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Re: Can somebody help to explain why result from atan does not equal a r
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From: |
John Darrington |
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Subject: |
Re: Can somebody help to explain why result from atan does not equal a real? |
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Date: |
Thu, 31 Jan 2013 15:50:17 +0100 |
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User-agent: |
Mutt/1.5.20 (2009-06-14) |
On Thu, Jan 31, 2013 at 08:32:53AM -0500, Noah Lavine wrote:
What you have here is a precision problem.
scheme@(guile-user)> (= 3.14159265358979 (atan 0 -1))
$8 = #f
scheme@(guile-user)> (= $7 (atan 0 -1))
$9 = #t
It might be possible to have Guile print more digits and make this problem
go away.
Noah Lavine
pi is an irrational number. You would need an infinite number of digits
wouldn't you?
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