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Determine the different phases of the day

calc_phase_day.Rd

This function can estimate day-time and night-time based on light level (dbscan) or using the location and time data (noaa).

Usage

calc_phase_day(
  dataset,
  light = "lightatsurf",
  date = "date",
  id = ".id",
  lon = "lon",
  lat = "lat",
  method = "noaa"
)

Arguments

dataset

A dataset containing the light level per individual per time

light

Name of the light-level column

date

Name of the datetime column

id

Name of the individual ID column

lon

Name of the Longitude column

lat

Name of the Latitude column

method

Method used to identify phases of day

Value

Return the same data.table with an additional phase columns

Details

Methods:

* DBSCAN: use the dbscan clustering algorithm to identify night time and so daytime. * NOAA: using the algorithms provided by the Notional Oceanic & Atmospheric Administration (NOAA) * ...: to be implemented

References

`vignette("phase_of_the_day")`

See also

crepuscule

Examples

if (FALSE) {
# load data
data("data_nes")

# night and day calculation
result <- calc_phase_day(rbindlist(data_nes$year_2018,
  use.name = TRUE,
  idcol = TRUE
))
}