available. See Bastide et al. (2017) <doi:10.1111/rssb.12206> and
Bastide et al. (2018) <doi:10.1093/sysbio/syy005>.

Title: Marks Periods of 'Bedrest' in Actigraph Accelerometer Data
Author: J. Dustin Tracy, Zhiyi Xu, Sari Acra, Kong Y. Chen, Maciej S. Buchowski
Description: 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.

Author: J. Dustin Tracy, Zhiyi Xu, Sari Acra, Kong Y. Chen, Maciej S. Buchowski, Thomas Donnelly
Maintainer: J. Dustin Tracy <tracy@chapman.edu>
Description: 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.

Package: PhysicalActivity
Version: 0.1-0
Date: 2010-09-15
Title: Process Physical Activity Accelerometer Data
Author: Leena Choi, Zhouwen Liu, Charles E. Matthews, and Maciej S.
Buchowski
Maintainer: Leena Choi <leena.choi@Vanderbilt.Edu>
Description: This package contains functions to classify monitor wear
and nonwear time intervals in accelerometer data collected to
assess physical activity in free-living condition. The package
also contains functions to make plot for accelerometer data,
and to obtain the summary of daily monitor wear time and the
mean of monitor wear time during valid days. A monitored day is
considered valid if the total minutes of classified monitor
wear time per day is greater than a user defined cutoff.
License: GPL (>= 3)
Packaged: 2010-09-15 14:38:33 UTC; choil
Repository: CRAN
Date/Publication: 2010-09-15 15:49:54