This is one of the joys of floating point arithmetic. Look at the 7th element of
seq(0,1,.1) - 0.6 Also, check the all.equal(x,y,tolerance=epsilon ) function. John -----r-devel-boun...@r-project.org wrote: ----- To: r-de...@stat.math.ethz.ch From: alexandre.court...@gmail.com Sent by: r-devel-boun...@r-project.org Date: 02/24/2009 08:55AM cc: r-b...@r-project.org Subject: [Rd] invalid comparison in numeric sequence (PR#13551) Full_Name: alex Version: 2.8.1 OS: Ubuntu / MacOSX Submission from: (NULL) (162.38.183.51) > 0.6==0.6 [1] TRUE > seq(0,1,0.1)==0.4 [1] FALSE FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE FALSE > seq(0,1,0.1)==0.6 [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE > seq(0,1,0.1)==0.8 [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE FALSE FALSE What is wrong with 0.6 ??? (TRUE is missing) I tried 3 differents computers (2 Ubuntu with R 2.8.1, and one Mac with R 2.8). ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
