[Rd] So-called 'bug' reports PR#8102 and PR#8103

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Wed 31 Aug 2005 - 10:40:42 GMT


Neither of these have reached me on R-devel (and only PR#8103 is on the archive), and they seem to be the same error although neither mentions the other. That's 'odd', to quote one of them.

"EDT" is not a valid POSIX timezone (but, say, EST5EDT is). R's docs are quite clear that what happens with invalid inputs is system-specific. (Windows seems often to run home to PST8PDT.) You can have timezones without DST, but not one permanently in DST.

In short, these were user errors compounded by unhelpful error-recovery by the OS the users were using.

As to why tm + 3600 and tm + c(0, 1) * 3600 differ: one time is in one timezone, but two can be in different timezones so they must be handled differently. This is handled slightly differently in the R-devel version, which both the posting guide and the FAQ do ask you to try out (as well as consulting the NEWS file which has a relevant entry).

Next time, please show some consideration for those who have to clear up after you, and do as we ask in the posting guide and FAQ.

-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
Received on Wed Aug 31 20:45:35 2005

This archive was generated by hypermail 2.1.8 : Mon 20 Feb 2006 - 03:21:19 GMT