import_actigraph_meta {MIMSunit}

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.

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.

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.

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

  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)