Format dates and times based on human-friendly templates.
Stamps are just like
format, but based on human-frendly
templates like "Recorded at 10 am, September 2002" or "Meeting, Sunday May
1, 2000, at 10:20 pm".
stamp(x, orders = lubridate_formats, locale = Sys.getlocale("LC_TIME"), quiet = FALSE)stamp_date(x, locale = Sys.getlocale("LC_TIME"))stamp_time(x, locale = Sys.getlocale("LC_TIME"))
- a character vector of templates.
- orders are sequences of formatting characters which might be
used for disambiguation. For example "ymd hms", "aym" etc. See
guess_formatsfor a list of available formats.
- locale in which
xis encoded. On linux like systems use
locale -ain terminal to list available locales.
- whether to output informative messages.
stamp is a stamping function date-time templates mainly, though it
correctly handles all date and time formats as long as they are
stamp_time are the specialized
stamps for dates and times (MHS). These function might be useful when the
input template is unambiguous and matches both a time and a date format.
Lubridate tries it's best to figure our the formats, but often a given
format can be interpreted in several ways. One way to deal with the
situation is to provide unambiguous formats like 22/05/81 instead of
10/05/81 if you want d/m/y format. Another option is to use a more
specialized stamp_date and stamp_time. The core function
priority to longer date-time formats.
Another option is to proved a vector of several values as
parameter. Then lubridate will choose the format which fits
best. Note that longer formats are preferred. If you have "22:23:00 PM" then
"HMSp" format will be given priority to shorter "HMS" order which also fits
the supplied string.
Finally, you can give desired format order directly as
a function to be applied on a vector of dates
D <- ymd("2010-04-05") - days(1:5) stamp("March 1, 1999")(D) sf <- stamp("Created on Sunday, Jan 1, 1999 3:34 pm") sf(D) stamp("Jan 01")(D) stamp("Sunday, May 1, 2000")(D) stamp("Sun Aug 5")(D) #=> "Sun Aug 04" "Sat Aug 04" "Fri Aug 04" "Thu Aug 04" "Wed Aug 03" stamp("12/31/99")(D) #=> "06/09/11" stamp("Sunday, May 1, 2000 22:10")(D) stamp("2013-01-01T06:00:00Z")(D) stamp("2013-01-01T00:00:00-06")(D) stamp("2013-01-01T00:00:00-08:00")(force_tz(D, "America/Chicago"))