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Re: BYTSCL and NAN keyword [message #38278 is a reply to message #38276]

Tue, 02 March 2004 09:45

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Kenneth Bowman writes:

> Right, I understand all that. I'm just trying to understand what the
> NAN keyword is good for.
>
> If you could say NAN = 255 (or 19, or whatever), instead of just /NAN,
> it would be of some use. That way the value that NANs become in the
> output could be distinguished from valid data.
>
> As it is, the NAN keyword is only of use if you are happy with NANs
> turning into valid data in the output (i.e., indistinguishable from
> small valid values).
>
> I have to consider this an error in the way the handling of NANs was
> implemented in BYTSCL.

Ken, they are *bytes*. They only have 8 little thingamajigs.
There is not too much room for creativity here! :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		Re: BYTSCL and NAN keyword By: David Fanning on Tue, 02 March 2004 15:48
		Re: BYTSCL and NAN keyword By: Kenneth P. Bowman on Tue, 02 March 2004 15:18
		Re: BYTSCL and NAN keyword By: David Fanning on Tue, 02 March 2004 14:07
		Re: BYTSCL and NAN keyword By: JD Smith on Tue, 02 March 2004 13:32
		Re: BYTSCL and NAN keyword By: Craig Markwardt on Tue, 02 March 2004 09:39
		Re: BYTSCL and NAN keyword By: David Fanning on Tue, 02 March 2004 09:45
		Re: BYTSCL and NAN keyword By: K. Bowman on Tue, 02 March 2004 09:26
		Re: BYTSCL and NAN keyword By: David Fanning on Tue, 02 March 2004 09:18
		Re: BYTSCL and NAN keyword By: Edd Edmondson on Tue, 02 March 2004 09:13
		Re: BYTSCL and NAN keyword By: K. Bowman on Wed, 03 March 2004 07:26
		Re: BYTSCL and NAN keyword By: Kenneth P. Bowman on Tue, 02 March 2004 17:44

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