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Re: Incorrect behavior of /NAN [message #30238 is a reply to message #30033]

Mon, 15 April 2002 06:47

K. Bowman
Messages: 330
Registered: May 2000

Senior Member

In article <yx6hvgatn3vp.fsf@socrates.Berkeley.EDU>,
noymer@socrates.Berkeley.EDU wrote:

> NaN is an IEEE standard, is it not?
>
> Does the IEEE define what to do in such cases?
>
> It seems to me that IDL should conform to such a standard, if it exists,
> even if it goes against our intuition.

As far as I know, IDL correctly does arithmetic involving NaNs
(i.e., it returns NaNs, etc.).

But IDL also uses NaNs as "missing values", which is not an IEEE issue,
and the behavior here is not clearly defined in some cases.

Ken

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[Message index]

		Incorrect behavior of /NAN By: K. Bowman on Thu, 04 April 2002 07:40
		Re: Incorrect behavior of /NAN By: Craig Markwardt on Sat, 06 April 2002 07:46
		Re: Incorrect behavior of /NAN By: Kenneth P. Bowman on Sat, 06 April 2002 06:28
		Re: Incorrect behavior of /NAN By: David Fanning on Fri, 05 April 2002 17:57
		Re: Incorrect behavior of /NAN By: James Kuyper on Fri, 05 April 2002 14:53
		Re: Incorrect behavior of /NAN By: K. Bowman on Fri, 05 April 2002 14:25
		Re: Incorrect behavior of /NAN By: Craig Markwardt on Fri, 05 April 2002 13:53
		Re: Incorrect behavior of /NAN By: Paul van Delst on Fri, 05 April 2002 07:35
		Re: Incorrect behavior of /NAN By: Paul van Delst on Thu, 04 April 2002 13:52
		Re: Incorrect behavior of /NAN By: K. Bowman on Mon, 15 April 2002 06:47
		Re: Incorrect behavior of /NAN By: noymer on Sun, 14 April 2002 18:32

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