> -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of Fang (Betty) Yang > Sent: Friday, October 23, 2009 11:06 AM > To: R-help@r-project.org > Subject: [R] extract day or month as in Splus > > Dear all, > > > > I am writing to ask for help to find R code to do the same > thing as the > following Splus code: > > > > dates <- c("02/27/1992", "02/27/1992", "01/14/1992", "02/28/1992", > "02/01/1992") > > timeDate(as.character(dates),in.format="%m/%d/%Y","%a") > > [1] Thu Thu Tue Fri Sat
You can use the POSIXct class to store the dates (instead of the S+ timeDate class) and strftime() to format the output (instead of attaching a default output format to the timeDate object): > strftime(as.POSIXct(dates, format="%m/%d/%Y"), format="%a") [1] "Thu" "Thu" "Tue" "Fri" "Sat" Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com > > > > Could anyone give me some R codes to get the same results as > above(extract > days from dates), please? > > > > Thanks in advance! > > > > Betty > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
