timestamp {bReeze}R Documentation

Format time stamps


Converts time stamps from string to POSIXlt. The conversion specification (pattern) is looked up if not given as argument.


timestamp(timestamp, pattern, tz)
ts(timestamp, pattern, tz)



Time stamp as string vector.


Conversion specification of time stamp as string (optional). See Details for usage.


Optional character string specifying the time zone to be used for the conversion. System-specific (see as.POSIXlt), but "" is the current time zone (used as default). Use "?" to check timestamp for time zone abbreviation.


If the time stamp is already formatted as POSIXlt, the usage of timestamp is not necessary. strptime can also be used to create an applicable time stamp. Usage of timestamp is recommeded, since it checks the created time stamp, thus faulty time stamps are avoided.


A conversion specification is introduced by "%", usually followed by a single letter. Any character in the format string not part of a conversion specification is interpreted literally. Widely implemented conversion specifications include:

For details see strptime.


Returns a POSIXlt vector.


Christian Graul

See Also

POSIXlt, strptime, mast


## Not run: 
# load and prepare data
data("winddata", package="bReeze")

# format time stamp
timestamp <- timestamp(timestamp=winddata[,1])

# format time stamp with given pattern
timestamp.2 <- timestamp(timestamp=winddata[,1], "%d.%m.%Y %H:%M")

# wrong pattern (
timestamp.2 <- timestamp(timestamp=winddata[,1], "%d.%m.%y %H:%M")

# strange time stamp pattern
ts <- c("TS 08/2012-10 8h10m30s", "TS 08/2012-10 8h20m30s", 
  "TS 08/2012-10 8h30m30s")
timestamp.3 <- timestamp(timestamp=ts)	# pattern not found
timestamp.3 <- timestamp(timestamp=ts, "TS %m/%Y-%d %Hh%Mm%Ss")

# time zones
# manually define time zone
timestamp.4 <- timestamp(timestamp=winddata[,1], tz="CET")

# get time zone from timestamp
timestamp.5 <- timestamp(timestamp="2012-08-08 22:55 GMT", tz="?")

## End(Not run)

[Package bReeze version 0.4-3 Index]