Thanks. Is there simple way around this for simple checking of single values? The all.equal() mentioned in the FAQ doesn't seem appropriate.
X = c(1.2, 2) > X.new = X -1 > X == 1.2 [1] TRUE FALSE > X.new == .2 [1] FALSE FALSE On 8/27/08 11:47 AM, "jim holtman" <[EMAIL PROTECTED]> wrote: > FAQ 7.31 > > On Wed, Aug 27, 2008 at 11:51 AM, David Afshartous > <[EMAIL PROTECTED]> wrote: >> >> All, >> >> I'm witnessing some strange behavior when checking the values of one of my >> variables. My guess is that it has something to do with the number of >> significant digits being represented, but perhaps not as my variable was >> created from other variables that only had one decimal place. See below. >> I'm sure this is something basic, any suggestions much appreciated. >> >> Cheers, >> David >> >> >>> visit.2.SEK.delta.baseline >> [1] 0.1 -0.7 0.8 -0.1 -0.5 0.8 0.7 0.2 0.4 0.3 0.6 0.6 0.3 0.8 >> 0.8 0.3 0.4 0.8 >>> visit.2.SEK.delta.baseline > 0 >> [1] TRUE FALSE TRUE FALSE FALSE TRUE TRUE TRUE TRUE TRUE TRUE TRUE >> TRUE TRUE TRUE TRUE TRUE TRUE >>> visit.2.SEK.delta.baseline == .8 >> [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE >> FALSE FALSE FALSE FALSE FALSE FALSE >> ### but some of the values are equal to .8 >> >> ## here it is okay when I try to reproduce >>> junk = c(0.1, -0.7,0.8, -0.1, -0.5, 0.8, 0.7, 0.2, 0.4, 0.3, 0.6, >>> 0.6, >> 0.3, 0.8, 0.8, 0.3, 0.4, 0.8 ) >>> junk == .8 >> [1] FALSE FALSE TRUE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE FALSE >> FALSE TRUE TRUE FALSE FALSE TRUE >> >> ______________________________________________ >> 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. >> > > ______________________________________________ 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.
