GGIR (version 2.7-1)

g.weardec: Detects whether accelerometer is worn

Description

Uses the object produced by g.part1 to assess whether the accelerometer was worn

Usage

g.weardec(M,wearthreshold,ws2)

Value

• r1 Participant id extracted from file

• r2 Night number

• r3 Detected onset of sleep expressed as hours since the previous midnight

• LC fraction of 15 minute windows with more than 5 percent clipping

• LC2 fraction of 15 minute windows with more than 80 percent clipping

Arguments

M

Object produced by g.getmeta

wearthreshold

Number of axis that at least need to meet the non-wear criteria

ws2

Large windowsize used in seconds to apply non-wear detection Small window size not needed, because this is inherent to the object M

Author

Vincent T van Hees <[e-mail]>

Examples

data(data.getmeta)
output = g.weardec(M=data.getmeta,wearthreshold=2,ws2=3600)