Implementation of the van Hees algorithm of non-wear detection.
Arguments
- data
An
impactr_data
object, as obtained with read_acc().- window1, window2
Windows size, in minutes, for the non-wear detection algorithm.
window2
must be smaller thanwindow1
, andwindow1
must be a multiple ofwindow2
.- threshold
Number of axes that need to meet the non-wear criteria.
Value
A named list of length 2 (stage1 and stage2) containing the binary
non-wear classification (0 is wear and 1 is non-wear) of each algorithm's
stage per window2
blocks.
Details
This is an internal function, designed to be used inside the wrapper function remove_nonwear() that integrates all steps of detection, removal and inspection of accelerometer non-wear time.