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Re: 3D congrid without interpolation [message #53410 is a reply to message #53409]

Fri, 13 April 2007 17:33

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

JD Smith writes:

> How is "nearest neighbor sampling" not interpolation? Does it
> explicitly avoid knowledge of how the new array cell is positioned
> w.r.t. the old one, and simply grab averages of nearby neighbors? Why
> would this ever be preferable to a linear interpolation?

I don't know. I guess it is preferable because it
doesn't add new numbers to your data. (I never really
thought about or cared how it was done, but I suppose
someone ought to.)

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: 3D congrid without interpolation By: James Kuyper on Sat, 14 April 2007 10:59
		Re: 3D congrid without interpolation By: JD Smith on Fri, 13 April 2007 18:00
		Re: 3D congrid without interpolation By: David Fanning on Fri, 13 April 2007 17:33
		Re: 3D congrid without interpolation By: JD Smith on Fri, 13 April 2007 15:57
		Re: 3D congrid without interpolation By: Mike[2] on Fri, 13 April 2007 08:21
		Re: 3D congrid without interpolation By: Qing on Thu, 12 April 2007 19:45
		Re: 3D congrid without interpolation By: David Fanning on Thu, 12 April 2007 17:30
		Re: 3D congrid without interpolation By: Michael Galloy on Thu, 12 April 2007 15:40
		Re: 3D congrid without interpolation By: David Fanning on Thu, 12 April 2007 14:19
		Re: 3D congrid without interpolation By: mxhamidi on Mon, 16 April 2007 11:43
		Re: 3D congrid without interpolation By: JD Smith on Mon, 23 April 2007 09:53

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