| get_last_date {chillR} | R Documentation |
Get the last date from a phenology record
Description
When looking at multi-year phenology records, it is normally obvious in which year bloom occurred last. Determining this with an automated procedure, however, is a bit tricky, when the range of phenological dates spans across a calendar year transition. This function finds the latest phenological date of the record. This is the date before the longest phenological date gap.
Usage
get_last_date(dates, first = FALSE)
Arguments
dates |
numeric vector of Julian dates (days of the year) |
first |
boolean variable that can be set to TRUE to get the first, not the last, date of the phenology record. |
Value
the latest (earliest) date of the series, under the assumption that the longest period without bloom can be interpreted as separating the phenological seasons. This should be a reasonable assumption in most cases.
Author(s)
Eike Luedeling
Examples
get_last_date(c(1,3,6,8,10,25))
get_last_date(c(345,356,360,365,2,5,7,10))
get_last_date(c(345,356,360,365,2,5,7,10),first=TRUE)