Hi, I am a little bit perplexed at why I am getting some values as FALSE:> cpgbins <- seq(0,1,0.05)> cpgbins[1] 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00> cpgbins[1] == 0.00[1] TRUE> cpgbins[2] == 0.05[1] TRUE> cpgbins[3] == 0.10[1] TRUE> cpgbins[4] == 0.15[1] FALSE> cpgbins[5] == 0.20[1] TRUE> cpgbins[6] == 0.25[1] TRUE> cpgbins[7] == 0.30[1] FALSE> class(cpgbins)[1] "numeric"> class(cpgbins[7])[1] "numeric" What is the cause for this? thanks!! [[alternative HTML version deleted]]
FAQ 7.31, or take a university course in numerical analysis. https://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f On June 18, 2018 2:45:29 PM PDT, Brian Smith <bsmith030465 at gmail.com> wrote:>Hi, > >I am a little bit perplexed at why I am getting some values as FALSE: > >> cpgbins <- seq(0,1,0.05) > >> cpgbins >[1] 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 >0.65 >0.70 0.75 0.80 0.85 0.90 0.95 1.00 > >> cpgbins[1] == 0.00 >[1] TRUE >> cpgbins[2] == 0.05 >[1] TRUE >> cpgbins[3] == 0.10 >[1] TRUE >> cpgbins[4] == 0.15 >[1] FALSE >> cpgbins[5] == 0.20 >[1] TRUE >> cpgbins[6] == 0.25 >[1] TRUE >> cpgbins[7] == 0.30 >[1] FALSE > >> class(cpgbins) >[1] "numeric" > >> class(cpgbins[7]) >[1] "numeric" > >What is the cause for this? > >thanks!! > > [[alternative HTML version deleted]] > >______________________________________________ >R-help at 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.-- Sent from my phone. Please excuse my brevity.
FAQ 7.31. Binary arithmetic. Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Mon, Jun 18, 2018 at 2:45 PM, Brian Smith <bsmith030465 at gmail.com> wrote:> Hi, > > I am a little bit perplexed at why I am getting some values as FALSE: > > > cpgbins <- seq(0,1,0.05) > > > cpgbins > [1] 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 > 0.70 0.75 0.80 0.85 0.90 0.95 1.00 > > > cpgbins[1] == 0.00 > [1] TRUE > > cpgbins[2] == 0.05 > [1] TRUE > > cpgbins[3] == 0.10 > [1] TRUE > > cpgbins[4] == 0.15 > [1] FALSE > > cpgbins[5] == 0.20 > [1] TRUE > > cpgbins[6] == 0.25 > [1] TRUE > > cpgbins[7] == 0.30 > [1] FALSE > > > class(cpgbins) > [1] "numeric" > > > class(cpgbins[7]) > [1] "numeric" > > What is the cause for this? > > thanks!! > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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. >[[alternative HTML version deleted]]
What Jeff, said, plus to see it explicitly:> print(cpgbins[5:7], digits=18)[1] 0.200000000000000011 0.250000000000000000 0.300000000000000044> print(c(0.2, 0.25, 0.3), digits=18)[1] 0.200000000000000011 0.250000000000000000 0.299999999999999989 -Don -- Don MacQueen Lawrence Livermore National Laboratory 7000 East Ave., L-627 Livermore, CA 94550 925-423-1062 Lab cell 925-724-7509 ?On 6/18/18, 2:53 PM, "R-help on behalf of Jeff Newmiller" <r-help-bounces at r-project.org on behalf of jdnewmil at dcn.davis.ca.us> wrote: FAQ 7.31, or take a university course in numerical analysis. https://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f On June 18, 2018 2:45:29 PM PDT, Brian Smith <bsmith030465 at gmail.com> wrote: >Hi, > >I am a little bit perplexed at why I am getting some values as FALSE: > >> cpgbins <- seq(0,1,0.05) > >> cpgbins >[1] 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 >0.65 >0.70 0.75 0.80 0.85 0.90 0.95 1.00 > >> cpgbins[1] == 0.00 >[1] TRUE >> cpgbins[2] == 0.05 >[1] TRUE >> cpgbins[3] == 0.10 >[1] TRUE >> cpgbins[4] == 0.15 >[1] FALSE >> cpgbins[5] == 0.20 >[1] TRUE >> cpgbins[6] == 0.25 >[1] TRUE >> cpgbins[7] == 0.30 >[1] FALSE > >> class(cpgbins) >[1] "numeric" > >> class(cpgbins[7]) >[1] "numeric" > >What is the cause for this? > >thanks!! > > [[alternative HTML version deleted]] > >______________________________________________ >R-help at 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. -- Sent from my phone. Please excuse my brevity. ______________________________________________ R-help at 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.