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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: NULL as the empty string
Date: Thu, 14 Dec 2017 17:26:01 -0800
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herrmannsfeldt@gmail.com writes:
> On Wednesday, December 13, 2017 at 9:13:10 AM UTC-8, Keith Thompson wrote:
>
> (snip)
>
>> The mean is by definition the sum divided by the count.  *If* the
>> specification calls for NaNs to be ignored, then they should be
>> ignored whether you're computing a sum or a mean.  (If all entries
>> are NaNs, then I suppose the sum would be 0 and the mean would
>> be undefined.)
>
> And the mean of zero values is?

Undefined, unless you're working with a specification that says
otherwise.  (Were you expecting something else?)

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"