Title:	Non-Parametric Measures of Actigraphy Data
Version:	0.9.0
Description:	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.
License:	GPL-3
Imports:	ggplot2, grid, stringr, zoo, tools
Language:	en-GB
LazyData:	true
RoxygenNote:	7.3.2
Encoding:	UTF-8
Depends:	R (≥ 3.5)
Suggests:	knitr, rmarkdown
VignetteBuilder:	knitr
NeedsCompilation:	no
Packaged:	2025-09-23 12:04:25 UTC; chris
Author:	Christine Blume [aut, cre]
Maintainer:	Christine Blume <christine.blume@unibas.ch>
Repository:	CRAN
Date/Publication:	2025-09-23 22:50:02 UTC

Actigraphy results from a participant.

Description

A dataset containing actimetry results for one participant. Data points have been collected every 15 sec and span approx. 3.5 days. The variables are as follows:

Usage

sleepstudy

Format

A txt file with 20000 rows and 2 variables:

Type

Time stamp

Description

Gives the activity measured with actigrapy (arbitrary number)