GGIR (version 2.7-1)

g.cwaread: Function to read .cwa-format files as produced by the accelerometer named 'Axivity'

Description

For reading .cwa-format data, if you have .wav format data then see function g.wavread

Usage

g.cwaread(fileName, start = 0, end = 0, progressBar = FALSE, 
  desiredtz = "", configtz = c(), interpolationType=1)

Value

data

dataframe with timestamp, raw x, -y, and, -z acceleration values, temperature, battery and light

header

file header

Arguments

fileName

filename (required)

start

start point for reading data, this can either be a timestamp "year-month-day hr:min:sec" or a page number (optional)

end

end point for reading data, this can either be a timestamp "year-month-day hr:min:sec" or a page number (optional)

progressBar

Is trigger to switch on/off the text progress bar. If progressBar is TRUE then the function displays the progress bar but it works slightly slower

desiredtz

Desired timezone, see documentation g.getmeta

configtz

Only functional for AX3 cwa data at the moment. Timezone in which the accelerometer was configured. Only use this argument if the timezone of configuration and timezone in which recording took place are different.

interpolationType

Integer to indicate type of interpolation to be used when resampling time series (mainly relevant for Axivity sensors), 1=linear, 2=nearest neighbour.

Author

Evgeny Mirkes <[e-mail]> Vincent van Hees <[e-mail]>