Dear All, I have the following problem:
I have a function in which I check if the difference between values is smaller or equal to a certain threshold. I however realized that I might get there some unexpected results: > abs(1 - 0.95) >= 0.05 [1] TRUE ## So that’s fine, but: > abs(1 - 0.95) <= 0.05 [1] FALSE Apparently, abs(1 - 0.95) is not equal to 0.05, which I find however quite disturbing. Along these lines: > abs(0.95 - 1) > 0.05 [1] TRUE > abs(0.95 - 1) < 0.05 [1] FALSE I guess that has to do with the floating point representation of the data? Is there something I miss or is there any solution to this? Thanks for any help! cheers, jo I tried this on different R-version (including 3.2.3 and 3.3.0 alpha); The R-version I used for the code above is: > sessionInfo() R version 3.0.2 (2013-09-25) Platform: x86_64-unknown-linux-gnu (64-bit) locale: [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C [3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 [5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 [7] LC_PAPER=en_US.UTF-8 LC_NAME=C [9] LC_ADDRESS=C LC_TELEPHONE=C [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base ______________________________________________ R-help@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.
