[R] numeric not equal its value

[Rui Barradas]

Hello,

That's FAQ 7.31.
Note that the increment, 0.05, is not a power of 2 so the third value of 
the sequence is not exactly equal to 0.15.

Hope this helps,

Rui Barradas

Em 20-05-2013 13:36, Jannis escreveu:
> Dear R users,
>
>
>
> I ran into the strange situation where a number does not seem to equal
> its value. Try this:
>
>
>
> a <- seq(0.05,0.7,0.05)[3]
>
> b <- 0.15
>
> a == b
>
>
> Should this not be TRUE? a-b yields a very small number (and not 0) so
> this most probably is a numerical error, but why does seq create such
> numbers?
>
>
> Thanks a lot
> Jannis
>
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