(Ted Harding) <ted.hard...@wlandres.net> writes: > On 26-Sep-2013 07:55:38 Rolf Turner wrote: >> On 09/26/13 19:31, Babak Bastan wrote: >>> Hi experts, >>> >>> If I test sin(pi) in r, it returns me 1.224606e-16 >>> >>> Why doesn't return me 0? >>
I think this should be a Fortune: ,---- | >> If you think that 1.224606e-16 is different from 0, you should probably not | >> be using computers. | > | > Is that a Fortune? And, if so, should R be using computers? | > | > sin(pi) | > # [1] 1.224606e-16 | > sin(pi)==0 | > # [1] FALSE `---- Cheers, Rainer > >> See FAQ 7.31 (which is in a way about the inverse of >> your question, but it should provide the necessary insight). >> >> cheers, >> Rolf Turner > > Though, mind you, FAQ 3.71 does also offer some consolation to R: > > all.equal(0,sin(pi)) > # [1] TRUE > > So it depends on what you mean by "different from". Computers > have their own fuzzy concept of this ... Babak has too fussy > a concept. > > Ted. > > ------------------------------------------------- > E-Mail: (Ted Harding) <ted.hard...@wlandres.net> > Date: 26-Sep-2013 Time: 09:13:33 > This message was sent by XFMail > <#secure method=pgpmime mode=sign> -- Rainer M. Krug email: RMKrug<at>gmail<dot>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.
