JDay_later: Check whether a Julian date is after another one

Description Usage Arguments Value Author(s) Examples

View source: R/before_after_JDay.R

Description

For two Julian dates, this function checks whether the first date is later than the second date within a user-defined phenological season. This is particularly useful for seasons that start in one year and end in the next, because simple > or < operations can produce wrong results then.

Usage

1
JDay_later(check_date, ref_date, season = c(1, 366))

Arguments

check_date

integer ranging from 1 to 366, indicating a Julian date. This is the date for which to check whether it is after the reference date. If this is a vector, all elements are checked against the reference date.

ref_date

integer ranging from 1 to 366, indicating a Julian date. This is the reference date.

season

integer vector of length 2, specifying the beginning and end of the phenology season, respectivcely.

Value

Boolean result (TRUE/FALSE) of the comparison.

Author(s)

Eike Luedeling

Examples

1
JDay_later(check_date=10,ref_date=365,season=c(305,59))

chillR documentation built on Jan. 11, 2022, 5:07 p.m.