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

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




Charles Annis, P.E.

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

Hello,

  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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