blume@sbg.ac.at> Nayantara Santhi <n.santhi@surrey.ac.uk> Manuel Schabus <manuel.schabus@sbg.ac.at>
Date of publication
2016-07-01 01:14:56
Maintainer
Christine Blume <christine.blume@sbg.ac.at>
License
GPL-2
Version
0.6
URLs

View on CRAN

Man pages

nparACT_auxfunctions1
List of Auxiliary Functions
nparACT_auxfunctions2
List of Auxiliary Functions
nparACT_base
Classic Nonparametric Actigraphy Measures for Single...
nparACT_base_loop
Classic Nonparametric Actigraphy Measures for Multiple...
nparACT_flex
Extended Nonparametric Actigraphy Measures for Single...
nparACT_flex_loop
Extended Nonparametric Actigraphy Measures for Multiple...
nparACT_ISIVfunctions
List of Functions Computing IS and IV Values
nparACT-package
Non-Parametric Measures of Actigraphy Data
nparACT_RAfunctions
List of Functions Computing RA, L and M Values and the...
sleepstudy
Actigraphy Data from a Sleep Study

Files in this package

nparACT
nparACT/NAMESPACE
nparACT/data
nparACT/data/sleepstudy.rda
nparACT/R
nparACT/R/nparACT_ISIVfunctions.R
nparACT/R/nparACT_flex_loop.R
nparACT/R/nparACT_base.R
nparACT/R/nparACT_auxfunctions2.R
nparACT/R/nparACT-internal.R
nparACT/R/nparACT_flex.R
nparACT/R/nparACT_auxfunctions1.R
nparACT/R/nparACT_base_loop.R
nparACT/R/nparACT_RAfunctions.R
nparACT/MD5
nparACT/DESCRIPTION
nparACT/man
nparACT/man/nparACT_auxfunctions1.Rd
nparACT/man/nparACT_flex.Rd
nparACT/man/nparACT_base.Rd
nparACT/man/sleepstudy.Rd
nparACT/man/nparACT_RAfunctions.Rd
nparACT/man/nparACT_flex_loop.Rd
nparACT/man/nparACT_ISIVfunctions.Rd
nparACT/man/nparACT_base_loop.Rd
nparACT/man/nparACT-package.Rd
nparACT/man/nparACT_auxfunctions2.Rd