quarterly_fixed: Fixed-quarter seasonal variables

In xbioclim: Bioclimatic Variables from Monthly Climate Data

Fixed-quarter seasonal variables

Description

Convenience wrapper around quarterly_variables() for the four standard fixed quarters.

Usage

quarterly_fixed(
  tas,
  tasmax,
  tasmin,
  pr,
  quarter,
  type = c("meteorological", "calendar"),
  na.rm = FALSE,
  ...
)

Arguments

tas	Numeric vector (length 12), matrix (pixels x 12), SpatRaster with 12 layers, or BioclimData.
tasmax	Same form as tas: monthly maximum temperature.
tasmin	Same form as tas: monthly minimum temperature.
pr	Same form as tas: monthly precipitation.
quarter	Integer 1-4.
type	Character: "meteorological" (DJF, MAM, JJA, SON) or "calendar" (JFM, AMJ, JAS, OND).
na.rm	Logical. If FALSE (default), a single NA among the selected months makes all outputs NA for that pixel. If TRUE, missing months are skipped.
...	Not currently used.

Value

Same structure as quarterly_variables(): a named numeric vector of length 6 for vector input, a numeric matrix (pixels x 6) for matrix or BioclimData input, or a 6-layer SpatRaster for SpatRaster input, with variables tmean_s, tmax_max, tmin_min, trange, pr_tot, pr_cv.

xbioclim documentation built on Oct. 5, 2026, 5:08 p.m.