Professor Ripley You asked “how that managed to give TRUE? (I apologize for the mangled quotes — the error occurred with plain quotes). All that I can say is that R versions <= 3.1.0 allowed my code to execute without error. The bug report appears to address the issue. I typically review Dalgaard’s list of changes in each new version — it does not contain anything about this bug fix.
Dennis Dennis Fisher MD P < (The "P Less Than" Company) Phone: 1-866-PLessThan (1-866-753-7784) Fax: 1-866-PLessThan (1-866-753-7784) www.PLessThan.com On Aug 8, 2014, at 1:54 AM, Prof Brian Ripley <rip...@stats.ox.ac.uk> wrote: > On 07/08/2014 23:37, Fisher Dennis wrote: >> R 3.1.1 >> OS X (and Windows) >> >> Colleagues >> >> I have some code that manages files. Previously (as late as 3.1.0), the >> command: >> file.info(FILENAME)$mtime == “” >> yielded T/F >> >> Now, it triggers an error: >> Error in as.POSIXlt.character(x, tz, ...) : >> character string is not in a standard unambiguous format >> >> I looked through Peter Dalgaard’s list of changes in 3.1.1 and I cannot find >> anything that would explain the change between versions. I have fixed the >> problem. However, I am concerned that other problems may be lurking (i.e., >> the changes might affect other commands). >> >> Of note, I ran: >> str(file.info(FILENAME)$mtime) >> in both versions of R and the results did not differ >> >> Can anyone explain what changed so that I can search my code efficiently? > > Can you explain how that managed to give TRUE (sic)? It was always a POSIXct > timestamp, and as such is never equal "" (assuming that your mail client > mangled ASCII double quotes). > > I believe the relevant report is > https://bugs.r-project.org/bugzilla/show_bug.cgi?id=15829 > > > >> >> Thanks in advance. >> >> Dennis >> >> >> Dennis Fisher MD >> P < (The "P Less Than" Company) >> Phone: 1-866-PLessThan (1-866-753-7784) >> Fax: 1-866-PLessThan (1-866-753-7784) >> www.PLessThan.com > ______________________________________________ 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.
