g.IVIS

To extract interdaily stability and interdaily variability as originally proposed by
 van Someren.

internal

A tool to process and analyse data collected with wearable
raw acceleration sensors as described in Migueles and colleagues (JMPB
2019), and van Hees and colleagues (JApplPhysiol 2014; PLoSONE 2015).
The package has been developed and tested for binary data from
'GENEActiv' <https://activinsights.com/>, binary (.gt3x) and
.csv-export data from 'Actigraph' <https://ametris.com/> devices, and
binary (.cwa) and .csv-export data from 'Axivity'
<https://axivity.com>. These devices are currently widely used in
research on human daily physical activity. Further, the package can
handle accelerometer data file from any other sensor brand providing
that the data is stored in csv format. Also the package allows for
external function embedding.

Vincent T van Hees

GGIR

Raw Accelerometer Data Analysis

Jairo H Migueles

Severine Sabia

Matthew R Patterson

Zhou Fang

Joe Heywood

Joan Capdevila Pujol

Lena Kushleyeva

Mathilde Chen

Manasa Yerramalla

Patrick Bos

Samuel T Afolabi

Taren Sanders

Chenxuan Zhao

Ian Meneghel Danilevicz

Victor Barreto Mesquita

Gaia Segantin

Xiaoyu Zong

Medical Research Council UK 

Accelting 

French National Research Agency 

g.IVIS function

<dl> <dt>Xi</dt>
<dd>Vector with acceleration values, e.g. ENMO metric.</dd> <dt>epochSize</dt>
<dd>Epoch size of the values in Xi expressed in seconds.</dd> <dt>threshold</dt>
<dd>Acceleration threshold to distinguish inactive from active</dd></dl>

Arguments

Ian Meneghel Danilevicz &lt;ian.meneghel-danilevicz@inserm.fr&gt;
 Vincent T van Hees &lt;v.vanhees@accelting.com&gt;

Author

Calculates IV and IS — g.IVIS

<dl>

 <dt>Xi</dt>
<dd>Vector with acceleration values, e.g. ENMO metric.</dd>

 <dt>epochSize</dt>
<dd>Epoch size of the values in Xi expressed in seconds.</dd>

 <dt>threshold</dt>
<dd>Acceleration threshold to distinguish inactive from active</dd>

</dl>

Calculates IV and IS

g.IVIS: Calculates IV and IS

Description

Usage

Value

Arguments

Author

References

Examples