| 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)