[R] as.numeric is truncating!
I am trying to convert a string to a double using "as.numeric" However, R is truncating the results! Options(digits) is set to 7. Can anyone shed some light on this? Thanks! > b[1] [1] "116.28125" > summary(b[1]) Length Class Mode 1 character character > c <- as.numeric(b[1]) > c [1] 116.2812 -- View this message in context: http://n4.nabble.com/as-numeric-is-truncating-tp990546p990546.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.
Re: [R] as.numeric is truncating!
ah perfect .. digits = 8 is actually 8 digits TOTAL, not 8 digits after the decimal point! setting the default to 15 works for me thank you! Berend Hasselman wrote: > > > > > ticspd wrote: >> >> I am trying to convert a string to a double using "as.numeric" >> However, R is truncating the results! >> >> Options(digits) is set to 7. >> >> Can anyone shed some light on this? >> Thanks! >> > b[1] >> [1] "116.28125" >>> summary(b[1]) >>Length Class Mode >> 1 character character >> >>> c <- as.numeric(b[1]) >>> c >> [1] 116.2812 >> > > Try the following: > > ?round > > (Note: and look in the Details section). > > as.numeric("116.28135") > > Set options(digits=8) and do the print again. > > R is not truncating; it is following certain rounding rules on printing > the number given the required > numbers of digits to show. > > Berend > -- View this message in context: http://n4.nabble.com/as-numeric-is-truncating-tp990546p990594.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.
Re: [R] as.numeric is truncating!
thank you. and for those who didn't get the reference: http://en.wikipedia.org/wiki/Ren%C3%A9_Magritte http://en.wikipedia.org/wiki/Ren%C3%A9_Magritte Peter Dalgaard wrote: > > ticspd wrote: >> I am trying to convert a string to a double using "as.numeric" >> However, R is truncating the results! > > No it isn't! As someone phrased it recently, there's a difference > between an object and the display of an object. "Ceci n'est pas une pipe". > >> Options(digits) is set to 7. > > So numbers are _printed_ to 7-digit accuracy, yes. (And 116.28125 has 8 > digits.) > >> Can anyone shed some light on this? > > Subtract 116, and enlightenment should follow. > > >> Thanks! >> >> >>> b[1] >> [1] "116.28125" >> >>> summary(b[1]) >>Length Class Mode >> 1 character character >> >>> c <- as.numeric(b[1]) >>> c >> [1] 116.2812 >> >> >> > > > -- > O__ Peter Dalgaard Ă˜ster Farimagsgade 5, Entr.B >c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K > (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 > ~~ - (p.dalga...@biostat.ku.dk) FAX: (+45) 35327907 > > __ > 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. > > -- View this message in context: http://n4.nabble.com/as-numeric-is-truncating-tp990546p990749.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.