[R] acos(0.5) == pi/3 FALSE

David Forrest drf5n at maplepark.com
Mon Sep 18 23:12:21 CEST 2006

On Mon, 18 Sep 2006, [iso-8859-1] Iñaki Murillo Arcos wrote:

> Hello,
>   I don't know if the result of
>   acos(0.5) == pi/3
> is a bug or not. It looks strange to me.

Real numbers are strange.  Would the result of:

    acos(0.5) - pi/3

close enough to zero for you?  Try help('Comparison') ,  ?'==' for an
explanation, or 'abs(acos(0.5) - pi/3) < 1e-9' for a solution.

 Dr. David Forrest
 drf at vims.edu                                    (804)684-7900w
 drf5n at maplepark.com                             (804)642-0662h

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