Maybe this [1] will help? Or just read ?strptime... You can also calculate sunrise/sunset (crepuscule) using maptools, but you need to be careful with timezones.
[1] https://jdnewmil.github.io/time-2018-10/MoreDatetimeHowto.html On July 17, 2022 8:47:19 PM PDT, Gregory Coats via R-help <r-help@r-project.org> wrote: >For the year from 2022-01-01 to 2022-12-31, I computed the sunrise and sunset >times for Reston, Virginia, USA. I am seeking the syntax to direct R to read >in these dates and times, and then graphical plot the sunrise and sunset times >for each day in the year 2022. How do I tell R that I store the Sunrise Date >and Time like this? >YYYY-mm-dd HH:MM:SS >2022-01-01 7:28:10 >2022-01-02 7:28:17 >Greg Coats > [[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. -- Sent from my phone. Please excuse my brevity. ______________________________________________ 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.
