Hi Is this the output from Excel? If so format it in Excel for a date format not a date-time format . Depending how the dates were inputted into Excel and the Excel setup a date may not be a date format. There are no rules with microsoft formatting so beware!
Regards Duncan Duncan Mackay Department of Agronomy and Soil Science University of New England Armidale NSW 2351 Email: home: mac...@northnet.com.au -----Original Message----- From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of lily li Sent: Saturday, 31 December 2016 05:38 To: Rui Barradas Cc: R mailing list Subject: Re: [R] about data format in R Hi Rui, Thanks for your reply. When I read in data using my code, the first column ranges from 0 to 1. So when I use the code you wrote, it shows the error message: Error in as.POSIXct.numeric(DF$Date, format = "%m/%d/%Y-%H:%M:%S") : 'origin' must be supplied On Fri, Dec 30, 2016 at 11:23 AM, Rui Barradas <ruipbarra...@sapo.pt> wrote: > Hello, > > Have you tried > > df$date <- as.POSIXct(dat$date, format = "%m/%d/%Y-%H:%M:%S") > > ? > > Hope this helps, > > Rui Barradas > > > > Em 30-12-2016 17:40, lily li escreveu: > >> Hi R users, >> >> I'm trying to read in data, and then plot time series data. However, I >> have >> some problems. In my dataset, the first column represents time, and in the >> format: >> mm/dd/yyyy-hr:min:sec; For example, 10/01/1995-00:00:00, >> 10/01/1995-06:00:00, etc. >> >> df: >> date evap precip intercept >> 10/01/1995-00:00:00 1.5 2 0.2 >> 10/01/1995-12:00:00 1.7 2.2 0.1 >> 10/02/1995-00:00:00 1.5 1.8 0.3 >> ... >> >> My code is like this >> file1 = read.table('df', head=T) >> >> When I read in data, I found that it read incorrectly. How to format when >> read in data? Thanks. >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> 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/posti >> ng-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> >> [[alternative HTML version deleted]] ______________________________________________ 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. ______________________________________________ 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.
