step.min.AP: Estimate Time Spent Stepping
In activpalProcessing: Process activPAL Events Files

Description Usage Arguments Value Author(s) See Also Examples

This function to calculates the hours spent stepping

1	step.min.AP(posture, epoch = 1)

`posture`	posture is a vector indicating sitting (0), standing (1) and stepping (2)
`epoch`	numeric value indicating what epoch (in seconds) the data are in (e.g. 60 = 1 minute epochs). The default value is 1 second

a numeric value indicating hours spent stepping

Kate Lyden

sed.min.AP stand.min.AP

	
data(second.by.second.data)
posture <- second.by.second.data$ap.posture
	
step.min.AP(posture,epoch=1)

# summarize by date
tapply(second.by.second.data$ap.posture, second.by.second.data$date,step.min.AP,epoch=1)