wr_ad_lb1499

A dataset containing time information and counts/epoch.

datasets

Contains a function to categorize accelerometer readings collected in free-living (e.g., for 24 hours/day for 7 days), preprocessed and compressed as counts (unit-less value) in a specified time period termed epoch (e.g., 1 minute) as either bedrest (sleep) or active.  The input is a matrix with a timestamp column and a column with number of counts per epoch. The output is the same dataframe with an additional column termed bedrest. In the bedrest column each line (epoch) contains a function-generated classification 'br' or 'a' denoting bedrest/sleep and activity, respectively.  The package is designed to be used after wear/nonwear marking function in the 'PhysicalActivity' package.  Version 1.1 adds preschool thresholds and corrects for possible errors in algorithm implementation.

J. Tracy

PhysActBedRest

Marks Periods of 'Bedrest' in Actigraph Accelerometer Data

wr_ad_lb1499 function

A dataset with 4,505 rows and 2 variables:<dl class="dl-horizontal">
<dt>TS</dt><dd>(TimeStamp) date and time in POSIXlt format.</dd> 
<dt>Axis 1</dt><dd>counts/minute for the vertical axis.</dd> 
</dl>

Format

Wrist Accelerometer data from an adult subject lb1499 — wr_ad_lb1499

A dataset with 4,505 rows and 2 variables:<dl class='dl-horizontal'>
<dt>TS</dt><dd>(TimeStamp) date and time in POSIXlt format.</dd> 
<dt>Axis 1</dt><dd>counts/minute for the vertical axis.</dd> 
</dl>

wr_ad_lb1499: Wrist Accelerometer data from an adult subject lb1499

Description

Usage

Arguments

Format