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Re: table: problem with nan and if

From: Uwe Brauer
Subject: Re: table: problem with nan and if
Date: Tue, 22 Jun 2021 08:38:28 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)

> Uwe Brauer <oub@mat.ucm.es> writes:

> I'm not very familiar with calc, but am wondering if the issue is the
> 'nan'. In many languages, a nan is a 'polluting' variable i.e. once you
> have a nan as a form anywhere in your calculation, the result will
> always be a nan. Many languages actually have a special function to test
> for a nan because it isn't actually a 'value'. Don't know if this is the
> case with calc. 

Yeah, when I googled, I found complains about nan using in calc but I
did not really found an working alternative.

> Perhaps an alternative strategy might help. Could you address what is
> generating the nan and change that so that it generates something else,
> possibly even a blank string and avoid the nan altogether? 

I tried nil and other expressions but non really worked, so maybe a calc
guru could clarify?


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