[R] [External] R rounding problem?
@rr@ypro|||e @end|ng |rom y@hoo@com
Fri Sep 4 07:38:34 CEST 2020
Thanks Richard. Got it now...
On Thursday, September 3, 2020, 10:12:36 PM PDT, Richard M. Heiberger <rmh using temple.edu> wrote:
On Fri, Sep 4, 2020 at 12:47 AM array chip via R-help
<r-help using r-project.org> wrote:
> I made a mistake today on simple counting in R, that almost got me into trouble. After trying multiple times, I finally figured out it's rounding issue in R.
> For exmaple, when I just simply type:
> > (6.9-6.3) > 0.6
>  TRUE
> 6.9-6.3 should be 0.6 exactly, but R thinks that it's greater than 0.6!!
> Similarly, R thinks 5.6-5.5 is smaller than 0.1:
> > (5.6-5.5) < 0.1
>  TRUE
> Why is the above happening? This rounding issue seems to be small, but this could cause serious problem in real world.
> Can anyone shed a light on how to avoid the issue?
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