FAQ 7.31
Jim Holtman
Data Munger Guru
What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.
On Fri, Oct 3, 2014 at 8:31 AM, Matthias Salvisberg
<matthias.salvisberg at gmail.com> wrote:> I had a strange behavior of a function written a few days ago. I
> pointed the problem down to the following minimal example.
>
> can anyone explain why the following comparisons don't reply the
> same"correct" answer?
>
>
> Thanks for your reply!
>
> Matthias
>
>
>
>
> R version 3.1.1 (2014-07-10) -- "Sock it to Me"
> Copyright (C) 2014 The R Foundation for Statistical Computing
> Platform: i386-w64-mingw32/i386 (32-bit)
>
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>> sessionInfo()R version 3.1.1 (2014-07-10)
> Platform: i386-w64-mingw32/i386 (32-bit)
>
> locale:
> [1] LC_COLLATE=German_Switzerland.1252
> LC_CTYPE=German_Switzerland.1252
> LC_MONETARY=German_Switzerland.1252 LC_NUMERIC=C
> [5] LC_TIME=German_Switzerland.1252
>
> attached base packages:
> [1] stats graphics grDevices utils datasets methods base
>
> loaded via a namespace (and not attached):
> [1] tools_3.1.1> > rm(list = ls())> > myDataFrame <-
data.frame(var1 > seq(from = -1, to = 0, by = 0.01))> >
any(myDataFrame$var1 => (0.68-1))[1] TRUE> > any(myDataFrame$var1 ==
-0.32)[1] FALSE> >
> myDataFrame$var1[69][1] -0.32> > > str((0.68-1)) num -0.32>
str(-0.32)
> num -0.32> str(myDataFrame$var1) num [1:101] -1 -0.99 -0.98 -0.97
> -0.96 -0.95 -0.94 -0.93 -0.92 -0.91 ...
>
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>
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