sleepstudy

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:

datasets

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.

Christine Blume

nparACT

Non-Parametric Measures of Actigraphy Data

sleepstudy function

A txt file with 20000 rows and 2 variables:<dl>
<dt>Type</dt>
<dd>Time stamp</dd><dt>Description</dt>
<dd>Gives the activity measured with actigrapy (arbitrary number)</dd>
</dl>

Format

Actigraphy results from a participant. — sleepstudy

A txt file with 20000 rows and 2 variables:<dl>
<dt>Type</dt>
<dd>Time stamp</dd>

<dt>Description</dt>
<dd>Gives the activity measured with actigrapy (arbitrary number)</dd>


</dl>

sleepstudy: Actigraphy results from a participant.

Description

Usage

Arguments

Format