[R] as.numeric is truncating!

[ticspd]

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.dalgaard at biostat.ku.dk)              FAX: (+45) 35327907
> 
> ______________________________________________
> R-help at 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.