get_youth_sojourns: Label Sojourns in a data stream according to the...

In Sojourn: Apply Sojourn Methods for Processing ActiGraph Accelerometer Data

Description

Identify Sojourns using the algorithm of Hibbing et al. (2018)

Usage

get_youth_sojourns(
  vm,
  short = 30,
  Output = c("Counts", "Raw"),
  Site = c("Hip", "Wrist"),
  epoch = 1,
  difference = 15,
  threshold = 100,
  verbose = FALSE
)

Arguments

vm	vector of triaxial accelerometer values, either the vector magnitude for activity counts, or the Euclidian Norm Minus One for raw acceleration
short	numeric scalar. Shortest allowable duration for a Sojourn. Should be detected automatically from the internally-stored grid search values for the attachment site (hip or wrist) and data type (counts or raw)
Output	the data type (counts or raw)
Site	the attachment site (hip or wrist)
epoch	the epoch length, in seconds
difference	the difference parameter
threshold	the threshold parameter
verbose	logical. Print processing updates to the console?

Value

A data frame (with nrow equal to length(vm)) that gives sojourn labels and durations

Examples

data(example_data, package = "Sojourn")
get_youth_sojourns(example_data$Vector.Magnitude,
  Output = "Counts", Site = "Hip")

Sojourn documentation built on May 8, 2021, 1:06 a.m.