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Re: The continuing saga of WHERE and 2D [message #34240 is a reply to message #34238]

Thu, 27 February 2003 13:07

Liam E. Gumley
Messages: 378
Registered: January 2000

Senior Member

"Sean Raffuse" <sean@me.wustl.edu> wrote in message
news:b3lt4h$5gr$1@newsreader.wustl.edu...
> Ok, so I've found the nifty little WhereToMulti program that converts 1D
> where() results back to the original 2d or 3d indices. My question, and I
> am sensing that it is a dumb one, is how can I use these returned indices
> properly?
>
> Example:
>
> ;the part that works (stolen wholesale from D Fanning's website)
> index = WHERE(image EQ test)
> s = SIZE(image)
> ncol = s(1)
> col = index MOD ncol
> row = index / ncol
>
> ;the part I am confused about
> image[col, row] = PassedTheTest
>
> *** Error, too many elements in array. . . and you're ugly. ***

Maybe I'm missing something, but why not use

image[index] = PassedTheTest

You're allowed to use 1D indices to access any n-dimensional array.

Cheers,
Liam.
Practical IDL Programming
http://www.gumley.com/

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[Message index]

		Re: The continuing saga of WHERE and 2D By: JD Smith on Fri, 28 February 2003 09:43
		Re: The continuing saga of WHERE and 2D By: David Fanning on Fri, 28 February 2003 09:52
		Re: The continuing saga of WHERE and 2D By: Paul Van Delst[1] on Fri, 28 February 2003 10:26
		Re: The continuing saga of WHERE and 2D By: JD Smith on Fri, 28 February 2003 09:35
		Re: The continuing saga of WHERE and 2D By: marc schellens[1] on Thu, 27 February 2003 22:43
		Re: The continuing saga of WHERE and 2D By: marc schellens[1] on Thu, 27 February 2003 22:50
		Re: The continuing saga of WHERE and 2D By: David Fanning on Thu, 27 February 2003 14:47
		Re: The continuing saga of WHERE and 2D By: Sean Raffuse on Thu, 27 February 2003 13:30
		Re: The continuing saga of WHERE and 2D By: David Fanning on Thu, 27 February 2003 13:29
		Re: The continuing saga of WHERE and 2D By: Liam E. Gumley on Thu, 27 February 2003 13:07
		Re: The continuing saga of WHERE and 2D By: Sean Raffuse on Thu, 27 February 2003 12:55
		Re: The continuing saga of WHERE and 2D By: David Fanning on Thu, 27 February 2003 12:55
		Re: The continuing saga of WHERE and 2D By: Pavel Romashkin on Fri, 28 February 2003 10:15

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