FAQ 7.31 is a start.
Understand the "precision" of floating point numbers. You probably
only
have about 15 digits (54 bits) of significance.
If you need unlimited number of digits, there are some other alternatives.
On Fri, Aug 9, 2013 at 5:54 AM, Johan Nyberg <johan@infocraft.se> wrote:
> I am confused about what I believed was artefects from reading .csv files
> with big numbers.
> Finally I checked using the console and this is what I get, the same as
> when importing:
> >
> >longnumber<-635024810560380000
> >longnumber
> [1] 635024810560380032
>
> I have tried setting "options(digits=22) and also 20 and 18 with no
> difference. R-version is x64 3.0.1
>
> Does someone know or guess why this happens?
>
> Yours
> Johan Nyberg, Sweden.
>
>
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>
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Jim Holtman
Data Munger Guru
What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.
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