[R] strange floor rounding

Sarah Goslee sarah.goslee at gmail.com
Fri Jul 9 15:53:55 CEST 2010


You too have fallen victim to floating point error (see FAQ 7.31).


> (100*.58) == 58
[1] FALSE
> (100*.58) < 58
[1] TRUE


On Fri, Jul 9, 2010 at 9:46 AM, Trafim Vanishek <rdapamoga at gmail.com> wrote:
> Dear all,
>
> might seem and easy question but I cannot figure it out.
>
> floor(100*(.58))
> [1] 57
>
> where is the trick here? And how can I end up with the right answer?
>
> Thanks a lot everybody for your help.
> Trafim
>
-- 
Sarah Goslee
http://www.functionaldiversity.org



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