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

Charles Annis, P.E. Charles.Annis at StatisticalEngineering.com
Mon Sep 18 23:06:01 CEST 2006

How close do you think it should be, given finite resolution with digital

> acos(0.5) - pi/3
[1] 2.220446e-16

Charles Annis, P.E.

Charles.Annis at StatisticalEngineering.com
phone: 561-352-9699
eFax:  614-455-3265

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Iñaki Murillo Arcos
Sent: Monday, September 18, 2006 1:32 PM
To: r-help at stat.math.ethz.ch
Subject: [R] acos(0.5) == pi/3 FALSE


  I don't know if the result of

  acos(0.5) == pi/3

is a bug or not. It looks strange to me.

   Inaki Murillo

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