detPhase-internal: Detect phases of activity from depth readings

In diveMove: Dive Analysis and Calibration

Detect phases of activity from depth readings

Description

Functions to identify sections of a TDR record displaying one of three possible activities: dry, wet, and trivial wet.

Usage

.detPhase(time, depth, dry.thr, wet.cond, wet.thr, interval)

Arguments

time	POSIXct object with date and time for all depths.
depth	numeric vector with depth readings.
dry.thr, wet.cond, wet.thr	As passed from calibrateDepth.
interval	As passed from calibrateDepth; sampling interval in seconds.

Details

See calibrateDepth.

Value

A list with components:

phase.id	Numeric vector identifying each activity phase, starting from 1 for every input record.
activity	Factor with levels “L” indicating dry, “W” indicating wet, “U” for underwater (above dive criterion), “D” for diving, “Z” for trivial wet animal activities. Only “L”, “W”, and “Z” are actually represented.
begin	A POSIXct object as long as the number of unique activity phases identified, indicating the start times for each activity phase.
end	A POSIXct object as long as the number of unique activity phases identified, indicating the end times for each activity phase.

Author(s)

Sebastian P. Luque [e-mail] and Andy Liaw.

See Also

.detDive, calibrateDepth

Examples

data(divesTDR)
depths <- getDepth(divesTDR)
times <- getTime(divesTDR)

detp <- diveMove:::.detPhase(times, depths, dry.thr=70, wet.thr=3610,
                             interval=getDtime(divesTDR))
## Plot detected phases
plotTDR(times, depths)
rect(xleft=detp$begin, xright=detp$end, ybottom=0, ytop=-4,
     col=seq_along(detp$begin))

diveMove documentation built on May 29, 2024, 6:43 a.m.