Hi Ogbos, I get the correct result using strptime: dta$date<-strptime(paste(dta$year,dta$month,dta$day,dta$hour), "%y %m %d %H" ) > dta$date [1] "1998-05-01 02:00:00 AEST" "1998-05-01 03:00:00 AEST" [3] "1998-05-01 04:00:00 AEST" "1998-05-01 05:00:00 AEST" [5] "1998-05-01 06:00:00 AEST" "1998-05-01 07:00:00 AEST" [7] "1998-05-01 08:00:00 AEST" "1998-05-01 09:00:00 AEST" [9] "1998-05-01 10:00:00 AEST" "1998-05-01 11:00:00 AEST" [11] "1998-05-01 12:00:00 AEST" "1998-05-01 13:00:00 AEST" [13] "1998-05-01 14:00:00 AEST" "1998-05-01 15:00:00 AEST" [15] "1998-05-01 16:00:00 AEST" "1998-05-01 17:00:00 AEST" [17] "1998-05-01 18:00:00 AEST" "1998-05-01 19:00:00 AEST" [19] "1998-05-01 20:00:00 AEST" "1998-05-01 21:00:00 AEST" [21] "1998-05-01 22:00:00 AEST" "1998-05-01 23:00:00 AEST" [23] "1998-05-02 00:00:00 AEST" "1998-05-02 01:00:00 AEST" [25] "1998-05-02 02:00:00 AEST" "1998-05-02 03:00:00 AEST" [27] "1998-05-02 04:00:00 AEST" "1998-05-02 05:00:00 AEST" [29] "1998-05-02 06:00:00 AEST"
Same result with ISOdatetime(dta$year,dta$month,dta$day,dta$hour,0,0,tz="GMT") as.POSIXct(ISOdatetime(dta$year,dta$month,dta$day,dta$hour,0,0,tz="GMT")) As it should be as the lower two call strptime. I can't see from your code why the month and day are transcribed. Jim ______________________________________________ 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.
