MIMSunit (version 0.11.2)

import_actigraph_meta: Import The meta information stored in Actigraph RAW or summary csv file.

Description

import_actigraph_meta imports meta information stored in the Actigraph summary csv file.

Usage

import_actigraph_meta(filepath, header = TRUE)

Arguments

filepath

string. The filepath of the input data.

header

logical. Whether the Actigraph RAW or summary csv file includes column names. Default is TRUE.

Value

list. A list of Actigraph device meta information.

How is it used in MIMS-unit algorithm?

This function is a File IO function that is used to get related meta information such as sampling rate, firmware version from Actigraph devices.

Details

The returned meta information includes following fields.

• sr: Sampling rate in Hz.

• fw: Firmware version. For example "1.7.0".

• sw: Software version of Actilife. For example "6.13.0".

• sn: Serial number of the device.

• st: Start time of the data, in POSIXct format.

• dt: Download time of the data, in POSIXct format.

• at: Type of the device. Could be "MAT","CLE", "MOS" or "TAS", corresponding to different Actigraph devices.

• imu: Whether the file is about Actigraph GT9X IMU data.

• gr: The dynamic range in \(g\) unit.

• vs: The voltage level of the device, may be used in AD conversion. See import_actigraph_csv.

• res: The resolution or the number of bits used to store quantized voltage values of the device, may be used in AD conversion. See import_actigraph_csv.

See Also

Other File I/O functions: export_to_actilife(), import_actigraph_count_csv(), import_actigraph_csv_chunked(), import_actigraph_csv(), import_activpal3_csv(), import_enmo_csv(), import_mhealth_csv_chunked(), import_mhealth_csv()

Examples

# NOT RUN {
  default_ops = options()
  options(digits.secs=3)

  # Use the sample actigraph csv file provided by the package
  filepath = system.file('extdata', 'actigraph_timestamped.csv', package='MIMSunit')

  # Check file format
  readLines(filepath)[1:15]

  # Load the meta headers of input file
  import_actigraph_meta(filepath, header=TRUE)

  # Restore default options
  options(default_ops)
# }