g.part4 {GGIR}

Labels detected sustained inactivity periods by g.part3 as either part of the Sleep Period Time window or not

Description

Combines output from g.part3 and guider information to estimate sleep variables. See vignette paragraph "Sleep and full day time-use analysis in GGIR" for an elaborate descript of the sleep detection.

Usage

 g.part4(datadir = c(), metadatadir = c(), f0 = f0, f1 = f1, params_sleep = c(), 
    params_metrics = c(),  params_cleaning = c(), params_output = c(),
                   params_general = c(), verbose = TRUE, ...)

Arguments

datadir

Directory where the accelerometer files are stored, e.g. "C:/mydata", or list of accelerometer filenames and directories, e.g. c("C:/mydata/myfile1.bin", "C:/mydata/myfile2.bin").

metadatadir

Directory that holds a folder 'meta' and inside this a folder 'basic' which contains the milestone data produced by g.part1. The folderstructure is normally created by g.part1 and GGIR will recognise what the value of metadatadir is.

f0

File index to start with (default = 1). Index refers to the filenames sorted in alphabetical order

f1

File index to finish with (defaults to number of files available, i.e., f1 = 0)

params_sleep

List of parameters used for sleep analysis (GGIR part 3, 4, and 5): see documentation g.part3.

params_metrics

List of parameters used for metrics extraction (GGIR part 1): see documentation g.part1.

params_cleaning

See details in GGIR.

params_output

See details in GGIR.

params_general

See details in GGIR.

verbose

See details in GGIR.

...

To ensure compatibility with R scripts written for older GGIR versions, the user can also provide parameters listed in the params_ objects as direct argument.

Value

The function does not produce values but generates an RData file in the milestone subfolder ms4.out which incudes a dataframe named nightsummary. This dataframe is used in g.report.part4 to create two reports one per night and one per person. See package vignette paragraph "Output part 4" for description of all the variables.

Author(s)

Vincent T van Hees <[e-mail]>

References

• van Hees VT, Sabia S, et al. (2018) AEstimating sleep parameters using an accelerometer without sleep diary, Scientific Reports.

• van Hees VT, Sabia S, et al. (2015) A novel, open access method to assess sleep duration using a wrist-worn accelerometer, PLoS ONE.

Examples

  ## Not run: 
    metadatadir = "C:/myfolder/meta" # assumes that there is a subfolder in
    # metadatadir named 'ms3.out' containing the output from g.part3
    g.part4(metadatadir=metadatadir)
  
## End(Not run)