Read an Axivity AX3/AX6 CWA accelerometer file

Reads a raw Axivity .cwa file (the accelerometer format used by UK Biobank and other large cohorts) into a tri-axial-acceleration PhysioExperiment via the GGIRread package, in the same shape as readGT3X() / PhysioWearable::accelToPhysioExperiment().

Usage

readCWA(path, start = 1, end = NULL)

Arguments

path

Path to a .cwa file.

start, end

Block range to read (1-based). end = NULL (default) reads the whole file. For very long recordings, read in ranges.

Value

A PhysioExperiment with an acceleration assay (x/y/z, g) at the device sample rate.

References

Axivity AX3/AX6; GGIRread::readAxivity.

See also

readGT3X(), PhysioWearable::readAccelCSV()

Examples

if (FALSE) { # \dontrun{
pe <- readCWA("subject.cwa")
acc <- SummarizedExperiment::assay(pe, "acceleration")
enmo <- PhysioWearable::computeENMO(acc, sampling_rate = samplingRate(pe))
} # }