Hi David and Rui, Sorry to be so slow in replying. Thank you both for pointing out that the problem with my code was that I was using comparison operators on mixed data types. This is something I'll have to be more careful about in the future.
In an earlier email, David talked about how R can seem uncooperative or even "unfair" when you're just starting out. I too have had this experience, but it seems less "unfair" each time I use it. This time, I was able to write inelegant but functional code to solve my problem. Last time, I wasn't able to solve a much simpler problem at all. So I guess that's a kind of progress. At this point, I have serviceable code for checking my dates. I can improve this when I begin to develop some real skill as an R programmer, but it will do nicely for now. Thanks everyone for your help with this. Paul ______________________________________________ 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.
