parseActivityBin: Parse activity samples from a NHANES-GT3X file

In THLfi/read.gt3x: Parse 'ActiGraph' 'GT3X'/'GT3X+' 'Accelerometer' Data

Parse activity samples from a NHANES-GT3X file

Description

Parse activity samples from a NHANES-GT3X file

Usage

parseActivityBin(
  filename,
  max_samples,
  scale_factor,
  sample_rate,
  verbose = FALSE,
  debug = FALSE
)

Arguments

filename	path to a activity.bin file inside the unzipped gt3x folder, which contains the activity samples
max_samples	Maximum number of rows to parse. The returned matrix will always contain this number of rows, having zeroes if not data is found.
scale_factor	Scale factor for the activity samples.
sample_rate	sampling rate for activity samples.
verbose	Print the parameters from the activity.bin file and other messages?
debug	Print information for every activity second

Value

Returns a matrix with max_samples rows and 3 columns, where the first 3 columns are the acceleration samples and the last column is timestamps in seconds (including hundredth of seconds) starting from 00:00:00 1970-01-01 UTC (UNIX time)

THLfi/read.gt3x documentation built on July 6, 2022, 11:06 a.m.