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Re: Nearest Neighbor ... again! [message #71634 is a reply to message #71633]

Thu, 08 July 2010 06:21

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Fabzi writes:

> You probably have been asked many times, but once again this
> apparently simple problem is driving me crazy. The problem is famous:
>
> I have a 2D grid defined by x1 (dim 2 array, for example lons) and y1
> (dim2 array, for example lats). And I want to fit it to a second grid
> x2, y2. More precisely, I want to know the indexes in GRID1 that are
> the closest to each of my points in GRID2. The output of my function
> has then the same dimension as GRID2.

Unless I completely miss the point, this seems to me
to be a simple nearest neighbor interpolation from one
grid to another. CONGRID has been used for this purpose
for years. :-(

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Nearest Neighbor ... again! By: Wout De Nolf on Fri, 09 July 2010 01:56
		Re: Nearest Neighbor ... again! By: penteado on Thu, 08 July 2010 09:27
		Re: Nearest Neighbor ... again! By: jeanh on Thu, 08 July 2010 09:06
		Re: Nearest Neighbor ... again! By: Fabzi on Thu, 08 July 2010 06:40
		Re: Nearest Neighbor ... again! By: David Fanning on Thu, 08 July 2010 06:21
		Re: Nearest Neighbor ... again! By: Fabzi on Mon, 12 July 2010 01:14

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