On Tue, Jun 29, 2010 at 6:22 AM, Simon Kiss <sjk...@gmail.com> wrote: > Dear colleagues, particularly academic ones, > So I'm creating a Microsoft Word template for myself so that every time I > teach a new course, I don't have to enter in the dates manually for each > class session. > I'd like to use an R script that can generate an irregular series of dates > starting from one date (semester begin) to another (semester end) using an > irregular interval in between (Tuesdays and Thursdays, for example). > I know that a regular series of dates is no problem, but what about an > irregular series?
Generate all the dates in the range of interest and then pick off the Tuesdays and Thursdays: dd <- seq(as.Date("2010-01-01"), as.Date("2010-12-31"), "day") dd[weekdays(dd) %in% c("Tuesday", "Thursday")] ______________________________________________ R-help@r-project.org mailing list 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.