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Re: Incorrect behavior of /NAN [message #30145 is a reply to message #30033]

Fri, 05 April 2002 13:53

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

Kenneth Bowman <k-bowman@null.tamu.edu> writes:

> In article <onofgz74jo.fsf@cow.physics.wisc.edu>,
> Craig Markwardt <craigmnet@cow.physics.wisc.edu> wrote:
>
>> If all the data are missing, how can the sum be NaN? Neither a return
>> value of 0, nor a return value of NaN, seems to be appropriate to
>> me. This appears to be an undefined case.
>
> If NaN represents missing data, and all of the data are missing, then the
> total is missing also, so it seems reasonable to me to return NaN.

:-)

I could easily argue the other way, in terms of reasonableness. The
sum of "no" numbers is zero.

Craig

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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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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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