This should be FAQ 0.0. No other thing is asked as frequently as this. This is the FAQest of all FAQs, and a mother of all FAQs. At least this should be in R posting guide: "Read FAQ 7.31 before posting!"
Cheers, Jari Oksanen On 07/02/2013, at 12:13 PM, R. Michael Weylandt wrote: > R FAQ 7.31 > > Cheers, > MW > > On Thu, Feb 7, 2013 at 10:05 AM, Davide Rambaldi <davide.ramba...@ieo.eu> > wrote: >> Hello everybody: >> >> I get a strange behavior with seq, take a look at this: >> >>> msd <- seq(0.05,0.3, 0.01) >>> msd[13] >> [1] 0.17 >>> class(msd) >> [1] "numeric" >>> class(msd[13]) >> [1] "numeric" >>> typeof(msd[13]) >> [1] "double" >> >> now the problem: >> >>> msd[13] == 0.17 >> [1] FALSE >> >> It is strange only to me? >> >> Consider that: >> >>> 0.17 == 0.17 >> [1] TRUE >> >> and also >> >>> a <- c(0,1,0.17) >>> a >> [1] 0.00 1.00 0.17 >>> a[3] == 0.17 >> [1] TRUE >> >> It's a BUG in seq? I suspect something related to doubles … >> >> sessionInfo(): >> >> R version 2.15.2 (2012-10-26) >> Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit) >> >> locale: >> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 >> >> attached base packages: >> [1] stats graphics grDevices utils datasets methods base >> >> loaded via a namespace (and not attached): >> [1] tools_2.15.2 >> >> >> ----------------------------------------------------------- >> PLEASE NOTE MY NEW EMAIL ADDRESS >> ----------------------------------------------------------- >> >> ----------------------------------------------------- >> Davide Rambaldi, PhD. >> ----------------------------------------------------- >> IEO ~ MolMed >> [e] davide.ramba...@ieo.eu >> [e] davide.ramba...@gmail.com >> >> ______________________________________________ >> 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 -- Jari Oksanen, Dept Biology, Univ Oulu, 90014 Finland jari.oksa...@oulu.fi, Ph. +358 400 408593, http://cc.oulu.fi/~jarioksa ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
