[R] The elegant way to test if a number is a whole number

Alexander Engelhardt alex at chaotic-neutral.de
Thu Sep 8 20:27:14 CEST 2011


     x <- 0.2*5

gives me FALSE because R stores it as a float number, right?
Is there an elegant way to work around that problem? Right now
I'm using

     x <- 0.2*5
     round(x) == x

which returns TRUE. But more strictly I should use all.equal(),

I somehow just don't like the--pardon--ugliness of those pieces
of code. Maybe there is a beautiful way to write that. If not,
no big problem -- I just like beautiful code :-)


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