[R] Is this correct?

[ecatchpole]

See the R FAQ list, section 7. Why doesn't R think these numbers are equal?

Ted.

On 11/10/05 15:42,  Joe wrote,:
> Dear userR,
> 
> With the following results, are they correct or acceptable?
> 
>>x <- c(1.4, 1.2, 2.8)
>>sum(x)
> [1] 5.4
>>sum(x) == 5.4
> [1] FALSE
>>(1.4 + 1.2 + 2.8) - 5.4
> [1] -8.881784e-16
>>(1.4 + 1.2) - 2.6
> [1] -4.440892e-16
>>2.6 - 1.5 - 1.1
> [1] 0
> 
>>version
>          _
> platform i386-pc-mingw32
> arch     i386
> os       mingw32
> system   i386, mingw32
> status
> major    2
> minor    2.0
> year     2005
> month    10
> day      06
> svn rev  35749
> language R
> 
> What can I do to correct them if they are not correct?
> Thanks!
> --
> C. Joseph Lu
> Department of Statistics
> National Cheng-Kung University
> Tainan, Taiwan, ROC
> 
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-- 
Dr E.A. Catchpole
Visiting Fellow
Univ of New South Wales at ADFA, Canberra, Australia
and University of Kent, Canterbury, England
- www.ma.adfa.edu.au/~eac
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