Val Another all-base R solution:
as.Date(strptime(gs$date,format="%m/%d/%y")) or if you want to add a time field later as.POSIXct(strptime(gs$date,format="%m/%d/%y"))) since strptime produces a list version of the date: class is POSIXt and the subclass is POSIXlt, that can be convenient for extracting elements like month, day of the year, minute, etc. The actual date/time information is returned as the number of seconds since 1970-01-01 00:00:00 UTC but the representation is as in your gs.d1 below. It can be a bit tricky when daylight savings time comes into play but that's for another post. David On 12/17/2019 3:51 PM, Val wrote: Hi All, I wanted to to convert character date mm/dd/yy to YYYY-mm-dd The sample data and my attempt is shown below gs <-read.table(text="ID date A1 09/27/03 A2 05/27/16 A3 01/25/13 A4 09/27/19",header=TRUE,stringsAsFactors=F) Desired output ID date d1 A1 09/27/03 2003-09-27 A2 05/27/16 2016-05-27 A3 01/25/13 2012-04-25 A4 09/27/19 2019-09-27 I used this gs$d1 = as.Date(as.character(gs$date), format = "%Y-%m-%d") but I got NA's. How do I get my desired result? Thank you. ______________________________________________ R-help@r-project.org<mailto:R-help@r-project.org> mailing list -- To UNSUBSCRIBE and more, see 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. -- David K Stevens, PhD, PE Environmental Engineering Division Civil and Environmental Engineering Utah State University 8200 Old Main Hill Logan, UT 83200-8200 (435) 797-3229 david.stev...@usu.edu<mailto:david.stev...@usu.edu> [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
