Full_Name: D Kreil Version: 2.8.1 and 2.9.0 OS: Debian Linux Submission from: (NULL) (141.244.140.179)
Group: Accuracy I understand that most floating point numbers are approximated due to their binary storage. On the other hand, I thought that modern math CPUs used guard digits to protect against trivial underflows. Not true? # integers, no problem > 1+1+1==3 [1] TRUE # binary floating point approximation underflows > .1+.1+.1==.3 [1] FALSE > .1+.1+.1==.3 [1] FALSE # binary floating point exact for certain numbers > .1+.1==.2 [1] TRUE I know that safe code should not test for quality of floats. Still, is R underutilizing the power of the underlying hardware? Grateful for comments, David. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
