FAQ 7.31 Sent from my iPad
On Oct 11, 2011, at 1:07, Mark Harrison <harrisonma...@gmail.com> wrote: > I am having a problem with extra digits being added to my data which I think > is a result of how I am converting my data.frame data to xts. > > I see the same issue in R v2.13.1 and RStudio version 0.94.106. > > I am loading historical foreign exchange data in via csv files or from a sql > server database. In both cases there are no extra digits and the original > data looks like the following: > > Date Open High Low Close > 1 2001-01-03 1.5021 1.5094 1.4883 1.4898 > 2 2001-01-04 1.4897 1.5037 1.4882 1.5020 > 3 2001-01-05 1.5020 1.5074 1.4952 1.5016 > 4 2001-01-08 1.5035 1.5104 1.4931 1.4964 > 5 2001-01-09 1.4964 1.4978 1.4873 1.4887 > 6 2001-01-10 1.4887 1.4943 1.4856 1.4866 > > So for 2001-01-03 the Open value is 1.5021 with only 4 digits after the > decimal place - i.e. .5021. > > I then proceed to do the following in R to convert the 'british pound' data > above from data.frame to xts: > > Require(quantmod) > rownames(gbp) <- gbp$Date > head(gbp) > > Open High Low Close > 2001-01-03 1.5021 1.5094 1.4883 1.4898 > 2001-01-04 1.4897 1.5037 1.4882 1.5020 > 2001-01-05 1.5020 1.5074 1.4952 1.5016 > 2001-01-08 1.5035 1.5104 1.4931 1.4964 > 2001-01-09 1.4964 1.4978 1.4873 1.4887 > 2001-01-10 1.4887 1.4943 1.4856 1.4866 > > gbp<- as.xts(gbp[,2:5]) > class(gbp) > > [1] "xts" "zoo" > > The data at this point looks ok until you look closer or output the data to > excel at which point you see the following for the 'Open' 2001-01-03: > 1.50209999084473 > > It is not just the above 'Open' or the first value but all the data points > contain the extra digits which I think is the original date data and/or row > numbers that are being tacked on. > > My problem is the extra digits being added or whatever I am doing wrong in R > to cause the extra digits to be added. I need 1.5021 to be 1.5021 and not > 1.50209999084473. > > Thanks for the help. > > [[alternative HTML version deleted]] > > ______________________________________________ > 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.
