[R] Odp: seq(...) strange logical value

[Petr PIKAL]

Hi

r-help-bounces at r-project.org napsal dne 08.06.2009 10:45:15:

> 
> Do you heve any idea why I get after this instruction everywhere false?
> > seq (0, 1, by=0.1) == 0.3
>  [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> 
> But after different step it's ok:
> > seq(0, 1, by=0.1) == 0.4
>  [1] FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE

Do not use computer, it is known to be imprecise.

See FAQ 7.31 Why doesn't R think these numbers are equal

Regards
Petr


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