moult: date2days – R documentation

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date2days

Convert date to day count

Convert date mm/dd/yyyy to days since the 1st of startmonth, starting with days = 1 for the 1st day of startmonth.

date2days(date, dateformat, startmonth)

`date`	date character string with format as specified in dateformat
`dateformat`	string specifying format of date, e.g. "mm/dd/yyyy", "yyyy-dd-mm", "dd–mm" etc.
`startmonth`	integer between 1 and 12 indicating month from which to start counting.

Returns an integer = number of days since 1st of startmonth, starting with 1 = 1st of startmonth.

Bo T. Bonnevie

date2days("01/01/2010", "dd/mm/yyyy", 1)
date2days("01-01-2010", "dd-mm-yyyy", 2)
date2days("2008/06/01", "yyyy/mm/dd", 8)    # year has no effect

Models for Analysing Moult in Birds

v2.1.0

GPL-2

Authors

Birgit Erni <birgit.erni@uct.ac.za>. Based on models developed by Underhill and Zucchini (1988, 1990).

Initial release

2017-12-20