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