Convert an object to a date or date-time
Convert an object to a date or date-time
as_date(x, ...) ## S4 method for signature 'ANY' as_date(x, ...) ## S4 method for signature 'POSIXt' as_date(x, tz = NULL) ## S4 method for signature 'numeric' as_date(x, origin = lubridate::origin) ## S4 method for signature 'character' as_date(x, tz = NULL, format = NULL) as_datetime(x, ...) ## S4 method for signature 'POSIXt' as_datetime(x, tz = "UTC") ## S4 method for signature 'numeric' as_datetime(x, origin = lubridate::origin, tz = "UTC") ## S4 method for signature 'character' as_datetime(x, tz = "UTC", format = NULL) ## S4 method for signature 'ANY' as_datetime(x, tz = "UTC")
x |
a vector of POSIXt, numeric or character objects |
... |
further arguments to be passed to specific methods (see above). |
tz |
a time zone name (default: time zone of the POSIXt object |
origin |
a Date object, or something which can be coerced by
|
format |
format argument for character methods. When supplied parsing is
performed by |
a vector of Date objects corresponding to x.
These are drop in replacements for as.Date() and as.POSIXct(), with a few
tweaks to make them work more intuitively.
Called on a POSIXct object, as_date() uses the tzone attribute of
the object to return the same date as indicated by the printed representation
of the object. This differs from as.Date, which ignores the attribute and
uses only the tz argument to as.Date() ("UTC" by default).
Both functions provide a default origin argument for numeric vectors.
Both functions will generate NAs for invalid date format. A warning message will provide a count of the elements that were not converted
as_datetime() defaults to using UTC.
dt_utc <- ymd_hms("2010-08-03 00:50:50")
dt_europe <- ymd_hms("2010-08-03 00:50:50", tz="Europe/London")
c(as_date(dt_utc), as.Date(dt_utc))
c(as_date(dt_europe), as.Date(dt_europe))
## need not supply origin
as_date(10)
## Will replace invalid date format with NA
dt_wrong <- c("2009-09-29", "2012-11-29", "2015-29-12")
as_date(dt_wrong)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.