Get season from date time object — cut_seasons • resourcecode

Get season from date time object

Usage

cut_seasons(
  datetime,
  definition = "meteorological",
  hemisphere = "northern",
  labels = NULL
)

Arguments

datetime: a POSIXct vector from with the season is constructed
definition: the definition used to compute the season. See details section.
hemisphere: in the Southern hemisphere, seasons are reversed compared to the Northern one.
labels: optional, a character vector of length fours with the seasons' names.

Value

a Factor vector with 4 levels depending on the definitions (and labels if provided)

Details

Available Definitions:

meteorological: Standard seasons (Dec-Feb = Winter, etc.)
astronomical: Based on equinoxes/solstices
djf: Dec-Jan-Feb, Mar-Apr-May, Jun-Jul-Aug, Sep-Oct-Nov
jfm: Jan-Feb-Mar, Apr-May-Jun, Jul-Aug-Sep, Oct-Nov-Dec
fma: Feb-Mar-Apr, May-Jun-Jul, Aug-Sep-Oct, Nov-Dec-Jan
amj, jas, ond: Alternative starting points for quarterly seasons

Examples

dates <- seq(
  from = as.POSIXct("2023-01-15"),
  to = as.POSIXct("2023-12-15"),
  by = "month"
)
cut_seasons(dates)
#>  [1] Winter Winter Spring Spring Spring Summer Summer Summer Autumn Autumn
#> [11] Autumn Winter
#> Levels: Spring Summer Autumn Winter