Marks Periods of 'Bedrest' in Actigraph Accelerometer Data

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.


Reference manual

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1.1 by J. Dustin Tracy, a year ago

Browse source code at

Authors: J. Dustin Tracy , Zhiyi Xu , Sari Acra , Kong Y. Chen , Maciej S. Buchowski , Thomas Donnelly

Documentation:   PDF Manual  

GPL (>= 3) license

Imports lubridate

Depends on chron, stringr

See at CRAN