> -----Original Message----- > From: Ted Harding [mailto:ted.hard...@manchester.ac.uk] > Sent: Sunday, May 17, 2009 3:32 PM > To: Daniel Nordlund > Cc: r-help@r-project.org > Subject: RE: [R] sprintf() question > > On 17-May-09 22:03:19, Daniel Nordlund wrote: > > When I type the following, I get results different from what I > > expected. > > > >> sprintf('%a',3) > > [1] "0x1.8" > > > > Shouldn't the result be > > > > [1] "0x1.8p+2" > > Well, not "p+2" but "p+1" > (0x1.8 = 1.1000[2] ; *2 = 11.000[2] = 3[10]) ; > however, I get: > > sprintf('%a',3) > # [1] "0x1.8p+1" > > which is indeed correct. > > R version 2.9.0 (2009-04-17) ## Same as yours > platform i486-pc-linux-gnu ## Different from yours ... > > which perhaps suggests that there may be a mis-compilation in the > Windows version. > > Ted. > > > I read through the help ?sprintf and didn't find anything > that changed > > my expectation. What am I misunderstanding? I am using > R-2.9.0 binary > > from CRAN on Windows XP Pro, and my session info is > > > > > >> sessionInfo() > > R version 2.9.0 (2009-04-17) > > i386-pc-mingw32 > > > > locale: > > LC_COLLATE=English_United States.1252;LC_CTYPE=English_United > > States.1252;LC_MONETARY=English_United > > States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252 > > > > attached base packages: > > [1] stats graphics grDevices utils datasets > methods base > >> > > > > Thanks for any enlightenment. > >
Thanks Ted! Enlightenment is what I asked for, and it is what I got. I was having a senior moment I guess. I was picturing 8 as binary 0100, when obviously it is binary 1000. So yes, the required power of 2 is 1, and it is fine with me that Windows implementation does not display it. Thanks again. Dan Daniel Nordlund Bothell, WA USA ______________________________________________ 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.
