g.getstarttime

Extract start time of a measurement. GGIR calculates all timestamps by
 using the first timestamp and sample frequency. Not intended
 for direct use by package user

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://theactigraph.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

Taren Sanders

Chenxuan Zhao

Ian Meneghel Danilevicz

Victor Barreto Mesquita

Gaia Segantin

Medical Research Council UK 

Accelting 

French National Research Agency 

g.getstarttime function

<dl> <dt>datafile</dt>
<dd>Full path to data file</dd> <dt>data</dt>
<dd>Data part of g.readaccfile output</dd> <dt>mon</dt>
<dd>Same as in g.dotorcomma</dd> <dt>dformat</dt>
<dd>Same as in g.dotorcomma</dd> <dt>desiredtz</dt>
<dd>Same as in g.dotorcomma</dd> <dt>configtz</dt>
<dd>Same as in g.dotorcomma</dd></dl>

Arguments

Vincent T van Hees &lt;v.vanhees@accelting.com&gt;

Author

Extract start time of a measurement — g.getstarttime

<dl>

 <dt>datafile</dt>
<dd>Full path to data file</dd>

 <dt>data</dt>
<dd>Data part of g.readaccfile output</dd>

 <dt>mon</dt>
<dd>Same as in g.dotorcomma</dd>

 <dt>dformat</dt>
<dd>Same as in g.dotorcomma</dd>

 <dt>desiredtz</dt>
<dd>Same as in g.dotorcomma</dd>

 <dt>configtz</dt>
<dd>Same as in g.dotorcomma</dd>

</dl>

Extract start time of a measurement

g.getstarttime: Extract start time of a measurement

Description

Usage

Value

Arguments

Author