[R] Help for numbers close to 1 in R
Liviu Andronic
landronimirc at gmail.com
Sat Feb 13 16:34:20 CET 2010
On Sat, Feb 13, 2010 at 2:17 PM, cjmr <cjregunay at gmail.com> wrote:
>>p=1e-49
>>1+p
> [1] 1
>
Try this:
> source("http://r-bc.googlecode.com/svn/trunk/R/bc.R")
> p <- bc(1e-49)
> p
[1] ".0000000000000000000000000000000000000000000000001"
> 1+p
[1] "1.0000000000000000000000000000000000000000000000001"
You might want to check this [1] and search the archives for "precision".
Liviu
[1] http://code.google.com/p/r-bc/
> My problem comes from some values of x for the value:
> 1-exp(-sum((x-1/sqrt(3))^2))
> the return values are always equivalent.
>
> Please help
> Thanks
> --
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>
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