These functions look for errors in the data. A code is returned.
Usage
errorCts(x, fault = 32767)
Arguments
x
accelrometer counts or steps.
fault
numerical value that indicates voltage signal saturation (temporarily used for both accelerometer counts and steps).
Value
a vector of the same length as x.
Details
Error coded are as follow: 0, no error; 1, all values are 5-digit values or all one value; 2, negative values; 3, NAs.
References
Geraci M, Rich C, Sera F, Cortina-Borja M, Griffiths LJ, and Dezateux C (2012). Technical report on accelerometry data processing in the Millennium Cohort Study. London, UK: University College London. Available at http://discovery.ucl.ac.uk/1361699