...and switch the order, and use %y for 2-digit years.> On 17 Dec 2019, at 23:57 , Patrick (Malone Quantitative) <malone at malonequantitative.com> wrote: > > Try putting / instead of - in your format, to match the data. > > On Tue, Dec 17, 2019 at 5:52 PM Val <valkremk at gmail.com> 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 at 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. > > ______________________________________________ > R-help at 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.-- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Office: A 4.23 Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com
library(lubridate) gs$dat1 <- mdy(gs$date) On Tue, 17 Dec 2019 at 18:38, peter dalgaard <pdalgd at gmail.com> wrote:> > ...and switch the order, and use %y for 2-digit years. > > > On 17 Dec 2019, at 23:57 , Patrick (Malone Quantitative) <malone at malonequantitative.com> wrote: > > > > Try putting / instead of - in your format, to match the data. > > > > On Tue, Dec 17, 2019 at 5:52 PM Val <valkremk at gmail.com> 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 at 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. > > > > ______________________________________________ > > R-help at 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. > > -- > Peter Dalgaard, Professor, > Center for Statistics, Copenhagen Business School > Solbjerg Plads 3, 2000 Frederiksberg, Denmark > Phone: (+45)38153501 > Office: A 4.23 > Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com > > ______________________________________________ > R-help at 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.-- John Kane Kingston ON Canada
>>>>> John Kane >>>>> on Tue, 17 Dec 2019 20:28:17 -0500 writes:> library(lubridate) > gs$dat1 <- mdy(gs$date) there's really no reason for going beyond base R. Using the proper format as per Patrick and Peter's advice (below) is perfectly clear and actually more robust (for the next data set etc) than going via "good guessing" in extra packages. > On Tue, 17 Dec 2019 at 18:38, peter dalgaard <pdalgd at gmail.com> wrote: >> >> ...and switch the order, and use %y for 2-digit years. >> >> > On 17 Dec 2019, at 23:57 , Patrick (Malone Quantitative) <malone at malonequantitative.com> wrote: >> > >> > Try putting / instead of - in your format, to match the data. >> > >> > On Tue, Dec 17, 2019 at 5:52 PM Val <valkremk at gmail.com> 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 at 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. >> > >> > ______________________________________________ >> > R-help at 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. >> >> -- >> Peter Dalgaard, Professor, >> Center for Statistics, Copenhagen Business School >> Solbjerg Plads 3, 2000 Frederiksberg, Denmark >> Phone: (+45)38153501 >> Office: A 4.23 >> Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com >> >> ______________________________________________ >> R-help at 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. > -- > John Kane > Kingston ON Canada > ______________________________________________ > R-help at 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.