ymd
From lubridate v1.1.0
by Garrett Grolemund
Parse dates according to the order that year, month, and day elements appear
Transforms dates stored in character and numeric vectors to POSIXct objects. These functions automatically recognize the following separators: "-", "/", ".", and "" (i.e., no separators).
- Keywords
- chron
Usage
ymd(..., quiet = FALSE, tz = "UTC")
Arguments
- ...
- a character or numeric vector of suspected dates
- quiet
- logical. When TRUE function evalueates without displaying customary messages.
- tz
- a character string that specifies which time zone to parse the date with. The string must be a time zone that is recognized by the user's OS.
Details
Users should choose the function that models the order in which year(y), month(m), and date(d) appear in the dates. All inputed dates are considered to have the same order and the same separators.
ymd() type functions automatically assign the Universal
Coordinated Time Zone (UTC) to the parsed dates. This
time zone can be changed with force_tz
.
Value
- a vector of POSIXct date-time objects
See Also
Examples
x <- c("09-01-01", "09-01-02", "09-01-03")
ymd(x)
# "2009-01-01 UTC" "2009-01-02 UTC" "2009-01-03 UTC"
z <- c("2009-01-01", "2009-01-02", "2009-01-03")
ymd(z)
# "2009-01-01 UTC" "2009-01-02 UTC" "2009-01-03 UTC"
ymd(090101)
# "2009-01-01 UTC"
ymd(90101)
# "2009-01-01 UTC"
now() > ymd(20090101)
# TRUE
dmy(010210)
mdy(010210)
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