On 6/22/2011 1:34 PM, Sarah Goslee wrote: > On Wed, Jun 22, 2011 at 2:28 PM, David Winsemius <dwinsem...@comcast.net> > wrote: >> >> On Jun 22, 2011, at 2:03 PM, Sarah Goslee wrote: >> >>> Hi, >>> >>> On Wed, Jun 22, 2011 at 11:40 AM, Alexander Shenkin <ashen...@ufl.edu> >>> wrote: >>>>> >>>>> is.na(strptime("5/2/1992", format="%m/%d/%Y")) >>>> >>>> [1] FALSE >>>>> >>>>> is.na(strptime("5/3/1992", format="%m/%d/%Y")) >>>> >>>> [1] TRUE >>> >>> I can't reproduce your problem on R 2.13.0 on linux: >> >> I also cannot reproduce it on a Mac with 2.13.0 beta > > Which strongly suggests that you should start by upgrading your R > installation if at all possible. > > I'd also recommend trying it on a default R session, with no extra > packages loaded, and no items in your workspace. It's possible that > something else is interfering. > > On linux, that's achieved by typing R --vanilla at the command line. > I'm afraid I don't know how to do it for Windows, but should be > similarly straightforward. > Thanks Sarah. Still getting the problem. I should surely upgrade, but still, not a bad idea to get to the bottom of this, or at least have it documented as a known issue. BTW, I'm on Windows 7 Pro x64.
(running Rgui.exe --vanilla): > is.na(strptime("5/3/1992", format="%m/%d/%Y")) [1] TRUE > is.na(strptime("5/2/1992", format="%m/%d/%Y")) [1] FALSE > sessionInfo() R version 2.12.1 (2010-12-16) Platform: i386-pc-mingw32/i386 (32-bit) locale: [1] LC_COLLATE=English_United States.1252 [2] LC_CTYPE=English_United States.1252 [3] LC_MONETARY=English_United States.1252 [4] LC_NUMERIC=C [5] LC_TIME=English_United States.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base ______________________________________________ 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.