Re: [foxboro] EXP with negative base in CALCA
- From: Ulrich Wieczorek <uwieczorek@xxxxxxxxxx>
- To: foxboro@xxxxxxxxxxxxx
- Date: Fri, 12 Jan 2007 16:06:05 +0100
Sascha,
this is because y = x ** p is calculated as y = e ** (log(x) * p).
You would have to calculate the logarithm of a negative number, which
isn't defined.
Regards,
Ulrich
Sascha Wildner schrieb:
> Hello,
>
> is there any reason why doing an EXP of a negative base in a CALCA block
> (haven't tried MATH or CALC) yields a PROG_ERR 9?
>
> Did I miss the lesson in school that taught negative bases are invalid?
>
> Regards,
>
--
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Ulrich Wieczorek
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