Hello, The lowercase 'y' is year without century. This should work for you:
as.Date(x=df$CREATED.DATE, format="%d/%m/%Y") HTH, Josh On Tue, Jun 1, 2010 at 8:57 AM, arnaud Gaboury <[email protected]> wrote: > Dear group, > > Here is my df (obtained with a read.csv2()): > > > df <- > structure(list(DESCRIPTION = c("COTTON NO.2 Jul/10", "COTTON NO.2 Jul/10", > "PALLADIUM Jun/10", "PALLADIUM Jun/10", "SUGAR NO.11 Jul/10", > "SUGAR NO.11 Jul/10"), CREATED.DATE = c("13/05/2010", "13/05/2010", > "14/05/2010", "14/05/2010", "10/05/2010", "10/05/2010"), QUANITY = c(1, > 1, -1, -1, 1, 1), CLOSING.PRICE = c("81.2000", "81.2000", "503.6000", > "503.6000", "13.8900", "13.8900")), .Names = c("DESCRIPTION", > "CREATED.DATE", "QUANITY", "CLOSING.PRICE"), row.names = c(NA, > 6L), class = "data.frame") > >> str(df) > 'data.frame': 6 obs. of 4 variables: > $ DESCRIPTION : chr "COTTON NO.2 Jul/10" "COTTON NO.2 Jul/10" "PALLADIUM > Jun/10" "PALLADIUM Jun/10" ... > $ CREATED.DATE : chr "13/05/2010" "13/05/2010" "14/05/2010" "14/05/2010" > ... > $ QUANITY : num 1 1 -1 -1 1 1 > $ CLOSING.PRICE: chr "81.2000" "81.2000" "503.6000" "503.6000" ... > > I want to change the class of df$CREATED.DATE from Chr to Date: > > >>pose$CREATED.DATE=as.Date(pose$CREATED.DATE,"%d/%m/%y") > > Here is what I get : > > df <- > structure(list(DESCRIPTION = c("COTTON NO.2 Jul/10", "COTTON NO.2 Jul/10", > "PALLADIUM Jun/10", "PALLADIUM Jun/10", "SUGAR NO.11 Jul/10", > "SUGAR NO.11 Jul/10"), CREATED.DATE = structure(c(18395, 18395, > 18396, 18396, 18392, 18392), class = "Date"), QUANITY = c(1, > 1, -1, -1, 1, 1), CLOSING.PRICE = c("81.2000", "81.2000", "503.6000", > "503.6000", "13.8900", "13.8900")), .Names = c("DESCRIPTION", > "CREATED.DATE", "QUANITY", "CLOSING.PRICE"), row.names = c(NA, > 6L), class = "data.frame") > > Where does the problem comes from?? Maybe from my sytem date ?? > > TY for any help > > ______________________________________________ > [email protected] 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. > -- Joshua Wiley Senior in Psychology University of California, Riverside http://www.joshuawiley.com/ ______________________________________________ [email protected] 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.
