How can I unsubscribe to not receive loop e mails? Sent from my Huawei Mobile
David Winsemius <dwinsem...@comcast.net> wrote: On Dec 31, 2014, at 3:24 PM, Mike Miller wrote: > This is probably a FAQ, and I don't really have a question about it, but I > just ran across this in something I was working on: > >> as.integer(1000*1.003) > [1] 1002 > > I didn't expect it, but maybe I should have. I guess it's about the machine > precision added to the fact that as.integer always rounds down: > > >> as.integer(1000*1.003 + 255 * .Machine$double.eps) > [1] 1002 > >> as.integer(1000*1.003 + 256 * .Machine$double.eps) > [1] 1003 > > > This does it right... > >> as.integer( round( 1000*1.003 ) ) > [1] 1003 > > ...but this seems to always give the same answer and it is a little faster in > my application: > >> as.integer( 1000*1.003 + .1 ) > [1] 1003 > > > FYI - I'm reading in a long vector of numbers from a text file with no more > than three digits to the right of the decimal. I'm converting them to > integers and saving them in binary format. > So just add 0.0001 or even .0000001 to all of them and coerce to integer. > Best, > Mike > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. David Winsemius Alameda, CA, USA ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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. ________________________________ This e-mail may contain information that is privileged or confidential. If you are not the intended recipient, please delete the e-mail and any attachments and notify us immediately. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
