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Re: [Q]IDL: Using WHERE. [message #5973 is a reply to message #5962]

Wed, 20 March 1996 00:00

Mirko Vukovic
Messages: 124
Registered: January 1996

Senior Member

Mark Rivers wrote:

> I think this will cut the computation time:
>
> t = (array gt 20) ; t(i) will be 0 or 1 depending upon comparison
> b = where(t) ; b is the indices of the > 20 elements
> c = where(t-1) ; c is the indices of the <= 20 elements
>
> This method avoids doing the floating point comparison twice.
> Yesss!! good thinking and thanks a lot. I was wondering how one might
be able to accomplish this
--
Mirko Vukovic, Ph.D. mirko.vukovic@grc.varian.com
Varian Research Center Phone: (415) 424-4969
3075 Hansen Way, M/S K-109 Fax: (415) 424-6988
Palo Alto, CA 94304-1025

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[Message index]

		Re: [Q]IDL: Using WHERE. By: steinhh on Fri, 22 March 1996 00:00
		Re: [Q]IDL: Using WHERE. By: Paul Schopf on Thu, 21 March 1996 00:00
		Re: [Q]IDL: Using WHERE. By: Thomas A. McGlynn on Thu, 21 March 1996 00:00
		Re: [Q]IDL: Using WHERE. By: Mirko Vukovic on Wed, 20 March 1996 00:00
		Re: [Q]IDL: Using WHERE. By: rivers on Wed, 20 March 1996 00:00
		Re: [Q]IDL: Using WHERE. By: Andy Loughe on Tue, 19 March 1996 00:00

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