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NaN or 0.0 [message #8969]

Tue, 20 May 1997 00:00

Christophe Morisset is currently offline

Christophe Morisset
Messages: 2
Registered: March 1997

Junior Member

Hello,
I'm "transporting" an IDL code from a DecAlpha to a PC (i.e. Unix =>
Linux)
And I meet problems with the NaN under Linux:

Under Unix:
IDL> print,exp(alog(0))
% Program caused arithmetic error: Floating overflow
% Detected at $MAIN$
% Program caused arithmetic error: Floating underflow
% Detected at $MAIN$
0.00000

Under Linux:
IDL> print,exp(alog(0))
-NaN
% Program caused arithmetic error: Floating illegal operand

In both case, the program say I'm doing something wrong,
but with the Unix version, I can continue to work...

Is it possible to say the Linux-IDL not to use this
&*%$%# NaN absorbing element?
It seems to me it as something to do with something
called IEEE, but I don't understand what it is ;-)

Tahnks a lot if you have any idea,
--

Christophe Morisset

Observatoire de Paris-Meudon
Tel: (+33) 1-45-07-75-66
Fax: (+33) 1-45-07-74-69
mailto:morisset@daec.obspm.fr
http://daec.obspm.fr/~morisset

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[Message index]

		NaN or 0.0 By: Christophe Morisset on Tue, 20 May 1997 00:00
		Re: NaN or 0.0 By: marq on Wed, 21 May 1997 00:00

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