Re: [R] as.numeric is truncating!
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-tp990546p990568.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!
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 Øster 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.
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 Øster 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.
