Hi, I have some problems with as.Date function. After I applied as.Date for my data, "2010" changed to "2020" as below Where am I wrong? Thanks Wonjae> x=c("11/16/2010","11/17/2010","11/18/2010","11/19/2010") > x=as.Date(x,"%m/%d/%y") > x[1] "2020-11-16" "2020-11-17" "2020-11-18" "2020-11-19" my R veision is 2.12.2. -- View this message in context: http://r.789695.n4.nabble.com/as-Date-function-error-tp3455466p3455466.html Sent from the R help mailing list archive at Nabble.com.
as.Date(x,"%m/%d/%Y") [1] "2010-11-16" "2010-11-17" "2010-11-18" "2010-11-19" Notice the Y (four digit date). Dennis On Sun, Apr 17, 2011 at 6:34 AM, Wonjae Lee <wjlee2002 at naver.com> wrote:> Hi, > > I have some problems with as.Date function. > After I applied as.Date for my data, "2010" changed to "2020" as below > Where am I wrong? > > Thanks > > Wonjae > >> x=c("11/16/2010","11/17/2010","11/18/2010","11/19/2010") >> x=as.Date(x,"%m/%d/%y") >> x > [1] "2020-11-16" "2020-11-17" "2020-11-18" "2020-11-19" > > my R veision is 2.12.2. > > -- > View this message in context: http://r.789695.n4.nabble.com/as-Date-function-error-tp3455466p3455466.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at 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. >
On Sun, 17 Apr 2011, Wonjae Lee wrote:> Hi, > > I have some problems with as.Date function. > After I applied as.Date for my data, "2010" changed to "2020" as below > Where am I wrong?You used %y (two-digit year, here: "20" and then expanded to "2020") instead of %Y (four-digit year, here "2010"). Using as.Date(x,"%m/%d/%Y") yields the desired result. Z> Thanks > > Wonjae > >> x=c("11/16/2010","11/17/2010","11/18/2010","11/19/2010") >> x=as.Date(x,"%m/%d/%y") >> x > [1] "2020-11-16" "2020-11-17" "2020-11-18" "2020-11-19" > > my R veision is 2.12.2. > > -- > View this message in context: http://r.789695.n4.nabble.com/as-Date-function-error-tp3455466p3455466.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at 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. >