> On Jul 19, 2018, at 12:33 PM, Rich Shepard <rshep...@appl-ecosys.com> wrote: > > On Thu, 19 Jul 2018, Rich Shepard wrote: > >> I have the date and elev columns converted from factors to date and >> numeric, respectively, but still have not learned how to convert the time. > > With this dataframe structure, > > str(wy2018) > 'data.frame': 12592 obs. of 3 variables: > $ date: Date, format: "2017-10-01" "2017-10-01" ... > $ time: chr "00:00" "00:30" "01:00" "01:30" ... > $ elev: num 290 290 290 290 290 ... > > what is my syntax error using chron() to convert the time column?
I have no idea. I think reaching for chron is not needed. > > wy2018$time <- chron(times=wy2018$time) > Error in convert.times(times., fmt) : format h:m:s may be incorrect > In addition: Warning message: > In unpaste(times, sep = fmt$sep, fnames = fmt$periods, nfields = 3) : > 12592 entries set to NA due to wrong number of fields That error suggests you needed either to add ":00" on hte end of your hh:mm formated data or provide a format string. > wy2018$myTime <- chron(times= paste(wy2018$time, ":00") ) > str(wy2018) 'data.frame': 9 obs. of 5 variables: $ date : Factor w/ 1 level "2017-10-01": 1 1 1 1 1 1 1 1 1 $ time : Factor w/ 9 levels "00:00","00:30",..: 1 2 3 4 5 6 7 8 9 $ elev : num 290 290 290 290 290 ... $ myDate: Date, format: "2017-10-01" "2017-10-01" ... $ myTime: 'times' num 00:00:00 00:30:00 01:00:00 01:30:00 02:00:00 ... ..- attr(*, "format")= chr "h:m:s" But I think that is not the right way to go. > > > Adding a format as either %h:%m or just h:m makes no difference. > > Rich > > ______________________________________________ > 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. David Winsemius Alameda, CA, USA 'Any technology distinguishable from magic is insufficiently advanced.' -Gehm's Corollary to Clarke's Third Law ______________________________________________ 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.