stand.min.AP {activpalProcessing} | R Documentation |
This function to calculates the hours spent standing
stand.min.AP(posture, epoch = 1)
posture |
posture is 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 standing
Kate Lyden
data(second.by.second.data) posture <- second.by.second.data$ap.posture stand.min.AP(posture,epoch=1) # summarize by date tapply(second.by.second.data$ap.posture, second.by.second.data$date, stand.min.AP,epoch=1)