[R] date

peter dalgaard
Tue, 17 Dec 2019 23:37:57 -0000

...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.
>>
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>> 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