On 22/11/2014, 2:59 PM, Stuart Ambler wrote: > A colleague¹s R program behaved differently when I ran it, and we thought > we traced it probably to different results from string comparisons as > below, with different R versions. However the platforms also differed. A > friend ran it on a few machines and found that the comparison behavior > didn¹t correlate with R version, but rather with platform. > > I wonder if you¹ve seen this. If it¹s not some setting I¹m unaware of, > maybe someone should look into it. Sorry I haven¹t taken the time to read > the source code myself.
Looks like a collation order issue. See ?Comparison. Duncan Murdoch > Thanks, > Stuart > > R version 3.0.2 (2013-09-25) -- "Frisbee Sailing" > Platform: x86_64-unknown-linux-gnu (64-bit) > Sys.getlocale() > [1] > "LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=en_US.UTF-8;LC_COLLATE=en_US.UTF > -8;LC_MONETARY=en_US.UTF-8;LC_MESSAGES=en_US.UTF-8;LC_PAPER=en_US.UTF-8;LC_ > NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.UTF-8;LC_IDENTIFICA > TION=C" > > "-1" > "1" > [1] TRUE > > "-1" <"1" > [1] FALSE > > "1" < "-1" > [1] TRUE > > "1" < "-" > [1] FALSE > > Vs. > > R version 3.1.1 (2014-07-10) ‹ ³Sock it to Me" > Platform: x86_64-redhat-linux-gnu (64-bit) > Sys.getlocale() > [1] > "LC_CTYPE=en_US.utf8;LC_NUMERIC=C;LC_TIME=en_US.utf8;LC_COLLATE=en_US.utf8 > ;LC_MONETARY=en_US.utf8;LC_MESSAGES=en_US.utf8;LC_PAPER=en_US.utf8;LC_NAME > =C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.utf8;LC_IDENTIFICATION > =C" > > "-1" > "1" > [1] FALSE > > "-1" <"1" > [1] TRUE > > "1" < "-1" > [1] FALSE > > "1" < "-" > [1] FALSE > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel