markingTime: Mark Days
In PhysicalActivity: Process Accelerometer Data for Physical Activity Measurement

Description Usage Arguments Value Author(s) References

This function adds a "day" variable to the source dataset. The day is marked in numeric order, according to the timestamp variable.

1	markingTime(dataset, timestamp, startTime = "00:00:00", tz = "UTC")

`dataset`	The source dataset, in dataframe format, which needs to be marked.
`timestamp`	The column name in the dataset that will be used as timestamp.
`startTime`	Define the starting time of a day. It must be in the format of "hh:mm:ss".
`tz`	Local time zone, defaults to UTC.

A dataframe with an extra day marking column.

Zhouwen Liu zhouwen.liu@vumc.org

Choi L, Liu Z, Matthews CE, Buchowski MS. Validation of accelerometer wear and nonwear time classification algorithm. Med Sci Sports Exerc. 2011 Feb;43(2):357-64.

PhysicalActivity documentation built on Jan. 23, 2021, 1:06 a.m.