Coerce Data to Dates
Converts any of the following character forms to a Julian date: 8/31/56, 8-31-1956, 31 8 56, 083156, 31Aug56, or August 31 1956.
as.date(x, order = "mdy", ...)
- input data vector.
- if x is character, defines the order in which the terms are assumed to appear in a xx/xx/xx date. The default is month/day/year; any permutation of mdy is legal.
- if x is character, then any other arguments from
mdy.date()can be used as well.
x is numeric, then
floor(x) is returned, e.g.,
as.date(35) is the same as
as.date(35.2) and gives
Feb 2, 1960. If
x is character, the program attempts
to parse it.
- For each date, the number of days between it and January 1, 1960. The date will be missing if the string is not interpretable.
as.date(c("1jan1960", "2jan1960", "31mar1960", "30jul1960"))