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Re: IDL Question - Opposite of WHERE? [message #35464 is a reply to message #35320]

Wed, 11 June 2003 17:25

Mark Hadfield
Messages: 783
Registered: May 1995

Senior Member

"James Kuyper" <kuyper@saicmodis.com> wrote in message
news:3EE7B26D.AD5E4A35@saicmodis.com...
> Instead of where(x eq 4), just use where(x ne 4). There's a
> corresponding way to re-write any condition, to become it's reverse. And
> of course, there's always the brute-force method of reversing your
> condition with the NOT operator, but I find that a less elegant
> solution.

Not to mention the fact that NOT does *not* work as expected with WHERE. See

http://www.dfanning.com/code_tips/bitwiselogical.html

--
Mark Hadfield "Ka puwaha te tai nei, Hoea tatou"
m.hadfield@niwa.co.nz
National Institute for Water and Atmospheric Research (NIWA)

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[Message index]

		IDL Question - Opposite of WHERE? By: suicidal_10 on Wed, 11 June 2003 15:28
		Re: IDL Question - Opposite of WHERE? By: David Fanning on Thu, 12 June 2003 07:26
		Re: IDL Question - Opposite of WHERE? By: R.G. Stockwell on Thu, 12 June 2003 04:37
		Re: IDL Question - Opposite of WHERE? By: Craig Markwardt on Wed, 11 June 2003 18:21
		Re: IDL Question - Opposite of WHERE? By: Mark Hadfield on Wed, 11 June 2003 17:25
		Re: IDL Question - Opposite of WHERE? By: Chad Bender on Wed, 11 June 2003 16:41
		Re: IDL Question - Opposite of WHERE? By: James Kuyper on Wed, 11 June 2003 15:51

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