Although it does not apply to your series and is impractical, it seems to me that the most accurate algorithm might be to add all the rational numbers whose sum and components can be represented without error in binary first, ie 2.5 + .5 or 1/16 + 1/16 + 1/8.
You could also get very clever and investigate a sum that should have an exact binary representation when the individual components do not, ie .1 + .2 + .2 = .5 and correct the sum. Roger -- View this message in context: http://r.789695.n4.nabble.com/Best-way-to-compute-a-sum-tp2267566p2277096.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
